edff30f82a
The `maxUnsafeAutoIdTimestamp` timestamp is a safety marker guaranteeing that no retried-indexing operation with a higher auto gen id timestamp was process by the engine. This allows us to safely process documents without checking if they were seen before. Currently this property is maintained in memory and is handed off from the primary to any replica during the recovery process. This commit takes a more natural approach and stores it in the lucene commit, using the same semantics (no retry op with a higher time stamp is part of this commit). This means that the knowledge is transferred during the file copy and also means that we don't need to worry about crazy situations where an original append only request arrives at the engine after a retry was processed *and* the engine was restarted. |
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