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  • Virtualization 1 of 4 – Hypervisor

    In broad terms, virtualization of computing resource is about isolation of resources, at different levels. There are five levels of virtualization: In my context I…

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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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  • EMC Isilon storage product

    EMC has several product lines for different use cases in enterprise data storage. Like may other IT solutions, the website is clouded with marketing terms…

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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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  • Capture filter and Display filter in Network Analyzer

    Capture filter is set before collecting packets. It is applied at the time of data acquisition and it impacts the size of the capture. It…

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  • Networking Basics 3 of 3 – common network protocols and technologies

    The 5 layer TCP/IP model (or its more rigorously defined alternative OSI model) leads to a whole world of network protocols. Understanding these new protocols…

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