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Restore snapshot (automatic)

Restore cache group(s) from the snapshot on the active cluster

We need to provide the ability to restore individual cache groups from an existing snapshot on an active cluster.

Process overview

The overall process includes the following sequential steps:

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If any of the nodes on which the snapshot was taken leave the cluster during the restore process, the process is aborted and all changes are rolled back (to achieve this, a special cache launch mode was introduced, if the node exits during the exchange, the process is rolled back).

Whole cluster restore

// TBD

Snapshot Lifecycle

Sometimes the user is faced with the task of adding post-processing to the snapshot operation, for example, calculating the checksum of files, checking the consistency, etc. The same applies to the recovery procedure - the user should be able to check the consistency of files, checksums, etc. before restore them.

It is impossible to implement pre/post-processing using standard Ignite events. if a custom check detects a problem, the entire operation with the snapshot must be aborted.

It is recommended to add the ability to load SnapshotLifecycleListener user extensions that will implement custom checks.

// TBD

Snapshot requirements

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