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[HDFS-6524] chooseDataNode decides retry times considering with block replica number - HDFS - [issue]
...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 bett...
http://issues.apache.org/jira/browse/HDFS-6524    Author: Liang Xie, 2014-06-13, 13:54
[HDFS-6109] let sync_file_range() system call run in background - 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, 2014-06-03, 16:54
[HDFS-6453] use Time#monotonicNow to avoid system clock reset - HDFS - [issue]
...similiar with hadoop-common, let's re-check and replace System#currentTimeMillis with Time#monotonicNow in HDFS project as well....
http://issues.apache.org/jira/browse/HDFS-6453    Author: Liang Xie, 2014-05-30, 16:18
[HDFS-6448] BlockReaderLocalLegacy should set socket timeout based on conf.socketTimeout - HDFS - [issue]
...Our hbase deployed upon hadoop2.0, in one accident, we hit HDFS-5016 in HDFS side, but we also found from HBase side, the dfs client was hung at getBlockReader, after reading code, we found ...
http://issues.apache.org/jira/browse/HDFS-6448    Author: Liang Xie, 2014-05-30, 16:18
[HDFS-6286] adding a timeout setting for local read io - HDFS - [issue]
...Currently, if a write or remote read requested into a sick disk, DFSClient.hdfsTimeout could help the caller have a guaranteed time cost to return back. but it doesn't work on local read. Ta...
http://issues.apache.org/jira/browse/HDFS-6286    Author: Liang Xie, 2014-05-28, 18:17
[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, 2014-05-27, 21:14
[HDFS-6284] don't let checkDiskError() run concurrently - HDFS - [issue]
...In current codebase, there're amount of  datanode.checkDiskError calls,  so it possible occurs that not a few threads call checkDiskError concurrently. IMHO, it'll be more reasonab...
http://issues.apache.org/jira/browse/HDFS-6284    Author: Liang Xie, 2014-04-25, 03:42
[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-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 / for block, add to...
http://issues.apache.org/jira/browse/HDFS-5637    Author: Liang Xie, 2014-02-03, 17:06
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elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB