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Lisheng Sun commented on HDFS-6524: ----------------------------------- hi [~elgoiri] , i agree your option. There are same problems in TestRollingUpgrade and TestEncryptedTransfer. we can fix them by putting up new jira later. > Choosing datanode retries times considering with block replica number > ---------------------------------------------------------------------- > > Key: HDFS-6524 > URL: https://issues.apache.org/jira/browse/HDFS-6524 > Project: Hadoop HDFS > Issue Type: Improvement > Components: hdfs-client > Affects Versions: 3.0.0-alpha1 > Reporter: Liang Xie > Assignee: Lisheng Sun > Priority: Minor > Labels: BB2015-05-TBR > Attachments: HDFS-6524.001.patch, HDFS-6524.002.patch, > HDFS-6524.003.patch, HDFS-6524.004.patch, HDFS-6524.005.patch, HDFS-6524.txt > > > Currently the chooseDataNode() does retry with the setting: > dfsClientConf.maxBlockAcquireFailures, which by default is 3 > (DFS_CLIENT_MAX_BLOCK_ACQUIRE_FAILURES_DEFAULT = 3), it would be better > having another option, block replication factor. One cluster with only two > block replica setting, or using Reed-solomon encoding solution with one > replica factor. It helps to reduce the long tail latency. -- This message was sent by Atlassian Jira (v8.3.2#803003) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org