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tinto1970
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Impressions about snapshot removal in vSphere 6

Post by tinto1970 »

Hi folks,

as discussed in Gostev's weekly email, the new snapshot removal process introduces in vSphere 6 is a great change. And it so good in reducing stuns on VMs during the process.

But, it's just an impression... (if i knew about the change i would have tried to pick up some numeric data "before and after" upgrade) i've noticed that the process has greater impact on storage systems holding VMs data.

In particular case, i have some NFS datastores on NetApp filers which are heavily loaded: when removing snapshots, the IOPS increase a lot and the CPU usage grows up quite high, much more than before.
I.E.: a VM which is around 600 GB, approx 8 hours snapshot had this activity during removal: cpu% on storage, iops and latencies on datastore

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dellock6
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Re: Impressions about snapshot removal in vSphere 6

Post by dellock6 »

Actually, we measured the time needed to be completed, which is the main cause of the stun as the vm is not responding for a longer time.
Just my guess, maybe the process now is more efficient so it's able to push the storage more, thus the values you are seeing.

Luca
Luca Dell'Oca
Principal EMEA Cloud Architect @ Veeam Software

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tinto1970
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Re: Impressions about snapshot removal in vSphere 6

Post by tinto1970 »

yeah, better to consider this when buying new hardware ;)
Alessandro aka Tinto | VMCE 2024 | Veeam Legend | VCP-DCV 2023 | VVSPHT2023 | vExpert 2024
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