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• DataRegionConfiguration#persistenceEnabled=false  for in-memory caches by the definition.
• The same value must be for DataRegionConfiguration when cache group restored from in-memory snapshot.
• After this feature implemented PageIO will require to be backward compatible.
• The way to restore snapshot on different topology must be further investigated.
• Empty pages of DataRegion will be written to snapshot.
• Compaction of snapshot must be further investigated.
• Consistent per-entry snapshot that will be implemented in this IEP can be created for persistence caches also.
• API to iterate, transform, print snapshot content is out of scope and must be created in other IEPCompaction of snapshot must be further investigated.

Phases scopes

• Phase 1
  • snapshot creation.
  • restore snapshot on the same topology.
  • control utility integration.
• Phase 2
  • restore snapshot on different topology.
• Phase 3
  • snapshot compactification.

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