Snapshot causing Server disconnection.

[Neil122]

Hi,

I am wondering if anyone has seen this before, whenever I take a snapshot of a machine the machine in question drops until about 30% of the snap has completed, sometimes it can take longer depending on the server, this is obviously a problem when we have live machines that need to stay online but we still need to work on them.

we are running

vCenter Server 6.0.0 Build 3634793

[abhilashhb]

Is this part of a backup cycle?

During the process of snapshot, the I/Os are quiesced and are redirected to a delta disk. This will cause issues if the load on machine is high. Why not do it off hours? Or when the load is lesser?

I have also seen this happen if the vCenter and the machines under it are being backed up at the same time. 

[Neil122]

No its not part of the backup cycle as we do not use snapshots for backups just for changes that we need to make to live servers, I have used Vmware for a while but I have never seen this before.

[linotelera]

Hi

I saw similar behavior in VM with huge capacity and high I/O rate in vSphere 4. Snapshotting could have performance impacts due the disk I/O increasing.

Please could you post further informations like performance chart during this operation? Is your physical infrastructure healthy? What about vmware-tools running and version?