Andrew Wong has submitted this change and it was merged. (
http://gerrit.cloudera.org:8080/17097 )
Change subject: KUDU-2612: add ScopedPartitionLock
......................................................................
KUDU-2612: add ScopedPartitionLock
This patch introduces a coarse-grained partition-level lock
ScopedPartitionLock to prevent dirty writes for multi-row transactions,
similar to the ScopedRowLock, but for locking the entire LockManager
instead of individual rows.
A partition lock can only be held by a single transaction at a time. A
given transaction can acquire the lock multiple times. To prevent
deadlocks, a wait-die scheme is used -- if a transaction requires a lock
held by another transaction:
1. Retry the op if the requesting transaction has a lower txn ID than
the current holder ("wait"),
2. Otherwise abort the requesting transaction immediately ("die").
A later patch will plumb this locking into participant ops and
transactional write ops.
Change-Id: I158115739ce3e7cfb77bbcb854e834336c1256b1
Reviewed-on: http://gerrit.cloudera.org:8080/17097
Reviewed-by: Alexey Serbin <[email protected]>
Tested-by: Andrew Wong <[email protected]>
---
M src/kudu/tablet/lock_manager-test.cc
M src/kudu/tablet/lock_manager.cc
M src/kudu/tablet/lock_manager.h
M src/kudu/tserver/tserver.proto
4 files changed, 540 insertions(+), 16 deletions(-)
Approvals:
Alexey Serbin: Looks good to me, approved
Andrew Wong: Verified
--
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I158115739ce3e7cfb77bbcb854e834336c1256b1
Gerrit-Change-Number: 17097
Gerrit-PatchSet: 16
Gerrit-Owner: Hao Hao <[email protected]>
Gerrit-Reviewer: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Andrew Wong <[email protected]>
Gerrit-Reviewer: Bankim Bhavsar <[email protected]>
Gerrit-Reviewer: Hao Hao <[email protected]>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Tidy Bot (241)
