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  • VMware Virtual Volumes Deep Dive

    Oct 24, 2014 vvols vsphere
    VMware Virtual Volumes Deep Dive

    How vVols Will Help The constraints and issues which VVOLs address include, LUNs introduce constrains such as the quantity of LUNs we can present, having lots of LUNs each with unused space is in efficient as such we currently shared VMs on data stores and this gives a lack of granular control for passing storage …

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  • NetApp FAS IOPS Theoretical Maximum & Workload Aggregate Load Balancing

    Aug 26, 2014 netapp performance
    NetApp FAS IOPS Theoretical Maximum & Workload Aggregate Load Balancing

    To achieve good performance for a virtualized workload your Storage Area Network (SAN) should deliver high IOps with a predictable low latency. If you are using a good flash system where IOps (Input/Output Operations Per Second) effectively become an unlimited resource then latency will probably be your limiting …

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  • Scrum Team Demystified

    Aug 26, 2014 devops
    Scrum Team Demystified

    While I worked with Agile as a software tester when the concept first came out in 2002 shortly afterwards I joined a new company in a new role in Infrastructure, IT operations if you will. My recollection of Agile is that it was not a process at all; rather, it’s a set of principles summarized by the Agile Manifesto. …

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  • Optimal TCP Window Size For Long Distance WAN Link

    Jul 24, 2014 tcp
    Optimal TCP Window Size For Long Distance WAN Link

    If you have a requirement to copy large amounts of data along way around the world you may find that despite your link being 60Mb/s if its 5,000 miles away you only can transfer files at much less like 10Mb/s. The cause of this is generally the TCP Window Size is optimized by OS and FTP clients by default to work on …

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  • Setup Hanlon

    Apr 4, 2014 hanlon
    Setup Hanlon

    Since the company I work for CSC got a new CEO then CTO its changed direction and the latest change has been to participate with the Open Source community. With this news shortly followed an updated version of a tool our new CTO Dan Hushon worked on at EMC with Nicholas Weaver it was formerly called Razor and the new …

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  • HP C7000 Interconnect Bay Mapping

    Mar 27, 2014 hpe
    HP C7000 Interconnect Bay Mapping

    Here I address the most common query people have when using HP C7000 chassis, namely how do the bay mappings work. Half Height Blades HP supply blades which occupy single or double slots, the single height blades map in the following way. Device Interconnect Bay Mapping OnBoard NIC1 Bay 1 OnBoard NIC2 Bay 2 Mezz1 HBA1 …

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  • Windows Server 2012 - SAN Performance

    Mar 3, 2014 windows performance
    Windows Server 2012 - SAN Performance

    In a newly deployed Windows Server 2012 HyperV environment with around sixty nodes, running a couple of hundred Windows Server 2012 virtual machines running various applications. We found the EMC VMX storage which underpinned this became massively busy with Write IO at around 3am, the Write IO was mostly coming from …

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  • Configuring Puppet

    Sep 23, 2013 puppet
    Configuring Puppet

    I’m a traditional wintel vmware engineer working in the UK in a team focusing on platform configuration automation for virtual and physical Windows hosted solutions. This video of how Puppet can be used to manage Amazon EC2. Shortly after watching this VMware Hybrid Cloud Services launched and on watching …

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Darryl Cauldwell

Technologist, perpetual student, teacher, continual incremental improvement.
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