Cherry pick follower read to TiDB (#11347) #13464
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The original cherry-pick PR to 3.1 is #12535 |
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cherry pick pingcap#11347 to 3.1 Fix code conflicts from 4.0 to 3.1. Users can use tidb_replica_read session variable to choose reading from leader or follower. To make it consistent with existing behavior, leader will be used by default unless follower is explicitly specified otherwise. Add a session scope variable tidb_replica_read to specify if TiDB should read data from leader or follower.
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/run-all-tests tikv=release-3.1 |
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/run-all-tests tikv=release-3.1 pd=release-3.1 |
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cherry pick #11347 to 3.1
Fix code conflicts from 4.0 to 3.1. Users can use tidb_replica_read session variable to choose reading from leader or follower. To make it consistent with existing behavior, leader will be used by default unless follower is explicitly specified otherwise.
Add a session scope variable tidb_replica_read to specify if TiDB should read data from leader or follower.