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refactor ickp executor to make it stoppable Approved by: @triump2020, @LeftHandCold
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,221 @@ | ||
| // Copyright 2021 Matrix Origin | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package checkpoint | ||
|
|
||
| import ( | ||
| "context" | ||
| "sync/atomic" | ||
| "time" | ||
|
|
||
| "github.com/matrixorigin/matrixone/pkg/common/moerr" | ||
| "github.com/matrixorigin/matrixone/pkg/logutil" | ||
| v2 "github.com/matrixorigin/matrixone/pkg/util/metric/v2" | ||
| "github.com/matrixorigin/matrixone/pkg/vm/engine/tae/wal" | ||
| "go.uber.org/zap" | ||
| ) | ||
|
|
||
| type checkpointJob struct { | ||
| doneCh chan struct{} | ||
| runner *runner | ||
|
|
||
| runICKPFunc func(context.Context, *runner) error | ||
| } | ||
|
|
||
| func (job *checkpointJob) RunICKP(ctx context.Context) (err error) { | ||
| if job.runICKPFunc != nil { | ||
| return job.runICKPFunc(ctx, job.runner) | ||
| } | ||
| select { | ||
| case <-ctx.Done(): | ||
| return context.Cause(ctx) | ||
| default: | ||
| } | ||
|
|
||
| entry, rollback := job.runner.store.TakeICKPIntent() | ||
| if entry == nil { | ||
| return | ||
| } | ||
|
|
||
| var ( | ||
| errPhase string | ||
| lsnToTruncate uint64 | ||
| lsn uint64 | ||
| fatal bool | ||
| fields []zap.Field | ||
| now = time.Now() | ||
| ) | ||
|
|
||
| logutil.Info( | ||
| "ICKP-Execute-Start", | ||
| zap.String("entry", entry.String()), | ||
| ) | ||
|
|
||
| defer func() { | ||
| if err != nil { | ||
| var logger func(msg string, fields ...zap.Field) | ||
| if fatal { | ||
| logger = logutil.Fatal | ||
| } else { | ||
| logger = logutil.Error | ||
| } | ||
| logger( | ||
| "ICKP-Execute-Error", | ||
| zap.String("entry", entry.String()), | ||
| zap.Error(err), | ||
| zap.String("phase", errPhase), | ||
| zap.Duration("cost", time.Since(now)), | ||
| ) | ||
| } else { | ||
| fields = append(fields, zap.Duration("cost", time.Since(now))) | ||
| fields = append(fields, zap.Uint64("truncate", lsnToTruncate)) | ||
| fields = append(fields, zap.Uint64("lsn", lsn)) | ||
| fields = append(fields, zap.Uint64("reserve", job.runner.options.reservedWALEntryCount)) | ||
| fields = append(fields, zap.String("entry", entry.String())) | ||
| fields = append(fields, zap.Duration("age", entry.Age())) | ||
| logutil.Info( | ||
| "ICKP-Execute-End", | ||
| fields..., | ||
| ) | ||
| } | ||
| }() | ||
|
|
||
| var files []string | ||
| var file string | ||
| if fields, files, err = job.runner.doIncrementalCheckpoint(entry); err != nil { | ||
| errPhase = "do-ckp" | ||
| rollback() | ||
| return | ||
| } | ||
|
|
||
| lsn = job.runner.source.GetMaxLSN(entry.start, entry.end) | ||
| if lsn > job.runner.options.reservedWALEntryCount { | ||
| lsnToTruncate = lsn - job.runner.options.reservedWALEntryCount | ||
| } | ||
| entry.SetLSN(lsn, lsnToTruncate) | ||
|
|
||
| if prepared := job.runner.store.PrepareCommitICKPIntent(entry); !prepared { | ||
| errPhase = "prepare" | ||
| rollback() | ||
| err = moerr.NewInternalErrorNoCtxf("cannot prepare ickp") | ||
| return | ||
| } | ||
|
|
||
| if file, err = job.runner.saveCheckpoint( | ||
| entry.start, entry.end, | ||
| ); err != nil { | ||
| errPhase = "save-ckp" | ||
| job.runner.store.RollbackICKPIntent(entry) | ||
| rollback() | ||
| return | ||
| } | ||
|
|
||
| job.runner.store.CommitICKPIntent(entry) | ||
| v2.TaskCkpEntryPendingDurationHistogram.Observe(entry.Age().Seconds()) | ||
|
|
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| files = append(files, file) | ||
|
|
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| // PXU TODO: if crash here, the checkpoint log entry will be lost | ||
| var logEntry wal.LogEntry | ||
| if logEntry, err = job.runner.wal.RangeCheckpoint(1, lsnToTruncate, files...); err != nil { | ||
| errPhase = "wal-ckp" | ||
| fatal = true | ||
| return | ||
| } | ||
| if err = logEntry.WaitDone(); err != nil { | ||
| errPhase = "wait-wal-ckp-done" | ||
| fatal = true | ||
| return | ||
| } | ||
|
|
||
| job.runner.postCheckpointQueue.Enqueue(entry) | ||
| job.runner.globalCheckpointQueue.Enqueue(&globalCheckpointContext{ | ||
| end: entry.end, | ||
| interval: job.runner.options.globalVersionInterval, | ||
| ckpLSN: lsn, | ||
| truncateLSN: lsnToTruncate, | ||
| }) | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (job *checkpointJob) WaitC() <-chan struct{} { | ||
| return job.doneCh | ||
| } | ||
|
|
||
| func (job *checkpointJob) Done() { | ||
| close(job.doneCh) | ||
| } | ||
|
|
||
| type checkpointExecutor struct { | ||
| ctx context.Context | ||
| cancel context.CancelCauseFunc | ||
| active atomic.Bool | ||
| running atomic.Pointer[checkpointJob] | ||
|
|
||
| runner *runner | ||
| runICKPFunc func(context.Context, *runner) error | ||
| } | ||
|
|
||
| func newCheckpointExecutor( | ||
| runner *runner, | ||
| ) *checkpointExecutor { | ||
| ctx, cancel := context.WithCancelCause(context.Background()) | ||
| e := &checkpointExecutor{ | ||
| runner: runner, | ||
| ctx: ctx, | ||
| cancel: cancel, | ||
| } | ||
| e.active.Store(true) | ||
| return e | ||
| } | ||
|
|
||
| func (e *checkpointExecutor) StopWithCause(cause error) { | ||
| e.active.Store(false) | ||
| if cause == nil { | ||
| cause = ErrCheckpointDisabled | ||
| } | ||
| e.cancel(cause) | ||
| job := e.running.Load() | ||
| if job != nil { | ||
| <-job.WaitC() | ||
| } | ||
| e.running.Store(nil) | ||
| e.runner = nil | ||
| } | ||
|
|
||
| func (e *checkpointExecutor) RunICKP() (err error) { | ||
| if !e.active.Load() { | ||
| err = ErrCheckpointDisabled | ||
| return | ||
| } | ||
| if e.running.Load() != nil { | ||
| err = ErrPendingCheckpoint | ||
| } | ||
| job := &checkpointJob{ | ||
| doneCh: make(chan struct{}), | ||
| runner: e.runner, | ||
| runICKPFunc: e.runICKPFunc, | ||
| } | ||
| if !e.running.CompareAndSwap(nil, job) { | ||
| err = ErrPendingCheckpoint | ||
| return | ||
| } | ||
| defer func() { | ||
| job.Done() | ||
| e.running.Store(nil) | ||
| }() | ||
| err = job.RunICKP(e.ctx) | ||
| return | ||
| } |
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