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Posted to hdfs-dev@hadoop.apache.org by "Liyin Liang (JIRA)" <ji...@apache.org> on 2011/01/06 13:56:46 UTC

[jira] Created: (HDFS-1572) Checkpointer should trigger checkpoint with specified period.

Checkpointer should trigger checkpoint with specified period.
-------------------------------------------------------------

                 Key: HDFS-1572
                 URL: https://issues.apache.org/jira/browse/HDFS-1572
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Liyin Liang
            Priority: Blocker


{code:}
  long now = now();
  boolean shouldCheckpoint = false;
  if(now >= lastCheckpointTime + periodMSec) {
    shouldCheckpoint = true;
  } else {
    long size = getJournalSize();
    if(size >= checkpointSize)
      shouldCheckpoint = true;
  }
{code}
{dfs.namenode.checkpoint.period} in configuration determines the period of checkpoint. However, with above code, the Checkpointer triggers a checkpoint every 5 minutes (periodMSec=5*60*1000). According to SecondaryNameNode.java, the first *if*  statement should be:
 {code:}
if(now >= lastCheckpointTime + 1000 * checkpointPeriod) {
 {code}


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