qcow2 snapshots - cpu load impact ?

[immo]

Does anybody know how much load or impact a snapshot has on read/write performance and cpu power ? We try to convince the users not to use snapshots if possible and not a cascaded structure of snapshots but we dont have external knowledge to overrule their ... we need this to perform

 

[Alwin]

This needs to be measured. But with a growing snapshot, on writes, it needs to check the snapshot and update the references. This will introduce latency and use more resources. So to say, more snapshots, the slower it will get.