Add commit marker with timestamp #9266
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| @@ -2114,6 +2149,76 @@ class MemTableInserter : public WriteBatch::Handler { | |||
| return s; | |||
| } | |||
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| Status MarkCommitWithTimestamp(const Slice& name, | |||
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I think it would be nice to reuse/share some code between MarkCommit and MarkCommitWithTimestamp.
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I am thinking of keeping this mid-sized PR simple such that it does not change existing logic used intensively by production workloads at this sensitive time of year :).
I am also not very sure if future changes to timestamp/transaction will make these two methods' implementation diverge for more complex transaction write-policies, e.g. write-prepared/write-unprepared. Maybe it's not the worst idea just to leave them separate for now.
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Thanks for the PR @riversand963 ! LGTM in general, just one comment. P.S. Also, there are a couple of Java failures that seem legit |
Summary: Pull Request resolved: facebook#9266 This diff adds a new tag `CommitWithTimestamp`. Currently, there is no API to trigger writing this tag to WAL, thus it is unavailable to users. This is an ongoing effort to add user-defined timestamp support to write-committed transactions. This diff also indicates all column families that may potentially participate in the same transaction must either disable timestamp or have the same timestamp format, since `CommitWithTimestamp` tag is followed by a single byte-array denoting the commit timestamp of the transaction. We will enforce this checking in a future diff. We keep this diff small. Reviewed By: ltamasi Differential Revision: D31721350 fbshipit-source-id: 16636d7441d79eec3cda73bff4b699f545e7aeab
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Thanks @ltamasi for the review! |
Summary:
This diff adds a new tag
CommitWithTimestamp. Currently, there is no API to trigger writingthis tag to WAL, thus it is unavailable to users.
This is an ongoing effort to add user-defined timestamp support to write-committed transactions.
This diff also indicates all column families that may potentially participate in the same
transaction must either disable timestamp or have the same timestamp format, since
CommitWithTimestamptag is followed by a single byte-array denoting the committimestamp of the transaction. We will enforce this checking in a future diff. We keep this
diff small.
Differential Revision: D31721350