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Re: problem about starting datanode - HDFS - [mail # user]
...You have one datanode data volume (dfs.datanode.data.dir) configured, but you've specified tolerated failures as 3. The state of 3 > 1 is invalid and hence the error. You cannot enable di...
   Author: Harsh J, 2013-07-26, 05:48
Re: issure about create fence method - HDFS - [mail # user]
...The fencing happens at the NameNodes, so I guess just on the two NNs should suffice.  On Fri, Jul 26, 2013 at 6:26 AM, ch huang  wrote:    Harsh J...
   Author: Harsh J, 2013-07-26, 03:02
Re: issure about config namenode HA - HDFS - [mail # user]
...If you have already configured QJM for NN's edits storage, then yes, it needs to be available.  On Fri, Jul 26, 2013 at 8:24 AM, ch huang  wrote:    Harsh J...
   Author: Harsh J, 2013-07-26, 03:00
[HDFS-3302] Review and improve HDFS trash documentation - HDFS - [issue]
...Improve Trash documentation for users.(0.23 published release docs are missing original HDFS docs btw...)A set of FAQ-like questions can be found on HDFS-2740I'll update the ticket shortly w...
http://issues.apache.org/jira/browse/HDFS-3302    Author: Harsh J, 2013-07-25, 21:37
Re: Get the tree structure of a HDFS dir, similar to dir/files - HDFS - [mail # user]
...The FileSystem interface provides a recursive option for this. See http://hadoop.apache.org/docs/current/api/org/apache/hadoop/fs/FileSystem.html#listFiles(org.apache.hadoop.fs.Path,%20boole...
   Author: Harsh J, 2013-07-24, 05:24
Re: Two simple question about hadoop 2 - HDFS - [mail # user]
...Hi,  On Mon, Jul 22, 2013 at 7:26 AM, Yexi Jiang  wrote:  No fixed date yet, but probably later this year. There is a formal beta that should release soon (2.1.0-beta), which ...
   Author: Harsh J, 2013-07-22, 05:54
[HDFS-4278] Log an ERROR when DFS_BLOCK_ACCESS_TOKEN_ENABLE config  is disabled but security is turned on. - HDFS - [issue]
...When enabling security, one has to manually enable the config DFS_BLOCK_ACCESS_TOKEN_ENABLE (dfs.block.access.token.enable). Since these two are coupled, we could make it turn itself on auto...
http://issues.apache.org/jira/browse/HDFS-4278    Author: Harsh J, 2013-07-19, 08:45
Re: Fault tolerance and Speculative Execution - HDFS - [mail # user]
...The finer grained controls are available in 2.x MR2 today. Pretty sure they weren't deprecated/removed, but may have been replaced by better names.  On Thu, Jul 18, 2013 at 11:07 PM, Ge...
   Author: Harsh J, 2013-07-19, 02:03
Re: QJM for federation - HDFS - [mail # user]
...Yeah ideally you needn't configure a local edits directory, unless you want extra safety. There was an issue where it still gets configured and logs local edits though but am not sure if thi...
   Author: Harsh J, 2013-07-17, 09:17
Re: Can I move block data directly? - HDFS - [mail # dev]
...Eitan,  The block to host mapping isn't persisted in the metadata. This is also the reason why the steps include a restart, which will re-trigger a block report (and avoid gotchas) that...
   Author: Harsh J, 2013-07-09, 00:50
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NEW: Monitor These Apps!
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