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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,226 @@ | ||
| // Copyright 2024 PingCAP, Inc. | ||
| // | ||
| // 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 logclient | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
|
|
||
| "github.com/pingcap/errors" | ||
| backuppb "github.com/pingcap/kvproto/pkg/brpb" | ||
| "github.com/pingcap/log" | ||
| "github.com/pingcap/tidb/br/pkg/stream" | ||
| "github.com/pingcap/tidb/br/pkg/utils" | ||
| "github.com/pingcap/tidb/br/pkg/utils/consts" | ||
| "github.com/pingcap/tidb/pkg/meta" | ||
| "github.com/pingcap/tidb/pkg/meta/model" | ||
| "go.uber.org/zap" | ||
| ) | ||
|
|
||
| // BatchMetaKVProcessor defines how to process a batch of files | ||
| type BatchMetaKVProcessor interface { | ||
| // ProcessBatch processes a batch of files and with a filterTS and return what's not processed for next iteration | ||
| ProcessBatch( | ||
| ctx context.Context, | ||
| files []*backuppb.DataFileInfo, | ||
| entries []*KvEntryWithTS, | ||
| filterTS uint64, | ||
| cf string, | ||
| ) ([]*KvEntryWithTS, error) | ||
| } | ||
|
|
||
| // RestoreMetaKVProcessor implements BatchMetaKVProcessor for restoring files in batches | ||
| type RestoreMetaKVProcessor struct { | ||
| client *LogClient | ||
| schemasReplace *stream.SchemasReplace | ||
| updateStats func(kvCount uint64, size uint64) | ||
| progressInc func() | ||
| } | ||
|
|
||
| func NewRestoreMetaKVProcessor(client *LogClient, schemasReplace *stream.SchemasReplace, | ||
| updateStats func(kvCount uint64, size uint64), | ||
| progressInc func()) *RestoreMetaKVProcessor { | ||
| return &RestoreMetaKVProcessor{ | ||
| client: client, | ||
| schemasReplace: schemasReplace, | ||
| updateStats: updateStats, | ||
| progressInc: progressInc, | ||
| } | ||
| } | ||
|
|
||
| // RestoreAndRewriteMetaKVFiles tries to restore files about meta kv-event from stream-backup. | ||
| func (rp *RestoreMetaKVProcessor) RestoreAndRewriteMetaKVFiles( | ||
| ctx context.Context, | ||
| files []*backuppb.DataFileInfo, | ||
| ) error { | ||
| // starts gc row collector | ||
| rp.client.RunGCRowsLoader(ctx) | ||
|
|
||
| // separate the files by CF and sort each group by TS | ||
| filesInDefaultCF, filesInWriteCF := SeparateAndSortFilesByCF(files) | ||
|
|
||
| log.Info("start to restore meta files", | ||
| zap.Int("total files", len(files)), | ||
| zap.Int("default files", len(filesInDefaultCF)), | ||
| zap.Int("write files", len(filesInWriteCF))) | ||
|
|
||
| if err := LoadAndProcessMetaKVFilesInBatch( | ||
| ctx, | ||
| filesInDefaultCF, | ||
| filesInWriteCF, | ||
| rp, | ||
| ); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| // UpdateTable global schema version to trigger a full reload so every TiDB node in the cluster will get synced with | ||
| // the latest schema update. | ||
| if err := rp.client.UpdateSchemaVersionFullReload(ctx); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (rp *RestoreMetaKVProcessor) ProcessBatch( | ||
| ctx context.Context, | ||
| files []*backuppb.DataFileInfo, | ||
| entries []*KvEntryWithTS, | ||
| filterTS uint64, | ||
| cf string, | ||
| ) ([]*KvEntryWithTS, error) { | ||
| return rp.client.RestoreBatchMetaKVFiles( | ||
| ctx, files, rp.schemasReplace, entries, | ||
| filterTS, rp.updateStats, rp.progressInc, cf, | ||
| ) | ||
| } | ||
|
|
||
| // MetaKVInfoProcessor implements BatchMetaKVProcessor to iterate meta kv and collect information. | ||
| // | ||
| // 1. It collects table renaming information. The table rename operation will not change the table id, and the process | ||
| // will drop the original table and create a new one with the same table id, so in DDL history there will be two events | ||
| // that corresponds to the same table id. | ||
| // | ||
| // 2. It builds the id mapping from upstream to downstream. This logic was nested into table rewrite previously and now | ||
| // separated out to its own component. | ||
| type MetaKVInfoProcessor struct { | ||
| client *LogClient | ||
| tableHistoryManager *stream.LogBackupTableHistoryManager | ||
| tableMappingManager *stream.TableMappingManager | ||
| } | ||
|
|
||
| func NewMetaKVInfoProcessor(client *LogClient) *MetaKVInfoProcessor { | ||
| return &MetaKVInfoProcessor{ | ||
| client: client, | ||
| tableHistoryManager: stream.NewTableHistoryManager(), | ||
| tableMappingManager: stream.NewTableMappingManager(), | ||
| } | ||
| } | ||
|
|
||
| func (mp *MetaKVInfoProcessor) ReadMetaKVFilesAndBuildInfo( | ||
| ctx context.Context, | ||
| files []*backuppb.DataFileInfo, | ||
| ) error { | ||
| // separate the files by CF and sort each group by TS | ||
| filesInDefaultCF, filesInWriteCF := SeparateAndSortFilesByCF(files) | ||
|
|
||
| if err := LoadAndProcessMetaKVFilesInBatch( | ||
| ctx, | ||
| filesInDefaultCF, | ||
| filesInWriteCF, | ||
| mp, | ||
| ); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (mp *MetaKVInfoProcessor) ProcessBatch( | ||
| ctx context.Context, | ||
| files []*backuppb.DataFileInfo, | ||
| entries []*KvEntryWithTS, | ||
| filterTS uint64, | ||
| cf string, | ||
| ) ([]*KvEntryWithTS, error) { | ||
| // doesn't need to parse writeCF as it contains value like "p\XXXX\XXX" which is meaningless. | ||
| // DefaultCF value should contain everything we want for DDL operation | ||
| if cf == consts.WriteCF { | ||
| return nil, nil | ||
| } | ||
|
|
||
| curSortedEntries, filteredEntries, err := mp.client.filterAndSortKvEntriesFromFiles(ctx, files, entries, filterTS) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| // process entries to collect table IDs | ||
| for _, entry := range curSortedEntries { | ||
| value := entry.E.Value | ||
|
|
||
| if utils.IsMetaDBKey(entry.E.Key) { | ||
| rawKey, err := stream.ParseTxnMetaKeyFrom(entry.E.Key) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| if meta.IsDBkey(rawKey.Field) { | ||
| var dbInfo model.DBInfo | ||
| if err := json.Unmarshal(value, &dbInfo); err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| // collect db id -> name mapping during log backup, it will contain information about newly created db | ||
| mp.tableHistoryManager.RecordDBIdToName(dbInfo.ID, dbInfo.Name.O) | ||
|
|
||
| // update the id map | ||
| if err = mp.tableMappingManager.ProcessDBEntryAndUpdateIdMapping(dbInfo); err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
| } else if !meta.IsDBkey(rawKey.Key) { | ||
| // also see RewriteMetaKvEntry | ||
| continue | ||
| } | ||
|
|
||
| // collect table history indexed by table id, same id may have different table names in history | ||
| if meta.IsTableKey(rawKey.Field) { | ||
| var tableInfo model.TableInfo | ||
| if err := json.Unmarshal(value, &tableInfo); err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
| // cannot use dbib in the parsed table info cuz it might not set so default to 0 | ||
| dbID, err := meta.ParseDBKey(rawKey.Key) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| // add to table rename history | ||
| mp.tableHistoryManager.AddTableHistory(tableInfo.ID, tableInfo.Name.String(), dbID) | ||
|
|
||
| // update the id map | ||
| if err = mp.tableMappingManager.ProcessTableEntryAndUpdateIdMapping(dbID, tableInfo); err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return filteredEntries, nil | ||
| } | ||
|
|
||
| func (mp *MetaKVInfoProcessor) GetTableMappingManager() *stream.TableMappingManager { | ||
| return mp.tableMappingManager | ||
| } | ||
|
|
||
| func (mp *MetaKVInfoProcessor) GetTableHistoryManager() *stream.LogBackupTableHistoryManager { | ||
| return mp.tableHistoryManager | ||
| } |
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