[IOTDB-4209] Use .pst to accelerate recovery in SchemaFile mode #7995
Merged
MarcosZyk merged 19 commits intoapache:masterfrom Feb 13, 2023
Merged
[IOTDB-4209] Use .pst to accelerate recovery in SchemaFile mode #7995MarcosZyk merged 19 commits intoapache:masterfrom
MarcosZyk merged 19 commits intoapache:masterfrom
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# Conflicts: # server/src/main/java/org/apache/iotdb/db/metadata/logfile/MLogDescription.java # server/src/main/java/org/apache/iotdb/db/metadata/logfile/MLogDescriptionWriter.java # server/src/main/java/org/apache/iotdb/db/metadata/schemaregion/SchemaRegionSchemaFileImpl.java
MarcosZyk
reviewed
Feb 12, 2023
MarcosZyk
reviewed
Feb 12, 2023
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Description
In the original process, recovery in SchemaFile mode will overwrite the .pst file and redo all the plans in MLog.
However, it causes unnecessary additional I/O cost. Therefore, the records in the mlog can be removed after flushing the .pst file. When recovering, we only need to redo the plans in the mlog that have not been persisted into the .pst file.
Performance Test
Environment
Benchmark Config:
IoTDB Config:
Do not use check point
Create timeseries ≈ 41.59 second
Recover [root.test.g_0.SchemaRegion[0]] spend: 30612 ms
Use check point
Create timeseries ≈ 41.56 second
Recover [root.test.g_0.SchemaRegion[0]] spend: 1309 ms