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[HDFS-6110] adding more slow action log in critical write path - HDFS - [issue]
...After digging a HBase write spike issue caused by slow buffer io in our cluster, just realize we'd better to add more abnormal latency warning log in write flow, such that if other guys hit ...
http://issues.apache.org/jira/browse/HDFS-6110    Author: Liang Xie, 2014-04-11, 10:21
[HDFS-5776] Support 'hedged' reads in DFSClient - HDFS - [issue]
...This is a placeholder of hdfs related stuff backport from https://issues.apache.org/jira/browse/HBASE-7509The quorum read ability should be helpful especially to optimize read outlierswe can...
http://issues.apache.org/jira/browse/HDFS-5776    Author: Liang Xie, 2014-04-10, 21:57
[HDFS-6108] make the length of the range in sync_file_range() configurable - HDFS - [issue]
...Current codebase has a hard code value for sync_file_range system call, we'd better to make it configurable, since different scenario probably has a different/better value for it. (ps: i fou...
http://issues.apache.org/jira/browse/HDFS-6108    Author: Liang Xie, 2014-03-19, 02:34
[HDFS-6109] let sync_file_range() system call run in backgroud - HDFS - [issue]
...Through we passed SYNC_FILE_RANGE_WRITE to sync_file_range, to make it as asynchronous as possible, it still could be blocked, e.g. the os io request queue is full.Since we use sync_file_ran...
http://issues.apache.org/jira/browse/HDFS-6109    Author: Liang Xie, 2014-03-18, 03:18
[HDFS-5917] Have an ability to refresh deadNodes list periodically - HDFS - [issue]
...In current HBase + HDFS trunk impl, if one node is added into deadNodes map, before deadNodes.clear() be invoked, this node could not be chosen any more. When i fixed HDFS-5637, i had a raw ...
http://issues.apache.org/jira/browse/HDFS-5917    Author: Liang Xie, 2014-03-04, 05:18
[HDFS-5637] try to refeatchToken while local read InvalidToken occurred - HDFS - [issue]
...we observed several warning logs like below from region server nodes:2013-12-05,13:22:26,042 WARN org.apache.hadoop.hdfs.DFSClient: Failed to connect to /10.2.201.110:11402 for block, add to...
http://issues.apache.org/jira/browse/HDFS-5637    Author: Liang Xie, 2014-02-03, 17:06
[HDFS-4120] Add a new "-skipSharedEditsCheck" option for BootstrapStandby - HDFS - [issue]
...Per https://issues.apache.org/jira/browse/HDFS-3752?focusedCommentId=13449466&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13449466 , let's introduce a n...
http://issues.apache.org/jira/browse/HDFS-4120    Author: Liang Xie, 2014-02-02, 10:33
[HDFS-5727] introduce a self-maintaining io queue handling mechanism - HDFS - [issue]
...Currently the datanode read/write SLA is difficult to be guaranteed for HBase online requirement. One of major reasons is we don't support io priority or io request reorder inside datanode.I...
http://issues.apache.org/jira/browse/HDFS-5727    Author: Liang Xie, 2014-01-22, 01:53
[HDFS-5766] In DFSInputStream, do not add datanode to deadNodes after InvalidEncryptionKeyException in fetchBlockByteRange - HDFS - [issue]
...Found this issue when i read fetchBlockByteRange code:If we hit InvalidEncryptionKeyException, current logic is:1) reduce the retry count2) clearDataEncryptionKey3) addToDeadNodes4) retry in...
http://issues.apache.org/jira/browse/HDFS-5766    Author: Liang Xie, 2014-01-16, 13:41
[HDFS-5663] make the retry time and interval value configurable in openInfo() - HDFS - [issue]
...The original idea raised from Michael here: https://issues.apache.org/jira/browse/HDFS-1605?focusedCommentId=13846972&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpane...
http://issues.apache.org/jira/browse/HDFS-5663    Author: Liang Xie, 2013-12-19, 19:54
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