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[expand - 2 more] - Re: Can I move block data directly? - MapReduce - [mail # user]
...Yeah you're right. I only meant the ownership of the blk_* files to be owned by the same user as the DN daemon, for consistency more than anything else.  On Mon, Jul 8, 2013 at 11:46 AM...
   Author: Harsh J, 2013-07-08, 07:10
[expand - 1 more] - Re: How to update a file which is in HDFS - MapReduce - [mail # user]
...If it is 1k new records at the "end of the file" then you may extract them out and append the existing file in HDFS. I'd recommend using HDFS from Apache Hadoop 2.x for this purpose.  O...
   Author: Harsh J, 2013-07-05, 10:54
Re: DistCp fails on open files - MapReduce - [mail # user]
...Hi,  If you are looking to make it ignore those files, you can probably consider using the "-i" flag.  On Thu, Jul 4, 2013 at 6:51 PM, Manuel de Ferran  wrote:    Ha...
   Author: Harsh J, 2013-07-05, 10:44
Re: Which InputFormat to use? - MapReduce - [mail # user]
...Whichever you pick, both are supported right now and pretty much offer the same functionality. FWIW though, Pig and HBase both use the new APIs.  On Fri, Jul 5, 2013 at 11:30 AM, Azuryy...
   Author: Harsh J, 2013-07-05, 10:35
Re: java.lang.UnsatisfiedLinkError - Unable to load libGfarmFSNative library - MapReduce - [mail # user]
...Is "libgfarm.so.1" installed and available on all systems? You're facing a link error though hadoop did try to load the library it had ( libGfarmFSNative.so). If the "gfarm" guys have a mail...
   Author: Harsh J, 2013-06-27, 02:44
Re: Exception in createBlockOutputStream - poss firewall issue - MapReduce - [mail # user]
...Clients will read/write data to the DNs directly. DNs serve on port 50010 and 50020 by default. Please open up these ports, aside of the NN's RPC ports, to be able to read/write data.  ...
   Author: Harsh J, 2013-06-27, 02:41
Re: which hadoop version i can choose in production env? - MapReduce - [mail # user]
...Re: HDFS2 - FWIW, we've been supporting customers' prod clusters powered by HDFS2 (mostly in HA with QJM) for close to a year now and its done extremely well. Plus the HA is rather good for ...
   Author: Harsh J, 2013-06-25, 15:18
Re: DFS Permissions on Hadoop 2.x - MapReduce - [mail # user]
...This is a HDFS bug. Like all other methods that check for permissions being enabled, the client call of setPermission should check it as well. It does not do that currently and I believe it ...
   Author: Harsh J, 2013-06-19, 03:40
Re: how to close hadoop when tmp files were cleared - MapReduce - [mail # user]
...Hey Azuryy,  The -9 (SIGKILL) is unnecessary and isn't recommended unless its unresponsive. The SIGTERM has an additional benefit of running any necessary shutdown handling procedures, ...
   Author: Harsh J, 2013-06-17, 09:09
Re: HDFS file reader and buffering - MapReduce - [mail # user]
...Yes they do maintain a buffer equal to the configurable size of io.file.buffer.size (4k default) for both reads and writes.  On Sun, Jun 16, 2013 at 7:03 PM, John Lilley  wrote: &n...
   Author: Harsh J, 2013-06-16, 15:06
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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