Snapshots/Checkpoints cause increased IO penalties, reducing performance.Snapshots/Checkpoints make the original virtual disk a read-only file, and all changes from the snapshot/checkpoint creation point forwards are saved to a ‘delta’ virtual disk.If you need bringing up to speed as to why we don’t like snapshots/checkpoints sticking around, here’s the non-exhaustive, good to know key points: Why Snapshots/Checkpoints are bad in the long-term Or should I say, it’s a painful situation, ONCE you notice! And IF you don’t, you have a disaster approaching. Whatever the reason, it’s a painful situation. Have you ever seen a snapshot/checkpoint fail to merge? Maybe VMware vSphere was telling you that a virtual machine required consolidation, or Microsoft Hyper-V reported that the checkpoint couldn’t be merged.
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