Here is the article.
Apple stock, which currently trades at $243 per share, is up over 50% so far this year and over 100% in the past three years; the company’s market value has reached nearly $1.1 trillion.
Sunday, December 15, 2019
30 Signs Someone Will Never Become Rich
Here is the article.
30. Terrrified of failure
29. You only work 40 hours per week
28. Public speaking makes you nervous
27. You avoid talking on the phone
26. You refuse to move
25. Working by the hour
24. A jack of all trades, but a master of none
23. All talk, no action
22. Never reading
21. Being chronically late
20. Waiting for a miracle
19. Not having financial goals
18. Never trying new things
17. Hating your job
16. Seeking approval from others
15. Taking care of others instead of yourself
14. Starting projects and never finishing them
13. Focusing too much on saving
12. You don't have investments
11. Taking advice from other poor people
10. Not believing in yourself
9. Lacking discipline
8. Commuting over an hour to work
7. Buying things you can't afford
6. Pursuing someone else's dreams instead of your own
5. Content with a paycheck
4. Imagining that getting rich is impossible
3. Accepting wrong kinds of feedback
2. Unable to adapt
1. A lack of motivation
My favorite learning is the following:
20 Wait for a miracle
30. Terrrified of failure
29. You only work 40 hours per week
28. Public speaking makes you nervous
27. You avoid talking on the phone
26. You refuse to move
25. Working by the hour
24. A jack of all trades, but a master of none
23. All talk, no action
22. Never reading
21. Being chronically late
20. Waiting for a miracle
19. Not having financial goals
18. Never trying new things
17. Hating your job
16. Seeking approval from others
15. Taking care of others instead of yourself
14. Starting projects and never finishing them
13. Focusing too much on saving
12. You don't have investments
11. Taking advice from other poor people
10. Not believing in yourself
9. Lacking discipline
8. Commuting over an hour to work
7. Buying things you can't afford
6. Pursuing someone else's dreams instead of your own
5. Content with a paycheck
4. Imagining that getting rich is impossible
3. Accepting wrong kinds of feedback
2. Unable to adapt
1. A lack of motivation
My favorite learning is the following:
25 Working by the hour
The only way people truly get rich is to be paid by results, rather than time. Every single human being has the same 24 hours in a day. The rich ones just figure out a way to make money in a short amount of time. They don’t worry about getting paid by the hour. The end result matters much more.
Statistically speaking, poor people tend to be religious, and rich people are more likely to be agnostic or atheist.
Case study: Design youtube or netflix
Dec. 15, 2019
I like to spend next 30 minutes to read the article called Designing Youtube or Netflix before 12:00 AM. Now it is 8:58 PM.
Introduction
I like to spend next 30 minutes to read the article called Designing Youtube or Netflix before 12:00 AM. Now it is 8:58 PM.
Author who studies millionaires: How to get rich and then stay rich
Here is the article.
I think that it is important for me to enjoy being frugal. I do not need to take a vacation to fly somewhere. I should stay in the city of Vancouver, and enjoy simple things in life.
Also it is important for me to learn how to put wealth to work. I have to learn how to invest, and work on my finance literacy.
One more thing is to count how I spend time on daily activities. I should choose healthy life style.
Being rich, or becoming financially independent, boils down to a two-step process:
- Accumulate wealth
- Keep the wealth you've accumulated
Getting rich
Daily growth
Rich relationship
Dream-setting
Persistence
Developing a niche
Creating multiple streams of income - create a hedge against failure and poverty. When one stream suffers, the others come to rescue.
Being patient
Taking calculated risks
Being optimistic and enthusiastic
Controlling your thoughts, emotions and words
community
Staying open-minded
Giving first and getting later
Finishing what you start
Staying healthy
Taking responsibility
Staying rich
put your wealth to work - invest it wisely in stocks, bonds, real estate and other business opportunities. this helps multiply your wealth.
Watch what you spend
Avoid spontaneous or emotional purchases
Live below your means
Actionable Items
I think that it is important for me to enjoy being frugal. I do not need to take a vacation to fly somewhere. I should stay in the city of Vancouver, and enjoy simple things in life.
Also it is important for me to learn how to put wealth to work. I have to learn how to invest, and work on my finance literacy.
One more thing is to count how I spend time on daily activities. I should choose healthy life style.
Case study: Instagram system design
Dec. 15, 2019
It is well-written article how to design instgram. There are 11 pages in grokking system design. I like to take some notes for each page, I just finished the reading of those pages.
I do believe that best learning is to read the content. I should learn how to read better, and also take some notes if I come cross some concepts, good analysis with explanation.
Simple version of instgram, where a user can share photos and can also follow other uses. The 'News Feed' for each user will consist of top photos from all the people the user follows.
Functional requirements
1. users should be able to upload/ download/ view photos
2. user can perform searches based on photo/ video titles
3. user can follow other users
4. The system should be able to generate and display a user's News Feed consisting of top photos from all the people the user follows.
Non-functional requirements
block storage servers to store photos and also some database servers to store metadata information about the photos.
data about users, their uploaded photos, and people they follow.
tables:
Photo
User
UserFollow
RDBMS like MySQL, problems when we need to scale them
A distributed file storage like HDFS or S3
Key-value store
wide-column datastore like Cassandra
relationships - users and photos, who owns which photo
a list of people a user follows
UserPhoto - key is UserID, value will be a list of photoIDs
UserFollow table -
Cassandra or key-value stores in general, always maintain a certain number of replicas to offer reliability. Also, deletes don't get applied instantly, data is retained for certain days (to support undeleting)
I will google Cassandra and have a short review later on.
web servers have a connection limit, for example 500 connections
To handle this bottleneck we can split reads and writes into separate services. Dedicated servers for reads and different servers for writes to ensure that uploads don't hog the system.
multiple copies of each file, multiple replicas of services running in the system.
single point of failure - redundancy removes the possible problem.
Data sharding
one DB shard is 4TB, and then 178 shards for 712 TB.
append shard number with each PhotoID -
Introduction
It is well-written article how to design instgram. There are 11 pages in grokking system design. I like to take some notes for each page, I just finished the reading of those pages.
Case study
I do believe that best learning is to read the content. I should learn how to read better, and also take some notes if I come cross some concepts, good analysis with explanation.
Simple version of instgram, where a user can share photos and can also follow other uses. The 'News Feed' for each user will consist of top photos from all the people the user follows.
Requirements/ Goals
Functional requirements
1. users should be able to upload/ download/ view photos
2. user can perform searches based on photo/ video titles
3. user can follow other users
4. The system should be able to generate and display a user's News Feed consisting of top photos from all the people the user follows.
Non-functional requirements
High level system design
block storage servers to store photos and also some database servers to store metadata information about the photos.
Database schema
data about users, their uploaded photos, and people they follow.
tables:
Photo
User
UserFollow
RDBMS like MySQL, problems when we need to scale them
A distributed file storage like HDFS or S3
Key-value store
wide-column datastore like Cassandra
relationships - users and photos, who owns which photo
a list of people a user follows
UserPhoto - key is UserID, value will be a list of photoIDs
UserFollow table -
Cassandra or key-value stores in general, always maintain a certain number of replicas to offer reliability. Also, deletes don't get applied instantly, data is retained for certain days (to support undeleting)
I will google Cassandra and have a short review later on.
Component design
web servers have a connection limit, for example 500 connections
To handle this bottleneck we can split reads and writes into separate services. Dedicated servers for reads and different servers for writes to ensure that uploads don't hog the system.
Reliability and redundancy
multiple copies of each file, multiple replicas of services running in the system.
single point of failure - redundancy removes the possible problem.
Data sharding
one DB shard is 4TB, and then 178 shards for 712 TB.
append shard number with each PhotoID -
How to push myself to learn more from onsite interview?
Dec. 15, 2019
It is time for me to prepare a checklist, what I can learn more from the onsite interview. I like to move my focus away from myself, and then try to push myself to work on improvement during onsite. As I learn from a talk yesterday, system design interview is like giving out a tech talk, I have to learn how to cover more areas instead of pushing by the interviewer.
I should always ask clarifying questions. Ask more questions to show interesting, and also explore the algorithm or topic more carefully.
As I learn from the book talking about decision making, I should at least find more than one solution, and two solutions have less risk, three solutions should be perfect; more than three is waste of time. Three solutions will reduce the risk of mistakes, and then choose one of solutions to get into detail.
Introduction
It is time for me to prepare a checklist, what I can learn more from the onsite interview. I like to move my focus away from myself, and then try to push myself to work on improvement during onsite. As I learn from a talk yesterday, system design interview is like giving out a tech talk, I have to learn how to cover more areas instead of pushing by the interviewer.
Think like a senior engineer
I should always ask clarifying questions. Ask more questions to show interesting, and also explore the algorithm or topic more carefully.
As I learn from the book talking about decision making, I should at least find more than one solution, and two solutions have less risk, three solutions should be perfect; more than three is waste of time. Three solutions will reduce the risk of mistakes, and then choose one of solutions to get into detail.
Leadership vocabulary learned from Google interview video
Be authentic, transparent, humble, knowledgeable, challenge some of your choices. You are not expectable most knowledgeable person, but we do expect you to seek out and work with the teams or individuals who are the best-suited partners to solve a problem or make a decision.
I like to write down those terms by alphabetic order:
open mind
go out ways to communicate
status quo
outside the box
project management skills
remain adaptable
open space for creativity
I like to write down those terms by alphabetic order:
open mind
go out ways to communicate
status quo
outside the box
project management skills
remain adaptable
open space for creativity
Prepare for Your Google Interview: Leadership
Here is the link.
0:34/ 4:57
We will be evaluating you on:
But we do expect you to seek out and work with the teams or individuals who are the best-suited partners to solve a problem or make a decision.
2:10
Explain to us how you handle these situations with understanding and care, how you avoid escalating the issue.
2:61/ 4:57
Have you formulated your team mission?
Who are the users?
What are you solving for?
3:27/ 4:57
We'll be looking for:
0:34/ 4:57
We will be evaluating you on:
- Communication and leadership style
- Navigating complexity and ambiguity
- Working with teams
- Vision
- Delivering results
But we do expect you to seek out and work with the teams or individuals who are the best-suited partners to solve a problem or make a decision.
2:10
Explain to us how you handle these situations with understanding and care, how you avoid escalating the issue.
2:61/ 4:57
Have you formulated your team mission?
Who are the users?
What are you solving for?
3:21/ 4:57
Evaluate you project management skills and deliver results3:27/ 4:57
We'll be looking for:
- Define clear goals
- Develop a plan
- Delegate tasks
- Manage progress
- Maintain team focus
We want to understand how you think and how you make decisions, so it's important to explain your thought process during the interview.
Best practice
Best practice
- Explain
- Clarify
- Improve
- What you learn and how you grow
How to evaluate candidate in behavior interview
Dec. 15, 2019
It is my task to write something I learn from Google interview video. The topic is called how to evaluate the candidate.
. Did the candidate understand the question, including the basic problem?
. Did they ask clarifying questions?
. What relevant information, stakeholders, and variables were considered?
. Did the candidate identify multiple solution options?
. Were they able to reasonably justify why their solution was the best options?
. Did the candidate listen to incorporate any feedback/ hints from probing questions?
Introduction
It is my task to write something I learn from Google interview video. The topic is called how to evaluate the candidate.
Candidate evaluation
. Did the candidate understand the question, including the basic problem?
. Did they ask clarifying questions?
. What relevant information, stakeholders, and variables were considered?
. Did the candidate identify multiple solution options?
. Were they able to reasonably justify why their solution was the best options?
. Did the candidate listen to incorporate any feedback/ hints from probing questions?
Case study: How to plan an event of new Google office opening?
Dec. 15, 2019
I like to learn how to make a plan, since I make mistakes recently in Willingdon Chinese small group reunion. I like to use this case study to help me to learn better.
Here is the video including this case starting from 7:00/ 11:02.
Introduction
I like to learn how to make a plan, since I make mistakes recently in Willingdon Chinese small group reunion. I like to use this case study to help me to learn better.
Case study
Here is the video including this case starting from 7:00/ 11:02.
Framework to answer GCA interview
Take a moment before responding
Ask clarifying questions
Share logical assumptions
Show your work
Consider the pros and cons
Think about how you measure success
Tie it back to the role
Ask clarifying questions
Share logical assumptions
Show your work
Consider the pros and cons
Think about how you measure success
Tie it back to the role
General cognitive ability interview
Dec. 15, 2019
It is interesting topic and I like to look into called GCA interview. It is to test interviewee's general cognitive ability.
General cognitive ability - GCA interview, behavior interview, past behavior, sample interview question: what did you fail? tell me the time you fail? How to break complex problems into small solvable pieces, thoughtful solutions.
What is a GCA interview?
Evaluation of your problem solving skills
Insight into your work style
Opportunity to talk through situations you may face at Google
Introduction
It is interesting topic and I like to look into called GCA interview. It is to test interviewee's general cognitive ability.
GCA interview
General cognitive ability - GCA interview, behavior interview, past behavior, sample interview question: what did you fail? tell me the time you fail? How to break complex problems into small solvable pieces, thoughtful solutions.
What is a GCA interview?
Evaluation of your problem solving skills
Insight into your work style
Opportunity to talk through situations you may face at Google
Actionable Items
I need to evaluate myself as a problem solver.Prepare for your Google Interview: Tips and Example General Cognitive Ability Question
Here is the link.
How a candidate thinks
Leadership skills
Role-related knowledge
Googleyness - intellectual curiosity
Emerging leadership - how do you come out leadership at job? Take initiative, and
General cognitive ability - GCA interview, behavior interview, past behavior, sample interview question: what did you fail? tell me the time you fail? How to break complex problems into small solvable pieces.
What is a GCA interview?
Evaluation of your problem solving skills
Insight into your work style
Opportunity to talk through situations you may face at Google
3:03/ 11:02
What is Google assessing?
Understanding of the question
Preparation strategy
Ability to identify solutions
Justification for a specific solution
Communication
3:21/ 11:02
What is Google assessing?
Understanding of the question
Preparation strategy
Ability to identify solutions
Justification for a specific solution
Communication
4:16/ 11:02
How to build a strong response
Take a moment before responding
Ask clarifying questions
Share logical assumptions
Show your work
Consider the pros and cons
Think about how you measure success
Tie it back to the role
Thought process
Consider pros and cons
How to measure the success
specific to the role
- Example
Where is office?
Budget
How many people attend?
Assumptions 1, 2 and 3
thoughtful questions
Show your work
Communicate your solution
Measuring success
Sending out a post event survey
Candidate evaluation
. Did the candidate understand the question, including the basic problem?
. Did they ask clarifying questions?
. What relevant information, stakeholders, and variables were considered?
. Did the candidate identify multiple solution options?
. Were they able to reasonably justify why their solution was the best options?
. Did the candidate listen to incorporate any feedback/ hints from probing questions?
I have to work on this technique how to build strong response. I have to learn the framework to answer the question.
I still have problems to answer behavior question, and answer people's question.
How a candidate thinks
Leadership skills
Role-related knowledge
Googleyness - intellectual curiosity
Emerging leadership - how do you come out leadership at job? Take initiative, and
General cognitive ability - GCA interview, behavior interview, past behavior, sample interview question: what did you fail? tell me the time you fail? How to break complex problems into small solvable pieces.
What is a GCA interview?
Evaluation of your problem solving skills
Insight into your work style
Opportunity to talk through situations you may face at Google
3:03/ 11:02
What is Google assessing?
Understanding of the question
Preparation strategy
Ability to identify solutions
Justification for a specific solution
Communication
3:21/ 11:02
What is Google assessing?
Understanding of the question
Preparation strategy
Ability to identify solutions
Justification for a specific solution
Communication
4:16/ 11:02
How to build a strong response
Take a moment before responding
Ask clarifying questions
Share logical assumptions
Show your work
Consider the pros and cons
Think about how you measure success
Tie it back to the role
Thought process
Consider pros and cons
How to measure the success
specific to the role
- Example
Where is office?
Budget
How many people attend?
Assumptions 1, 2 and 3
thoughtful questions
Show your work
Communicate your solution
Measuring success
Sending out a post event survey
Candidate evaluation
. Did the candidate understand the question, including the basic problem?
. Did they ask clarifying questions?
. What relevant information, stakeholders, and variables were considered?
. Did the candidate identify multiple solution options?
. Were they able to reasonably justify why their solution was the best options?
. Did the candidate listen to incorporate any feedback/ hints from probing questions?
Actionable Items
I have to work on this technique how to build strong response. I have to learn the framework to answer the question.
I still have problems to answer behavior question, and answer people's question.
Top 10 favorite mock interviews in 2019
Dec. 15, 2019
Introduction
It is a good idea to find top 10 favorite mock interviews in 2019. I like to write down what I learn from the interviewee, and also I like to review the code as well.
Introduction
It is a good idea to find top 10 favorite mock interviews in 2019. I like to write down what I learn from the interviewee, and also I like to review the code as well.
Top 10 favorite algorithms in 2019
Dec. 15, 2019
It is hard for me to review algorithms in such short time. I decide to work on 24 hours count down. So I like to write a few blogs and work on a few topics. This one is top 10 favorite algorithms in 2019.
Introduction
It is hard for me to review algorithms in such short time. I decide to work on 24 hours count down. So I like to write a few blogs and work on a few topics. This one is top 10 favorite algorithms in 2019.
Top 10 favorite algorithms
24 hours count down
Dec. 15, 2019
I like to run a 24 hours count down project. I like to make a plan first and see how many things I can work on.
First thing I like to do is to go out, and spend time to walk around central park, and also do some grocery shopping.
Next thing is to start to review some algorithms and OO design, and then behavior interview questions.
I can think about going over all linked list algorithms, tree algorithms, graph algorithms.
Introduction
I like to run a 24 hours count down project. I like to make a plan first and see how many things I can work on.
24 hours count down
First thing I like to do is to go out, and spend time to walk around central park, and also do some grocery shopping.
Next thing is to start to review some algorithms and OO design, and then behavior interview questions.
I can think about going over all linked list algorithms, tree algorithms, graph algorithms.
SOLID principles
Dec. 15, 2019
Object-oriented programming is something I like to learn more. One thing I can review is about SOLID principle. Also I like to review the design question 1 + 2 * 3 and how the pattern is applied to solve the problem. I do not have a lot of time to review.
I spent over one hour to review the principles with an example. I like to look into how many more minutes I can spend on to review.
I am working on 24 hours count down to study.
Here is the link of SOLID principle from my blog.
Introduction
Object-oriented programming is something I like to learn more. One thing I can review is about SOLID principle. Also I like to review the design question 1 + 2 * 3 and how the pattern is applied to solve the problem. I do not have a lot of time to review.
My past blogs about 1 + 2 * 3
I spent over one hour to review the principles with an example. I like to look into how many more minutes I can spend on to review.
I am working on 24 hours count down to study.
Here is the link of SOLID principle from my blog.
Why I continue to attend HackerX event?
Dec. 15, 2019
It is such great learning experience for me. I attended the HackerX event on Dec. 10, 2019. I like to write a few things I learn through events.
Introduction
It is such great learning experience for me. I attended the HackerX event on Dec. 10, 2019. I like to write a few things I learn through events.
Three things I learned
Difference between RDBMS and HBase
Here is the article.
I like to read the following content, and then get an idea to search for better content. I like to find out why Facebook messenger system design from grokking system design argues that HBase should be used instead of relational database for messages.
I like to read the following content, and then get an idea to search for better content. I like to find out why Facebook messenger system design from grokking system design argues that HBase should be used instead of relational database for messages.
HBase –
HBase is a column-oriented database management system that runs on top of Hadoop Distributed File System (HDFS). It is well suited for sparse data sets, which are common in many big data use cases. It is an opensource, distributed database developed by Apache software foundations. Initially, it was named Google Big Table, afterwards it was re-named as HBase and is primarily written in Java. It can store massive amount of data from terabytes to petabytes. It is built for low-latency operations and is used extensively for read and write operations. It stores large amount of data in the form of tables.
HBase is a column-oriented database management system that runs on top of Hadoop Distributed File System (HDFS). It is well suited for sparse data sets, which are common in many big data use cases. It is an opensource, distributed database developed by Apache software foundations. Initially, it was named Google Big Table, afterwards it was re-named as HBase and is primarily written in Java. It can store massive amount of data from terabytes to petabytes. It is built for low-latency operations and is used extensively for read and write operations. It stores large amount of data in the form of tables.
Difference between RDBMS and HBase:
| RDBMS | HBASE |
|---|---|
| It requires SQL (structured query language) | NO SQL |
| It has a fixed schema | No fixed schema |
| It is row oriented | It is column oriented |
| It is not scalable | It is scalable |
| It is static in nature | Dynamic in nature |
| Slower retrieval of data | Faster retrieval of data |
| It follows the ACID (Atomicity, Consistency, Isolation and Durability) property. | It follows CAP (Consistency, Availability,Partition-tolerance) theorem. |
| It can handle structured data | It can handle structured, unstructured as well as semi-structured data |
| It cannot handle sparse data | It can handle sparse data |
Saturday, December 14, 2019
I said so many nos
Dec. 14, 2019
Introduction
It is hard for me to learn how to get most from my limited time after work, in weekends.
Say nos
I have to say so many nos to avoid time consuming activities.
I said so many nos to social event and vacation plan. I asked my friend to repair my rental condo in Florida in October 2019, and sent him a payment $300 US dollars. I did not want to fly to Florida and clean the kitchen and bathroom; I offered $850 dollars for rent even the market rate is $1200 US dollars. I like to spend less time to work on rental business and attract best renters as possible.
I learn that I only have limit time to spend on algorithm and data structure practice. Usually it is perfect time to work on the project since November and December is holiday season. I have to work on basics, make sure that I can strength the foundation and meet the challenge for another business year.
My journey to the fourth onsite in 2019
Dec. 14, 2019
Introduction
It is my personal finance research. I could not explain what is going on. I just did something so quickly and then I will have an onsite interview on Dec. 16, 2019 in the city of Vancouver.
My journey
I got a message from the recruiter from dialpad on Linkedin.com on Nov. 15, 2019. The recruiter was so friendly, he sent me a message in April 8, 2019. After six months, he sent me another message.
So I just followed up, and I had a chat with the recruiter on Nov. 21, I got a code screen on Nov. 21, and I worked on code screen on Dec. 1, 2019, and then I also got a phone screen on Dec. 10. So I will have an onsite on Dec. 16, 2019.
Mock interview weekday - My blessings
Dec. 14, 2019
Introduction
There are so many ways to find joy and happiness in the life. I just could not believe that working as an interviewer on interviewing.io in weekdays is such a blessing. Since I will have another onsite interview, I think that my interviewer experience is such a s great marketing tool for me to reach out community, and also I grow my technical skills as well. My blessings are growths of technical skills.
My mock interviews as an interviewer
From August to December, I spent over two months to ask interviewees on interviewing.io to work on word ladder - find all path algorithm. I worked with so many outstanding engineers, and then I have great time to master the algorithm.
When I slow down and learn something patiently from engineers all over the world, I am really the master to work on word ladder algorithm.
Dance tutorials
Dec. 14, 2019
It is my personal finance research. Today I had so much joy to watch dance tutorials, and I have great time to enjoy workout inside my home office.
Introduction
It is my personal finance research. Today I had so much joy to watch dance tutorials, and I have great time to enjoy workout inside my home office.
Dance tutorial
I like to watch those dance tutorials. I just could not believe that those videos are so good for me to learn, and I can have good workout to warm up my muscles, work on agility training.Career choice - taking risk
Dec. 14, 2019
It is time for me to write something encouraging myself to take risk. I met my friend last night, we went to Suspension bridge park together, and then we had dinner together. What we talked in dinner is so interesting, I like to bring up a topic how to make good career choice even when I am 53 years old.
I had chance to talk to my friend, and she asked me if I have experience to lead a big project. Can I do very good system design? How Facebook engineers work in the first three months? Every week the engineer in boot camp does a project.
They all are in 20s. How I can survive to work with them?
Another topic is to work for a startup company.
I learn that it is not easy for me to come out a clear idea what I should work on my career next move. Maybe I should stay on the same job, and then I become an expert on algorithm problem solver, I can finish 700 algorithms on Leetcode.com.
Introduction
It is time for me to write something encouraging myself to take risk. I met my friend last night, we went to Suspension bridge park together, and then we had dinner together. What we talked in dinner is so interesting, I like to bring up a topic how to make good career choice even when I am 53 years old.
The career talk conversation
I had chance to talk to my friend, and she asked me if I have experience to lead a big project. Can I do very good system design? How Facebook engineers work in the first three months? Every week the engineer in boot camp does a project.
They all are in 20s. How I can survive to work with them?
Another topic is to work for a startup company.
I learn that it is not easy for me to come out a clear idea what I should work on my career next move. Maybe I should stay on the same job, and then I become an expert on algorithm problem solver, I can finish 700 algorithms on Leetcode.com.
DDS wireless - 30 minutes study
Dec. 14, 2019
Introduction
I went to hackerX event, so I had chance to meet peopel from DDS wireless. I like to spend 30 minutes to follow up with some reading on Linkedin.com.
Introduction
I went to hackerX event, so I had chance to meet peopel from DDS wireless. I like to spend 30 minutes to follow up with some reading on Linkedin.com.
Skybox labs - skyboxlabs.com
Dec. 14, 2019
I went to hackerX event, so I had chance to meet people from Skybox labs. I like to write a blog and see what I should do to help myself to learn more about the company, technologies they used.
I like to explore linkedin.com and see how curious I am in terms of learning the new game industry. I also like to ask a few questions to look into more.
Introduction
I went to hackerX event, so I had chance to meet people from Skybox labs. I like to write a blog and see what I should do to help myself to learn more about the company, technologies they used.
30 minutes time to learn
I like to explore linkedin.com and see how curious I am in terms of learning the new game industry. I also like to ask a few questions to look into more.
3 Companies That Could Buy Netflix
Here is the article. I like to read the article, so I can understand how business works. Apple, AT & T and Comcast are three possible buyers.
Disney+ and Apple TV+ are certainly not making life any easier for Netflix, with single-digit monthly price points that make Netflix seem like a luxury instead of a necessity. Martin argues that Netflix should consider an ad-supported platform at roughly half of the platform's current price, but since Netflix has long argued that it's not going that route, Martin feels that the best course of action would be for the company to put itself up for sale. She realizes that there aren't too many companies that can afford to buy Netflix. It has an enterprise value of nearly $140 billion, and if you tack on a 30% premium to potentially sway Netflix, that pushes the price tag north of $180 billion.
Disney+ and Apple TV+ are certainly not making life any easier for Netflix, with single-digit monthly price points that make Netflix seem like a luxury instead of a necessity. Martin argues that Netflix should consider an ad-supported platform at roughly half of the platform's current price, but since Netflix has long argued that it's not going that route, Martin feels that the best course of action would be for the company to put itself up for sale. She realizes that there aren't too many companies that can afford to buy Netflix. It has an enterprise value of nearly $140 billion, and if you tack on a 30% premium to potentially sway Netflix, that pushes the price tag north of $180 billion.
Case study: Facebook messenger system design
Dec. 14, 2019
Introduction
It is my idea to study system design. I should learn the basics first, and then I should be able to come out good ideas to give a tech talk on system design interview.
Case study
I like to read the grokking system design lecture notes, and also take some notes as well.
Capacity estimation and constraints
500 million daily active users
average each user sends 40 message daily
total 20 billion message per day.
storage estimation:
average a message is 100 bytes, to store all the messages for one day, 2TB of storage
20 billion messages * 100 bytes => 2 TB/ day
To save five years of chat history, 3.6 petabytes of storage
2TB * 365 days * 5 years = 3.6 PB
Besides chat message, users' information, messages' metadata (ID, Timestamp, etc. )
Bandwidth estimation:
2 TB every day, 25 MB of incoming data for each second
2 TB/ 86400 sec ~= 25 MB/ s
same amount of bandwidth 25 MB/s for both upload and download.
Introduction
It is my idea to study system design. I should learn the basics first, and then I should be able to come out good ideas to give a tech talk on system design interview.
Case study
I like to read the grokking system design lecture notes, and also take some notes as well.
Capacity estimation and constraints
500 million daily active users
average each user sends 40 message daily
total 20 billion message per day.
storage estimation:
average a message is 100 bytes, to store all the messages for one day, 2TB of storage
20 billion messages * 100 bytes => 2 TB/ day
To save five years of chat history, 3.6 petabytes of storage
2TB * 365 days * 5 years = 3.6 PB
Besides chat message, users' information, messages' metadata (ID, Timestamp, etc. )
Bandwidth estimation:
2 TB every day, 25 MB of incoming data for each second
2 TB/ 86400 sec ~= 25 MB/ s
same amount of bandwidth 25 MB/s for both upload and download.
Apple stock - a short research
Dec. 14, 2019
I had a short road trip to Capilano suspension bridge park on Dec. 13, 2019, so I had chance to chat with my friend. She told me that Apple stock went up last year tremendously. I like to take a look.
I was so busy to learn as an investor starting from May 2019. I almost checked every day S & P 500 index. But what happened is that once I met my friend on Dec. 13, 2019, I learned that it is the first time I should pay attention to Apple stock as well.
May 2019 - Apple stock price is around $178.00 dollars.
Dec 2019 - Apple stock price is around $275 dollars.
The increase can be calculated 97/178 = 54%.
Introduction
I had a short road trip to Capilano suspension bridge park on Dec. 13, 2019, so I had chance to chat with my friend. She told me that Apple stock went up last year tremendously. I like to take a look.
Apple stock
I was so busy to learn as an investor starting from May 2019. I almost checked every day S & P 500 index. But what happened is that once I met my friend on Dec. 13, 2019, I learned that it is the first time I should pay attention to Apple stock as well.
May 2019 - Apple stock price is around $178.00 dollars.
Dec 2019 - Apple stock price is around $275 dollars.
The increase can be calculated 97/178 = 54%.
Memcached - Web Development
Here is the link.
2003 Danja -> LiveJournal
Facebook
Reddit
Youtube
Twitter
In-memory cache
key -> value
2003 Danja -> LiveJournal
Youtube
In-memory cache
key -> value
App Server Scaling - Web Development
Here is the link.
App server scaling
- process the request
-
App servers
user - server
load balancer - algorithms to use -
Load balancing algorithms
- random
- round robin
- load based
App server scaling
- process the request
-
App servers
user - server
load balancer - algorithms to use -
Load balancing algorithms
- random
- round robin
- load based
Scaling Databases - Web Development
Dec. 14, 2019
System design is like I give out tech talk on a topic given by the interviewer. What I like to do is to work on some basics again. One of my favorite is to watch udacity.com lecture notes.
Here is the link called scaling databases - web development.
Introduction
System design is like I give out tech talk on a topic given by the interviewer. What I like to do is to work on some basics again. One of my favorite is to watch udacity.com lecture notes.
Udacity - scaling databases
Here is the link called scaling databases - web development.
Episode 06: Intro to Architecture and Systems Design Interviews
Here is the link.
In this episode, I walk through the context and goals of a systems design and architecture interview. If you're considering working for a tech company, you'll almost certainly be asked to tackle a high-scale systems design problem. This video explains why companies ask this of you, how to prepare for this interview mentally and emotionally, and what success or failure might look like.
Here is the transcript.
I like to share my most favorite reading in the following:
At any point if you’re looking to your interviewer for guidance about how to proceed, you’re losing points. Now, don’t get me wrong on this point. Needing to bounce ideas off the interviewer or get clarification is fine. Also, you might be legitimately stuck on the problem. If so, by god man — ask for a pointer. I’ve seen many interviews that resulted in a job offer include feedback like “The candidate started off strong but needed a small pointer on X. After that, she did really well.” Don’t be afraid to ask for help. Still, you should bear in mind that the more help you need, the more likely it is that you’re showing lack of experience, creativity, and/or technical leadership.
Another no hire by a director level.
Mental math
When the interview feedback made it up to the director level, the director stopped us and rejected the candidate. I was confused. Turns out the director did some mental math that I didn’t have the foresight to do. Yes, the coding skills were good and the candidate was a reasonably good communicator, team player, etc.. However, he was lacking in design/architecture ability. This on it’s own is no failure, but the candidate had 8 years of industry experience. He had worked in a strongly technical company for that long without ever taking on enough leadership to get good at reasoning about large scale systems. That is a red flag.
If I have strong analysis how Google map works, I should expect myself to learn that offline map is a must. The user chooses a route to the destination, Google map does not automatically save the map in the memory. Driving direction is lost once the internet is not available.
In this episode, I walk through the context and goals of a systems design and architecture interview. If you're considering working for a tech company, you'll almost certainly be asked to tackle a high-scale systems design problem. This video explains why companies ask this of you, how to prepare for this interview mentally and emotionally, and what success or failure might look like.
Here is the transcript.
I like to share my most favorite reading in the following:
At any point if you’re looking to your interviewer for guidance about how to proceed, you’re losing points. Now, don’t get me wrong on this point. Needing to bounce ideas off the interviewer or get clarification is fine. Also, you might be legitimately stuck on the problem. If so, by god man — ask for a pointer. I’ve seen many interviews that resulted in a job offer include feedback like “The candidate started off strong but needed a small pointer on X. After that, she did really well.” Don’t be afraid to ask for help. Still, you should bear in mind that the more help you need, the more likely it is that you’re showing lack of experience, creativity, and/or technical leadership.
Another no hire by a director level.
Mental math
When the interview feedback made it up to the director level, the director stopped us and rejected the candidate. I was confused. Turns out the director did some mental math that I didn’t have the foresight to do. Yes, the coding skills were good and the candidate was a reasonably good communicator, team player, etc.. However, he was lacking in design/architecture ability. This on it’s own is no failure, but the candidate had 8 years of industry experience. He had worked in a strongly technical company for that long without ever taking on enough leadership to get good at reasoning about large scale systems. That is a red flag.
Actionable Items
I also think about a few mistakes I made in 2019; Google map offline story in Oct. 4, 2019, I spent over three hours to drive from Seattle downtown to Botholl, my friend's house.If I have strong analysis how Google map works, I should expect myself to learn that offline map is a must. The user chooses a route to the destination, Google map does not automatically save the map in the memory. Driving direction is lost once the internet is not available.
Design Dropbox | OneDrive like Services
Here is the link.
Requirements: User should be able to upload & download content It should sync with all devices for a user User should be able to share content User should be able to edit the content Extended: Should limit storage for non-premium user. Exposing the service through REST APIs Analytics: Recording different parameters Should maintain different versions of a file. API Creation: Database Design (Table creation) Logic to solve Problem System Workflow Load Balancer Caching Sharding Indexes Messaging Queue (Kafka) Hashing (Consistent Hashing) LRU Hadoop (HDFS) Cassandra Microservices This problem is similar to following: Dropbox Designing system, Dropbox components Design, How to design Dropbox, what is Dropbox, how Dropbox works, how Dropbox is implemented, Dropbox Implementation, Dropbox System design, Coding Simplified
18:00/ 20:46
Points to consider for system design
1. requirements
2. API creation
3. Database design (table creation)
4. Logic to solve problem
5. System workflow
6. Load balancer
7. Caching
8. Sharding
9. Indexes
10 Messaging queue (Kafka)
11. Hashing (Consistent hashing)
12. LRU
13. Hadoop (HDFS)
14. Cassandra
15. Microservices
Requirements: User should be able to upload & download content It should sync with all devices for a user User should be able to share content User should be able to edit the content Extended: Should limit storage for non-premium user. Exposing the service through REST APIs Analytics: Recording different parameters Should maintain different versions of a file. API Creation: Database Design (Table creation) Logic to solve Problem System Workflow Load Balancer Caching Sharding Indexes Messaging Queue (Kafka) Hashing (Consistent Hashing) LRU Hadoop (HDFS) Cassandra Microservices This problem is similar to following: Dropbox Designing system, Dropbox components Design, How to design Dropbox, what is Dropbox, how Dropbox works, how Dropbox is implemented, Dropbox Implementation, Dropbox System design, Coding Simplified
18:00/ 20:46
Points to consider for system design
1. requirements
2. API creation
3. Database design (table creation)
4. Logic to solve problem
5. System workflow
6. Load balancer
7. Caching
8. Sharding
9. Indexes
10 Messaging queue (Kafka)
11. Hashing (Consistent hashing)
12. LRU
13. Hadoop (HDFS)
14. Cassandra
15. Microservices
Major Lazer & DJ Snake - Lean On (feat. MØ) (Dance Tutorial) | Mandy Jiroux
Dec. 14, 2019
It is my Saturday. I spent whole day inside my home office. I spent time to read grokking system design. I need to take a break again.
Here is the link.
Introduction
It is my Saturday. I spent whole day inside my home office. I spent time to read grokking system design. I need to take a break again.
Lean on
Here is the link.
Case study: Design dropbox
Dec. 14, 2019
It is challenging to be pragmatic learner to be a system designer. What I like to do is to review notes from grokking system design, and write down some notes to design dropbox.
I like to take some time to write notes for designing dropbox.
Requirements for the system:
1. users should be able to upload and download their files/ photos from any device.
2. users should be able to share file or folders with other users.
3. support automatic synchronization between devices
4. file can be up to a GB.
5. ACID-ity is required. Atomcity, consistency, isolation and durability of all file operations should be guaranteed.
6. offline editing. offline editing, once online, the change should be synced.
Extended requirement
Design consideration
files can be stored in small parts or chunks (say 4MB), this can provide a lot of benefits.
Capacity estimation and constraints
. 500M total users, and 100M daily active users
. on average each user connects from there different devices.
. on average if a user has 200 files/photos, we will have 100 billion total files.
. average file size is 100 KB, total storage is 100B * 100KB => 10 PB
. one million active connections per minute
Introduction
It is challenging to be pragmatic learner to be a system designer. What I like to do is to review notes from grokking system design, and write down some notes to design dropbox.
Case study
I like to take some time to write notes for designing dropbox.
Requirements for the system:
1. users should be able to upload and download their files/ photos from any device.
2. users should be able to share file or folders with other users.
3. support automatic synchronization between devices
4. file can be up to a GB.
5. ACID-ity is required. Atomcity, consistency, isolation and durability of all file operations should be guaranteed.
6. offline editing. offline editing, once online, the change should be synced.
Extended requirement
Design consideration
files can be stored in small parts or chunks (say 4MB), this can provide a lot of benefits.
Capacity estimation and constraints
. 500M total users, and 100M daily active users
. on average each user connects from there different devices.
. on average if a user has 200 files/photos, we will have 100 billion total files.
. average file size is 100 KB, total storage is 100B * 100KB => 10 PB
. one million active connections per minute
High level design
Block servers will work with clients to upload/download files from cloud storage, and Metadata servers will keep metadata of files updated in a SQL or NoSQL database. Synchronization servers will handle the workflow of notifying all clients about different changes for synchronization.
client -> block server, metadata server, synchronization server -> cloud storage, metadata storage
client -> block server, metadata server, synchronization server -> cloud storage, metadata storage
Component design
thing I learned and like to share here is the question:
How can clients efficiently listen to changes happening on other clients?
client periodically check with the server / HTTP long polling.
a. client
- internal metadata database
- chunker
- Watcher
- indexer
b. Metadata database
Metadata database should store those information: chunks, files, user, devices, workspace (sync folders)
c. Synchronization service
d. Message queuing service
client -> request queue -> synchronization service -> metadata DB
<- response queue
Message Queuing Service
3. Cloud/ Block storage
web client - notification server - synchronization queue - metadata servers - load balancers - block server <- metadata DB -> Metadata cache server, storage cache server - block/ cloud storage
Metadata partitioning
1. vertical partitioning
2. range based partitioning
3. hash-based partitioning
Caching
Load balancer
David Guetta - Hey Mama ft. Nicki Minaj & Afrojack (Dance Tutorial) | Mandy Jiroux
Dec. 14, 2019
It is such a challenge dance since I have to lower down my body lower to knew, and then I also need to work on swing of my arms. Such a good workout. I enjoy the practice.
Here is the link.
Introduction
It is such a challenge dance since I have to lower down my body lower to knew, and then I also need to work on swing of my arms. Such a good workout. I enjoy the practice.
Here is the link.
eghan Trainor - Lips Are Movin (Dance Tutorial) | Mandy Jiroux
Dec.14, 2019
It is like self-examination. Through dance moves, I have chance to examine so many muscles, joints and bones and see which ones not functions very well. I also notice that my obese weight and its side effects. I need more exercise in short future.
Here is the link.
Introduction
It is like self-examination. Through dance moves, I have chance to examine so many muscles, joints and bones and see which ones not functions very well. I also notice that my obese weight and its side effects. I need more exercise in short future.
Learn one more dance moves
Here is the link.
Little Mix - Salute (Dance Tutorial) | Mandy Jiroux
Dec. 14, 2019
It is very good practice for a small home office. I like to have warmup to work on my flexbilities. Last year I had shoulder issue the first time in my life, I could not lift the right arm close to my head. I recovered after more than three months sports - tennis.
Here is the link.
Introduction
It is very good practice for a small home office. I like to have warmup to work on my flexbilities. Last year I had shoulder issue the first time in my life, I could not lift the right arm close to my head. I recovered after more than three months sports - tennis.
One more choreography - dance tutorial
Here is the link.
Mark Ronson - Uptown Funk ft. Bruno Mars (Dance Tutorial) | Mandy Jiroux
Dec. 14, 2019
It is a dance tutorial and I found out that it is a very good warmup indoor before I take a walk, go out to swim or play tennis.
Here is the link.
Introduction
It is a dance tutorial and I found out that it is a very good warmup indoor before I take a walk, go out to swim or play tennis.
Here is the link.
Friday, December 13, 2019
Spend time with a friend attending conference AI in Vancouver
Dec. 13, 2019
I like to work on a project to tour the city of Vancouver. My plan is to go out to meet my friend at 3:00 PM, and then drive to Cypress mountain sightseeing viewpoint, and then go to west Vancouver for dinner at whole food store, and then go to capilano suspension bridge to see Christmas lights.
Introduction
I like to work on a project to tour the city of Vancouver. My plan is to go out to meet my friend at 3:00 PM, and then drive to Cypress mountain sightseeing viewpoint, and then go to west Vancouver for dinner at whole food store, and then go to capilano suspension bridge to see Christmas lights.
How to make a plan?
Rush to work on system design preparation
Dec. 13, 2019
It is so important for me to spend time regularly to work on system design study. I had Facebook and Amazon onsite in August 2019, but after that, I do not spend time regularly on study of system design. I have hard time to manage time and push myself to learn better on system design. Now I have three days to prepare until next Monday. I like to learn something, learn better this time.
What can I contribute to the community to learn better about system design? Where should I write and submit my study and understanding the importance of system design, large distributed system how to make it work first and work better?
Introduction
It is so important for me to spend time regularly to work on system design study. I had Facebook and Amazon onsite in August 2019, but after that, I do not spend time regularly on study of system design. I have hard time to manage time and push myself to learn better on system design. Now I have three days to prepare until next Monday. I like to learn something, learn better this time.
System design
What can I contribute to the community to learn better about system design? Where should I write and submit my study and understanding the importance of system design, large distributed system how to make it work first and work better?
Thursday, December 12, 2019
我怎样把独处时间变为 个人成长的机会 内向还是外向更快乐？Solititude And Hapiness 人生 心理学
Here is the link.
It is such a great video. I like her analysis about asking a friend to return money if he borrowed the money but he does not like to return. How to think and analyze the friendship?
该书链接 ： https://amzn.to/2QG9OiD 人需要独处的时间来思考自己的生活，从而得到个人成长的机会。但独处的时间太多会让人不快乐，太少则会错过反思，从而成长的过程。如何顺应宇宙法则的心理学，获得正能量的人生。
1.专注自己喜欢的积极事情 2.反思生活，了解自己 3.如何过滤信息 4.独处，注意力的休息 ，冥想 ，轻音乐 5.吃健康的食物
It is such a great video. I like her analysis about asking a friend to return money if he borrowed the money but he does not like to return. How to think and analyze the friendship?
该书链接 ： https://amzn.to/2QG9OiD 人需要独处的时间来思考自己的生活，从而得到个人成长的机会。但独处的时间太多会让人不快乐，太少则会错过反思，从而成长的过程。如何顺应宇宙法则的心理学，获得正能量的人生。
1.专注自己喜欢的积极事情 2.反思生活，了解自己 3.如何过滤信息 4.独处，注意力的休息 ，冥想 ，轻音乐 5.吃健康的食物
Actionable Items
Flow: The Psychology of Optimal Experience (Harper Perennial Modern Classics)
Psychologist Mihaly Csikszentmihalyi's famous investigations of "optimal experience" have revealed that what makes an experience genuinely satisfying is a state of consciousness called flow. During flow, people typically experience deep enjoyment, creativity, and a total involvement with life. In this new edition of his groundbreaking classic work, Csikszentmihalyi demonstrates the ways this positive state can be controlled, not just left to chance. Flow: The Psychology of Optimal Experience teaches how, by ordering the information that enters our consciousness, we can discover true happiness and greatly improve the quality of our lives.
Write-ahead logging
Here is the wiki article I like to read again.
I read the book design large data intensive application, and one of the topic is about logging. How the logging is used to design Kafka and support distributed system like database, keep ACID properties. But what I do not remember is that every transaction in database is to use write-ahead logging to allow undo/ redo feature.
By checking the log, or put transaction into log first, it is easy to do, but also a good design to keep database table record ACID.
I read the book design large data intensive application, and one of the topic is about logging. How the logging is used to design Kafka and support distributed system like database, keep ACID properties. But what I do not remember is that every transaction in database is to use write-ahead logging to allow undo/ redo feature.
By checking the log, or put transaction into log first, it is easy to do, but also a good design to keep database table record ACID.
My mistake - Start too late to study Investment until 53 years old
Dec. 12, 2019
It is my personal finance research. I started to learn how to invest from May 2019, and I have invested over hundreds of hours in my life the first time. I like to conduct a short research to review my personal experience from 2001 to 2019. Why do I wait so long to start my research on money and investment?
I can estimate that only 401 K and IRA alone costed me over $50,000 US dollars at least, since I invested into 401 K and IRA starting from 1998, and only 2010 to 2019 S & P 500 index 300% increase alone, the opportunity cost is above $60,000.
I spent hundreds of hours to learn personal finance starting from November 2018, I chose to work on my financial problem, after six months, I started to watch how to invest videos on youtube.com. First time I spent time to watch how Warren Buffet invests and his philosophy called value investing.
I just fell in love with my new research area called investment.
Introduction
It is my personal finance research. I started to learn how to invest from May 2019, and I have invested over hundreds of hours in my life the first time. I like to conduct a short research to review my personal experience from 2001 to 2019. Why do I wait so long to start my research on money and investment?
Mistakes costs me thousands dollars
I can estimate that only 401 K and IRA alone costed me over $50,000 US dollars at least, since I invested into 401 K and IRA starting from 1998, and only 2010 to 2019 S & P 500 index 300% increase alone, the opportunity cost is above $60,000.
My strength and weakness
I just fell in love with my new research area called investment.
Polling vs SSE vs WebSocket— How to choose the right one
Dec. 12, 2019
It is my favorite article to read, and I spent over an hour to read.
I like to ask questions, and also read out loud, so that I can understand the topic better.
Here is the article.
I also like to write down my thought process. I still remembered that I failed onsite interview question from Fortinet this May 2019, if a web page has submit button, what happen if the button is clicked twice quickly?
I really like to read more carefully, and most important I should pay attention to those terms, ajax polling, long term polling, and what is TCP and how many connections stay open?
Introduction
It is my favorite article to read, and I spent over an hour to read.
Reading is fastest way to learn
I like to ask questions, and also read out loud, so that I can understand the topic better.
Here is the article.
two general approaches: client pull or server push.
A few ways to implement these:
- Long/short polling (client pull)
- WebSockets (server push)
- Server-Sent Events (server push)
Actionable Items
I also like to write down my thought process. I still remembered that I failed onsite interview question from Fortinet this May 2019, if a web page has submit button, what happen if the button is clicked twice quickly?
I really like to read more carefully, and most important I should pay attention to those terms, ajax polling, long term polling, and what is TCP and how many connections stay open?
Prepare for Your Google Interview: Systems Design
Here is the link.
Googlers share targeted advice for the systems design aspects of Google's interview process for technical and engineering candidates. This video will cover tips for communication, designing to scale, trade-offs and compromises, overall best practices, and more! Skip ahead to: 0:38 - Communication 1:31 - Designing to Scale 2:49 - Concrete and Quantitative Solutions 3:38 - Trade-offs and Compromises 4:18 - Best Practices
Designing to Scale
Questions to keep in mind:
. how can we tell that the system is working
. Is there a bottleneck in the design?
. How do the components work together?
. How do we provide great service to everyone?
System properties:
. Latency
. Throughput
. Storage
Costs of operations:
. Read from disk
. Read from memory
. Local area network (LAN) round-trip
. Cross-continental network
Solution patterns:
. Sharding data
. Replication types
. Write-ahead logging
. Separating data and metadata storage
. Load distribution
Best practice
Explain
Clarify
Improve
Practice
Create for every one, design for every one
Googlers share targeted advice for the systems design aspects of Google's interview process for technical and engineering candidates. This video will cover tips for communication, designing to scale, trade-offs and compromises, overall best practices, and more! Skip ahead to: 0:38 - Communication 1:31 - Designing to Scale 2:49 - Concrete and Quantitative Solutions 3:38 - Trade-offs and Compromises 4:18 - Best Practices
Designing to Scale
Questions to keep in mind:
. how can we tell that the system is working
. Is there a bottleneck in the design?
. How do the components work together?
. How do we provide great service to everyone?
System properties:
. Latency
. Throughput
. Storage
Costs of operations:
. Read from disk
. Read from memory
. Local area network (LAN) round-trip
. Cross-continental network
Solution patterns:
. Sharding data
. Replication types
. Write-ahead logging
. Separating data and metadata storage
. Load distribution
Best practice
Explain
Clarify
Improve
Practice
Create for every one, design for every one
Actionable items
Follow up on Oct. 5, 2020
Plan to work on solution patterns. Start from sharding data, replication types, write-ahead logging, separating data and metadata storage, and load distribution.
Questrade 2019 tax file application
Dec. 12, 2019
It is my personal finance research. I have to learn all kinds of documents as an investor. Since I am 53 years old, I can no longer take risk to wish making money without learning first. I got the document to read and like to write about it.
Introduction
It is my personal finance research. I have to learn all kinds of documents as an investor. Since I am 53 years old, I can no longer take risk to wish making money without learning first. I got the document to read and like to write about it.
Questrade 2019 tax file application
Learn the Transforming Power of Principles
Here is the link.
I like to study one more person who likes to share what books to read. I really like to work on my English vocabulary and my understanding of life and spiritual life, specially after I turned 53 years old, and tried to understand so many dangers ahead in terms of personal health, financial difficulties. I really like to be a learner, and push myself to work hard, stay on track in this internet age.
I like to study one more person who likes to share what books to read. I really like to work on my English vocabulary and my understanding of life and spiritual life, specially after I turned 53 years old, and tried to understand so many dangers ahead in terms of personal health, financial difficulties. I really like to be a learner, and push myself to work hard, stay on track in this internet age.
Wednesday, December 11, 2019
Book Review: The Road Less Traveled
Here is the link.
Check out my Online Book Club and other awesome learning opportunities for you at: http://audreyrindlisbacher.com/! The Road Less Traveled by M. Scott Peck is controversial with good reason; Peck struggled to live what he taught and went on to write things that some consider heresy. But in The Road Less Traveled we find a younger, more balanced man seeking truth and often, in our opinion, hitting upon it. Peck wants to show us the connection between our psychological and spiritual health and we believe there truly is an important interdependence there. As with any valuable book, we recommend you read it for yourself, embrace the truth you find and discard the rest.
Check out my Online Book Club and other awesome learning opportunities for you at: http://audreyrindlisbacher.com/! The Road Less Traveled by M. Scott Peck is controversial with good reason; Peck struggled to live what he taught and went on to write things that some consider heresy. But in The Road Less Traveled we find a younger, more balanced man seeking truth and often, in our opinion, hitting upon it. Peck wants to show us the connection between our psychological and spiritual health and we believe there truly is an important interdependence there. As with any valuable book, we recommend you read it for yourself, embrace the truth you find and discard the rest.
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