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  • Log file navigator (lnav)

    I’ve used a number of log viewers in command terminal, on MacOS and Linux server. I read system logs, log4j formats, as well as json…

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  • Kafka high-level Overview

    Zookeeper General definition of distributed system: a software system that is composed of independent computing entities linked together by a computer network whose components communicate…

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  • How RPC and NFS work

    I touched on NFS in several previous postings, and here is a deeper dive of this particular protocol. NFS is built on top of Remote…

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  • Performance Analysis

    Overview In 2015, Brendan Gregg posted two great articles on Netflix blog: Linux Performance Analysis in 60 seconds, and Linux Perfomrance Tools. They have great…

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  • Setup WSL2 (and Docker) on Windows 10

    This is not for Linux snobs, but rather for those who are stuck with a Windows work laptop, have to deal with Linux on a…

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  • Balloon steals memory from virtual machines

    This article is my experience with memory balloon on virtual machine. I came across an ElasticSearch server (ESXi guest with 32GB physical memory) where the…

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