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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2020/06/09 16:43:10 UTC

[GitHub] [incubator-iotdb] neuyilan opened a new pull request #1339: [IOTDB-723] add raft log delete mechanism

neuyilan opened a new pull request #1339:
URL: https://github.com/apache/incubator-iotdb/pull/1339


   The main logic for deleting raft logs is as follows:
   Each server periodically(3600 seconds) triggers the operation to check the deletion of the log. If the distance between the last deletion log index and  the current maximum commited index exceeds a certain threshold, it performs the deletion operation, otherwise do nothing.
   
   please leave your opinions, thanks


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[GitHub] [incubator-iotdb] jt2594838 commented on a change in pull request #1339: [IOTDB-723] add raft log delete mechanism

Posted by GitBox <gi...@apache.org>.
jt2594838 commented on a change in pull request #1339:
URL: https://github.com/apache/incubator-iotdb/pull/1339#discussion_r437844557



##########
File path: cluster/src/main/java/org/apache/iotdb/cluster/log/manage/serializable/SyncLogDequeSerializer.java
##########
@@ -79,6 +85,24 @@
   // version controller
   private VersionController versionController;
 
+  private ScheduledExecutorService executorService;
+
+
+  /**
+   * the max number of committed logs to be saved
+   */
+  private int maxNumberLogs = 100;

Review comment:
       It would be better to put this into the configs.

##########
File path: cluster/src/main/java/org/apache/iotdb/cluster/log/manage/RaftLogManager.java
##########
@@ -50,6 +54,17 @@
   private long commitIndex;
   private LogApplier logApplier;
 
+  /**
+   * the max number of committed logs to be saved
+   */
+  private int maxNumberLogs = 100;

Review comment:
       It would be better to make this a config.




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[GitHub] [incubator-iotdb] neuyilan commented on a change in pull request #1339: [IOTDB-723] add raft log delete mechanism

Posted by GitBox <gi...@apache.org>.
neuyilan commented on a change in pull request #1339:
URL: https://github.com/apache/incubator-iotdb/pull/1339#discussion_r437896543



##########
File path: cluster/src/main/java/org/apache/iotdb/cluster/log/manage/RaftLogManager.java
##########
@@ -50,6 +54,17 @@
   private long commitIndex;
   private LogApplier logApplier;
 
+  /**
+   * the max number of committed logs to be saved
+   */
+  private int maxNumberLogs = 100;

Review comment:
       I have put the MAX_NUMBER_OF_LOGS and   LOG_DELETION_CHECK_INTERVAL_SECOND in iotdb-cluster.properties 




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[GitHub] [incubator-iotdb] jt2594838 merged pull request #1339: [IOTDB-723] add raft log delete mechanism

Posted by GitBox <gi...@apache.org>.
jt2594838 merged pull request #1339:
URL: https://github.com/apache/incubator-iotdb/pull/1339


   


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[GitHub] [incubator-iotdb] LebronAl commented on pull request #1339: [IOTDB-723] add raft log delete mechanism

Posted by GitBox <gi...@apache.org>.
LebronAl commented on pull request #1339:
URL: https://github.com/apache/incubator-iotdb/pull/1339#issuecomment-641671481


   How about the raft logs in Memory(CommittedLogManager)?Is it better to make them consistent after deleting old logs?


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[GitHub] [incubator-iotdb] LebronAl commented on pull request #1339: [IOTDB-723] add raft log delete mechanism

Posted by GitBox <gi...@apache.org>.
LebronAl commented on pull request #1339:
URL: https://github.com/apache/incubator-iotdb/pull/1339#issuecomment-641759183


   LGTM


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