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Local partition re-encryption strategy is similar to partition snapshotting - create partition snapshot re- encrypted with the new key and then swap the original partition file with the new one.

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While updates are blocked each local node:

1. Forces the checkpoint (required for WAL consistency?)
2. Swap all partition files:
   1. Backup original file.
   2. Move re-encrypted file at to the place of the original one.
3. Change encryption key(s) in metastore (update encryption keys history).
4. Remove partition backups (2a).

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