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HBernhard
Contributor
Contributor

performance problem with "migrate"

Hi,

I have a big problem with my VSphere /ESXi Server (4.1). I would like to migrate a lot of VMs with the context menu „migrate“ from one datastore to another (the datastores are on different storage systems). For VMs without snapshots the performance is nice and i can write with up to 200MB/s on disk. But i have a lot of VMs with snapshots and the performance for these is extremely bad with 5MB/s.

Any idea to fix that is highly appreciated.

Thanks in ahead

Bernhard

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peter79
Enthusiast
Enthusiast

Well the "fix" is to commit the snapshots before you carry out a storage vMotion.

However the important question is do you have a lot of snapshots per VM, and what are the purpose of these snapshots?

Snapshots should only be kept for a very short period of time (unless your talking about a dev or test environment).  Sanpshots can potentially be as big as the VM itself and if you have multiple snapshots on a VM its no surprise the vMotion is taking so long.

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HBernhard
Contributor
Contributor

hi,

i have a test environment and the snapshots contains diferent Builds of our software.

What did you mean with "commit the snapshots"? how can i do this?

Thanks

Bernhard

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peter79
Enthusiast
Enthusiast

Right click one of the VM's and select snapshot manager.  Select the snapshot and click delete.  If you have multiple sanpshots.  Go to the last one and select delete all.

Take note that if you are talking about a big snapshot or multiple snapshots the committing could take a long time.  The problem with snapshots is that if you don't keep an eye on your storage can be consumed by them and then your really trouble.

Its fine using them for dev/test purposed but I would recommend them sparingly in production.

HBernhard
Contributor
Contributor

oh, i alredy treyed this. to deleat all snapshots works fine but this is no options for me.

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peter79
Enthusiast
Enthusiast

Could you provide some screenshots?

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HBernhard
Contributor
Contributor

hi,

i created a VMWare support request. they told me the same.

I moved the VMs with snapshots by browsing the datastrore and copying it to the new one.

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