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• StoredCacheData.
• binary_meta.
• marshaller.

must be properly prepared and saved during snapshot.

Restore

Prerequisites:

• Restored data region is empty - there are no any caches stored in it.
• Count of nodes in cluster are the same as in time of creation (this restriction can be eliminated in Phase 2 of IEP implementation).
• All nodes in cluster has snapshot locally.

Steps:

1. Block data region exclusively on each node - any attempt of usage (cache creation) must be blocked.
2. Restore all saved data into data region.
3. Restore all saved metadata.
4. Wait all nodes complete step 2 and 3.
5. Start caches that belongs to restored data region.

Risks and Assumptions

• 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.  

Discussion Links

// Links to discussions on the devlist, if applicable.

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