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| author | Louis Williams <louis.williams@mongodb.com> | 2020-05-12 13:39:31 -0400 |
|---|---|---|
| committer | Evergreen Agent <no-reply@evergreen.mongodb.com> | 2020-05-12 18:03:48 +0000 |
| commit | 25c694f365db0f07a445bd17b6cd5cbf32f5f2f9 (patch) | |
| tree | c90451e347838f428b8cad851531b42c42cce6fa /src/mongo/db/storage/snapshot_manager.h | |
| parent | e2602ad053b2120982fbcac8e33e1ad64e6ec30a (diff) | |
| download | mongo-25c694f365db0f07a445bd17b6cd5cbf32f5f2f9.tar.gz | |
SERVER-46721 Secondary readers should read at the no-overlap time instead of lastApplied
The no-overlap time, ReadSource::kNoOverlap, is the minimum of replication's lastApplied timestamp
and WiredTiger's all_durable time. This time is independent of replication state and ensures
queries do not see oplog holes after state transitions from secondary to primary.
Diffstat (limited to 'src/mongo/db/storage/snapshot_manager.h')
| -rw-r--r-- | src/mongo/db/storage/snapshot_manager.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/mongo/db/storage/snapshot_manager.h b/src/mongo/db/storage/snapshot_manager.h index d41df1c5013..7839ef179ba 100644 --- a/src/mongo/db/storage/snapshot_manager.h +++ b/src/mongo/db/storage/snapshot_manager.h @@ -59,14 +59,14 @@ public: virtual void setCommittedSnapshot(const Timestamp& timestamp) = 0; /** - * Sets the snapshot for the last stable timestamp for reading on secondaries. + * Sets the lastApplied timestamp. */ - virtual void setLocalSnapshot(const Timestamp& timestamp) = 0; + virtual void setLastApplied(const Timestamp& timestamp) = 0; /** - * Returns the local snapshot timestamp. + * Returns the lastApplied timestamp. */ - virtual boost::optional<Timestamp> getLocalSnapshot() = 0; + virtual boost::optional<Timestamp> getLastApplied() = 0; /** * Drops all snapshots and clears the "committed" snapshot. |