![]() If the time to consolidate the helper is within a certain time-frame (12 seconds), we stunned the VM and consolidated the helper snapshot into the base disk. It could be that this helper snapshot has grown considerably during the consolidate operation. Once the original chain is consolidated, we then did a calculation to see how long it would take to consolidate the helper snapshot. What we did previously is used a helper snapshot, and redirected all the new I/Os to this helper snapshot while we consolidated the original chain. ![]() ![]() In fact, there are situations where the snapshot consolidation operation could even fail if there is too much I/O. Many of you will be aware of the fact that when they VM is very busy, snapshot consolidation may need to go through multiple iterations before we can successfully complete the consolidation/roll-up operation. It seems that we have made a major improvement to the way we do snapshot consolidation in vSphere 6.0. This is something I only learnt about very recently, and something I was unaware of. ![]()
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