Recent Posts

Extending an EagerZeroedThick Disk

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Here is something which came my way via an observation made by one of our customers (thanks Guido). When extending a VMDK which is EagerZeroedThick, the extended part is only LazyZeroed. Its probably easier to explain using the following example.   Step1 – Create an EagerZeroedThick VMDK: ~ # vmkfstools -c 2g -d eagerzeroedthick /vmfs/volumes/cs-ee-symmlun-001A/cormac.vmdkCreating Read more...

vSphere 5.0 U1 now supports routed NFS storage access

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I have to admit, I missed this in the release notes when we initially brought out 5.0U1. But it is rather neat that we now support routing NFS traffic. There are some caveats however. From the release notes: vSphere 5.0 Update 1 supports L3 routed NFS storage access when you ensure that your environment meets Read more...

Oldies, but goodies – Site Recovery Manager Setup Videos

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I recently stumbled across a bunch of recordings that I made for the VMware KBTV channel some time ago. If you are looking for a short overview on how to configure SRM with some different storage arrays and replication technologies, or how to use some SRM features like shared recovery site or the DR IP Read more...

NFS Block Sizes, Transfer Sizes & Locking

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Posted by Cormac HoganTechnical Marketing Architect (Storage) I've had a few questions recently around the I/O characteristics of VMware's NFS implementation. I'm going to use this post to answer the common ones.   NFS Block Sizes  The first of these questions is usually around the block size used by NFS. The block size on NFS Read more...

New vSphere Storage Appliance (VSA) Whitepapers now published

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Hi all, A quick post today to let you know that VMware has just published some new performance whitepapers on the vSphere Storage Appliance. The performance evaluations were carried out by Principled Technologies with a view to measuring real-life workloads on the VSA. One looks at the performance with a RAID-5 configuration, the other looks Read more...

A closer look at the View Storage Accelerator [incl. Video]

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A whole bunch of blog posts have appeared recently around the new View Storage Accelerator in VMware View 5.1, including my own introduction here. I think this goes to show how much excitement there is around these new features. In this post, I wanted to share some more detail around the Storage Accelerator. The Storage Read more...

VMFS Locking Uncovered

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Posted by Cormac HoganTechnical Marketing Architect (Storage) In one of my very first blog posts last year around the new improvements made to VMFS-5 in vSphere 5.0, one of the enhancements I called out was related to the VAAI primitive ATS (Atomic Test & set). In the post, I stated  that the 'Hardware Acceleration primitive, Read more...

New Storage Features in VMware View 5.1

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VMware's flagship VDI product, VMware View, has a new release coming out. I don't normally blog about EUC (End User Computing) or VDI as it is not my area of expertise. However VMware View 5.1 has a number of really neat new storage related features which are making use of enhancements which were first introduced Read more...