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[HDFS-4754] Add an API in the namenode to mark a datanode as stale - HDFS - [issue]
...There is a detection of the stale datanodes in HDFS since HDFS-3703, with a timeout, defaulted to 30s.There are two reasons to add an API to mark a node as stale even if the timeout is not y...
http://issues.apache.org/jira/browse/HDFS-4754    Author: Nicolas Liochon, 2013-10-18, 09:53
[HDFS-3705] Add the possibility to mark a node as 'low priority' for read in the DFSClient - HDFS - [issue]
...This has been partly discussed in HBASE-6435.The DFSClient includes a 'bad nodes' management for reads and writes. Sometimes, the client application already know that some deads are dead or ...
http://issues.apache.org/jira/browse/HDFS-3705    Author: Nicolas Liochon, 2013-10-15, 10:06
[HDFS-3702] Add an option for NOT writing the blocks locally if there is a datanode on the same box as the client - HDFS - [issue]
...This is useful for Write-Ahead-Logs: these files are writen for recovery only, and are not read when there are no failures.Taking HBase as an example, these files will be read only if the pr...
http://issues.apache.org/jira/browse/HDFS-3702    Author: Nicolas Liochon, 2013-07-26, 16:31
[HDFS-3706] Add the possibility to mark a node as 'low priority' for writes in the DFSClient - HDFS - [issue]
...This could be a solution for HDFS-3702, but it's as well useful in the HBase recovery process described in HDFS-3705: the recovery process is a time critical process, so if we could save wri...
http://issues.apache.org/jira/browse/HDFS-3706    Author: Nicolas Liochon, 2013-04-25, 14:18
[HDFS-3703] Decrease the datanode failure detection time - HDFS - [issue]
...By default, if a box dies, the datanode will be marked as dead by the namenode after 10:30 minutes. In the meantime, this datanode will still be proposed  by the nanenode to write block...
http://issues.apache.org/jira/browse/HDFS-3703    Author: Nicolas Liochon, 2013-04-20, 02:45
Re: Datanodes shutdown and HBase's regionservers not working - HDFS - [mail # user]
...Network error messages are not always friendly, especially if there is a misconfiguration. This said,  "connection refused" says that the network connection was made, but that the remot...
   Author: Nicolas Liochon, 2013-02-25, 12:01
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