[IOTDB-1131] Improve wal by using differential logging#3975
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[IOTDB-1131] Improve wal by using differential logging#3975
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# Conflicts: # server/src/main/java/org/apache/iotdb/db/conf/IoTDBConfig.java # server/src/main/java/org/apache/iotdb/db/engine/storagegroup/StorageGroupProcessor.java # server/src/main/java/org/apache/iotdb/db/qp/physical/PhysicalPlan.java # server/src/main/java/org/apache/iotdb/db/qp/physical/crud/InsertTabletPlan.java # server/src/main/java/org/apache/iotdb/db/utils/CommonUtils.java # server/src/main/java/org/apache/iotdb/db/writelog/recover/TsFileRecoverPerformer.java
fix log selection in log window
# Conflicts: # server/src/main/java/org/apache/iotdb/db/engine/flush/MemTableFlushTask.java # server/src/main/java/org/apache/iotdb/db/engine/storagegroup/StorageGroupProcessor.java # server/src/main/java/org/apache/iotdb/db/qp/physical/PhysicalPlan.java # server/src/main/java/org/apache/iotdb/db/qp/physical/crud/InsertTabletPlan.java # server/src/main/java/org/apache/iotdb/db/utils/CommonUtils.java # server/src/main/java/org/apache/iotdb/db/utils/SerializeUtils.java # server/src/main/java/org/apache/iotdb/db/writelog/node/ExclusiveWriteLogNode.java
# Conflicts: # server/src/main/java/org/apache/iotdb/db/qp/physical/PhysicalPlan.java # server/src/main/java/org/apache/iotdb/db/writelog/node/ExclusiveWriteLogNode.java
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Description
Original author: jt2594838
(Resubmit the PR #1869)
WALs may contain duplicated fields like deviceIds, measurementsId and data types. This PR aims to eliminate them to improve WAL performance when using small batchSize and without damaging the performance when using large batchSize.
Design:
Differential Logging.docx
Evaluation:
differentiation_logging.xlsx