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[HDFS-6010] Make balancer able to balance data among specified servers - HDFS - [issue]
...Currently, the balancer tool balances data among all datanodes. However, in some particular case, we would need to balance data only among specified nodes instead of the whole set.In this JI...
http://issues.apache.org/jira/browse/HDFS-6010    Author: Yu Li, 2014-07-31, 08:01
[HDFS-6009] Tools based on favored node feature for isolation - HDFS - [issue]
...There're scenarios like mentioned in HBASE-6721 and HBASE-4210 that in multi-tenant deployments of HBase we prefer to specify several groups of regionservers to serve different applications,...
http://issues.apache.org/jira/browse/HDFS-6009    Author: Yu Li, 2014-03-14, 16:12
Please help review HDFS-6009: tools for datanode-level io isolation - HDFS - [mail # dev]
...Dear all,In our product env we find a need to do some datanode-level io isolation,and worked out a solution using favored node(HDFS-2576). Simply speaking,we arrange logical datanode group f...
   Author: Yu Li, 2014-02-25, 11:33
[HDFS-6012] Tool for checking whether all blocks under a path are placed on specified nodes - HDFS - [issue]
...As mentioned in HDFS-6009, if datanodes are grouped for isolation purpose, we need to check whether there're "cross-group" placed blocks for a specified path, and move those cross-group bloc...
http://issues.apache.org/jira/browse/HDFS-6012    Author: Yu Li, 2014-02-25, 09:21
[HDFS-6011] Make it able to specify balancer bandwidth for specified nodes - HDFS - [issue]
...Currently, we can only specify balancer bandwidth for all datanodes. However, in some particular case, we would need to balance data only among specified nodes thus don't need to throttle ba...
http://issues.apache.org/jira/browse/HDFS-6011    Author: Yu Li, 2014-02-25, 02:55
[expand - 1 more] - Re: Is there a way to get a Block through block id? - HDFS - [mail # dev]
...Hi Colin,  Thanks for the reply. I guess you're referring to the below methods? If so, I'm afraid it can only get an empty block but not the real block I really want to move. ==========...
   Author: Yu Li, 2014-01-22, 06:00
[HDFS-5706] Should reset Balancer.Parameters.DEFALUT.policy in TestBalancer - HDFS - [issue]
...Now in TestBalancer.java, more than one test case will invoke the private method runBalancer, in which it will use Balancer.Parameters.Default, while the policy is never reset thus its total...
http://issues.apache.org/jira/browse/HDFS-5706    Author: Yu Li, 2013-12-30, 06:02
[HDFS-4720] Misleading warning message in WebhdfsFileSystem when trying to check whether path exist using webhdfs url - HDFS - [issue]
...When we trying to check whether the target path exists in HDFS through webhdfs, if the given path to check doesn't exist, we will always observe warning message like:========================...
http://issues.apache.org/jira/browse/HDFS-4720    Author: Yu Li, 2013-09-26, 01:46
[HDFS-5022] Add explicit error message in log when datanode went out of service because of free disk space hit "dfs.datanode.du.reserved" - HDFS - [issue]
...Currently, if "dfs.datanode.du.reserved" is set and a datanode run out of configured disk space, it will become out of service silently, there's no way for user to analyze what happened to t...
http://issues.apache.org/jira/browse/HDFS-5022    Author: Yu Li, 2013-07-24, 12:02
Any existing work on backport HDFS-245 into branch 1? - HDFS - [mail # dev]
...Dear all,  AFAIK, the symbolic feature only exists in 0.21, 0.22, 2.0 or trunk, and not supported in branch-1, but since branch-1 is the current stable version and symbolic an important...
   Author: Yu Li, 2013-03-20, 09:40
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