Andrew Wong has uploaded this change for review. ( http://gerrit.cloudera.org:8080/16470
Change subject: KUDU-2612 p10: have timestamp assignment account for commit timestamps ...................................................................... KUDU-2612 p10: have timestamp assignment account for commit timestamps One of the hurdles to performing a transaction's commit on a participant is that the commit process must ensure repeatable reads. Without multi-op transactions, this is done via a dance between the TimeManager (the entity that tracks and assigns timestamps) and the MvccManager (the entity that tracks the lifecycle of ops). This patch extends the dance between the TimeManager and MvccManager to ensure that when a participant commits a transaction, all future ops will be assigned a higher timestamp. I found it time-consuming to peruse the existing codebase for how timestamp assignment ensured repeatable reads, so I added a block comment to time_manager.h describing how it does so. I also added a section about how this patch extends it to ensure repeatable reads in the context of transactions. Change-Id: I0412fd0cf778d96f3fe6b14624d8d06942f40e72 --- M src/kudu/consensus/consensus_queue.cc M src/kudu/consensus/time_manager-test.cc M src/kudu/consensus/time_manager.cc M src/kudu/consensus/time_manager.h M src/kudu/integration-tests/txn_participant-itest.cc M src/kudu/tablet/ops/participant_op.cc M src/kudu/tablet/ops/participant_op.h M src/kudu/tablet/ops/write_op.cc M src/kudu/tablet/ops/write_op.h M src/kudu/tablet/tablet.cc M src/kudu/tablet/tablet.h M src/kudu/tablet/tablet_bootstrap.cc M src/kudu/tablet/txn_participant.h 13 files changed, 420 insertions(+), 79 deletions(-) git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/70/16470/1 -- To view, visit http://gerrit.cloudera.org:8080/16470 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: kudu Gerrit-Branch: master Gerrit-MessageType: newchange Gerrit-Change-Id: I0412fd0cf778d96f3fe6b14624d8d06942f40e72 Gerrit-Change-Number: 16470 Gerrit-PatchSet: 1 Gerrit-Owner: Andrew Wong <aw...@cloudera.com>
