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vSphere 5.5 UNMAP Deep Dive

Jason Boche of  comments:

One of the features that has been updated in vSphere 5.5 is UNMAP which is one of two sub-components of what I’ll call the fourth block storage based thin provisioning VAAI primitive (the other sub-component is thin provisioning stun).   I’ve already written about UNMAP a few times in the past.   It was first introduced in vSphere 5.0 two years ago.   A few months later the feature was essentially recalled by VMware.   After it was re-released by VMware in 5.0 Update 1, I wrote about it’s use here and followed up with a short piece about the .vmfsBalloon file here.

A nice long look at a new vSphere 5.5 storage feature that should help make things run a bit more smoothly.

Read more at: vSphere 5.5 UNMAP Deep Dive

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Tom Hollingsworth

Tom Hollingsworth is a networking professional, blogger, and speaker on advanced technology topics. He is also an organizer for networking and wireless for Tech Field Day.  His blog can be found at

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