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relay: align with MySQL when using GTID #1390

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merged 17 commits into from
Jan 26, 2021
Merged

relay: align with MySQL when using GTID #1390

merged 17 commits into from
Jan 26, 2021

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GMHDBJD
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@GMHDBJD GMHDBJD commented Jan 19, 2021 •
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What problem does this PR solve?

close #1383

What is changed and how it works?

  • getPosByGTID always return the begin pos of the collect relay log file (filename, 4)
  • startSyncByGTID should replace event to heartbeat event which already be contained for specified gtid set
  • adjust gtid for relay

Check List

Tests

  • Unit test

@GMHDBJD GMHDBJD added status/WIP This PR is still work in progress type/bug-fix Bug fix needs-update-release-note This PR should be added into release notes. Remove this label once the release notes are updated labels Jan 19, 2021
@GMHDBJD GMHDBJD added this to the v2.0.2 milestone Jan 19, 2021
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GMHDBJD commented Jan 19, 2021

/run-all-tests

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GMHDBJD commented Jan 19, 2021

/run-all-tests

@GMHDBJD GMHDBJD added status/PTAL This PR is ready for review. Add this label back after committing new changes and removed status/WIP This PR is still work in progress labels Jan 20, 2021
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GMHDBJD commented Jan 20, 2021

/run-all-tests

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GMHDBJD commented Jan 20, 2021

/run-all-tests

@GMHDBJD GMHDBJD added status/WIP This PR is still work in progress and removed status/PTAL This PR is ready for review. Add this label back after committing new changes labels Jan 20, 2021
@GMHDBJD GMHDBJD added status/PTAL This PR is ready for review. Add this label back after committing new changes needs-cherry-pick-release-2.0 This PR should be cherry-picked to release-2.0. Remove this label after cherry-picked to release-2.0 and removed status/WIP This PR is still work in progress labels Jan 21, 2021
lance6716
lance6716 reviewed Jan 21, 2021
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will review later

pkg/binlog/event/event.go
// modify header
headerClone := *header // do a copy
headerClone.Flags = 0
headerClone.EventSize = 39
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@lance6716 lance6716 Jan 21, 2021 •
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does MySQL choose not keeping size? I think this may cause positions in query-status mismatched which may confuse user

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It keeps the LogPos but not EventSize.

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@GMHDBJD GMHDBJD Jan 21, 2021 •
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That meets problem when we calculate startPosition, but we don't calculate it for heartbeat event.

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will review later

pkg/streamer/reader.go Outdated Show resolved Hide resolved
pkg/streamer/reader.go Outdated
err2 := r.advanceCurrentGtidSet(fmt.Sprintf("%s:%d", u.String(), ev.GNO))
if err2 != nil {
return errors.Trace(err2)
r.replaceWithHeartbeat, err = r.advanceCurrentGtidSet(fmt.Sprintf("%s:%d", u.String(), ev.GNO))
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could we use a local variable instead of a member of BinlogReader? BTW, I think we could reset replaceWithHeartbeat before switch in L446

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@GMHDBJD GMHDBJD Jan 21, 2021 •
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Change to local variable. We should not reset since if a GTIDEvent is replaced with heartbeat event, that means later event such QueryEvent, RowsEvent,TableMapEvent should also be replaced because they are in the same transaction.

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rest LGTM

(I'll commit the changes since author is leaving)

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/lgtm

@ti-srebot ti-srebot added the status/LGT1 One reviewer already commented LGTM label Jan 25, 2021
lichunzhu
lichunzhu approved these changes Jan 26, 2021
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LGTM

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/lgtm

@ti-srebot ti-srebot removed the status/LGT1 One reviewer already commented LGTM label Jan 26, 2021
@ti-srebot ti-srebot added the status/LGT2 Two reviewers already commented LGTM, ready for merge label Jan 26, 2021
@lance6716 lance6716 merged commit 3cb465b into pingcap:master Jan 26, 2021
ti-srebot pushed a commit to ti-srebot/dm that referenced this pull request Jan 26, 2021
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cherry pick pingcap#1390 to release-2.0
971c2ad 
Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
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cherry pick to release-2.0 in PR #1403

@ti-srebot ti-srebot added already-cherry-pick-2.0 The related PR is already cherry-picked to release-2.0. Add this label once the PR is cherry-picked and removed needs-cherry-pick-release-2.0 This PR should be cherry-picked to release-2.0. Remove this label after cherry-picked to release-2.0 labels Jan 26, 2021
lance6716 pushed a commit that referenced this pull request Jan 27, 2021
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cherry pick #1390 to release-2.0 (#1403)
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@lance6716 lance6716 mentioned this pull request Mar 30, 2022
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relay's behaviour should align with MySQL when using GTID
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