how did I pass the CKA exam
DescriptionI took the CKA exam and got the score of 97 out of 100.
The exam is 2 hours and I finished the exam by just 1 hour.
In this article, I will
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basic paxos execution flow examples
BackgroundThe paper of Paxos Made Simple and the video of implementing replicated logs with paxos are very good materials for learning Paxos.
It is no
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java service issue investigation
CPUtop123ps aux |grep javatop -H -p pid # -H : check threads cpu usagetop # check processes cpu usage
MEMORYfree1234free -m total
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hadoop mapreduce job execution flow in detail
DescriptionIn this blog, we will look into the execution flow of hadoop mapreduce job (word count) in detail.
Word count job is simple and straightfor
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run work count by hadoop 3 and debug hadoop by eclipse in mac
descriptionIn the previous blog, we discussed about how to compile hadoop 3 from the source code and import source code into Eclipse.
As one step of t
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build hadoop 3 trunk branch and import into eclipse in mac
DescriptionI tried to build the trunk branch of hadoop git repository and imported it into eclipse then resolved the issues.The date I did it is 2019/
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how oracle java license change affect users
Oracle javaplatformsoracle java has 3 platforms, Java SE for standard usage, Java EE for enterprise usage, and Java ME for micro usage.They are all sp
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how to pass AWS Solutions Architect Associate Exam
BackgroundI passed the AWS solutions architect assciate exam today, and I would like to share some knowledge for people who want to prepare for the ex
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resilient architecture should also consider hard shutdown
graceful shutdown and hard shutdownWhen a program/service is shutdown unexpectedly, it may be graceful shutdown or hard shutdown.When a service is kil
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YARN UI detailed explanation
DescriptionYARN UI url is {hadoop_master_ip:8088}. There is a lot of information in this UI as follows which is very helpful for analyzing issues. Thi
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