github.com/matrixorigin/matrixone@v0.7.0/pkg/vm/engine/tae/wal/checkpoint.go (about)

     1  // Copyright 2021 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package wal
    16  
    17  import (
    18  	"time"
    19  
    20  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/common"
    21  )
    22  
    23  func (driver *walDriver) Checkpoint(indexes []*Index) (e LogEntry, err error) {
    24  	e, err = driver.impl.FuzzyCheckpoint(GroupPrepare, indexes)
    25  	return
    26  }
    27  
    28  func (driver *walDriver) RangeCheckpoint(start, end uint64) (e LogEntry, err error) {
    29  	e, err = driver.impl.RangeCheckpoint(GroupPrepare, start, end)
    30  	return
    31  }
    32  
    33  func (driver *walDriver) checkpointTicker() {
    34  	defer driver.wg.Done()
    35  	ticker := time.NewTicker(driver.ckpDuration)
    36  	for {
    37  		select {
    38  		case <-driver.cancelContext.Done():
    39  			return
    40  		case <-ticker.C:
    41  			driver.CkpUC()
    42  		}
    43  	}
    44  }
    45  
    46  // tid-lsn-ckped uclsn-tid,tid-clsn,cckped
    47  func (driver *walDriver) CkpUC() {
    48  	ckpedlsn := driver.impl.GetCheckpointed(GroupPrepare)
    49  	ucLsn := driver.impl.GetCheckpointed(GroupUC)
    50  	maxLsn := driver.impl.GetSynced(GroupUC)
    51  	ckpedUC := ucLsn
    52  	driver.cmu.RLock()
    53  	driver.ucmu.RLock()
    54  	for i := ucLsn + 1; i <= maxLsn; i++ {
    55  		tid, ok := driver.ucLsnTidMap[i]
    56  		if !ok {
    57  			break
    58  		}
    59  		lsn, ok := driver.cTidLsnMap[tid]
    60  		if !ok {
    61  			break
    62  		}
    63  		if lsn > ckpedlsn {
    64  			break
    65  		}
    66  		ckpedUC = i
    67  	}
    68  	driver.cmu.RUnlock()
    69  	driver.ucmu.RUnlock()
    70  	if ckpedUC == ucLsn {
    71  		return
    72  	}
    73  	e, err := driver.impl.RangeCheckpoint(GroupUC, 0, ckpedUC)
    74  	if err == common.ErrClose {
    75  		return
    76  	}
    77  	if err != nil {
    78  		panic(err)
    79  	}
    80  	err = e.WaitDone()
    81  	if err != nil {
    82  		panic(err)
    83  	}
    84  }