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Re: max concurrent connection to HDFS name node - HDFS - [mail # dev]
...The NN can do somewhere around 30,000 - 50,000 RPCs per secondcurrently, depending on configuration.  In general you do not want tohave extremely high NN RPC traffic, because it will sl...
   Author: Colin McCabe, 2015-02-12, 22:06
Re: NFSv3 Filesystem Connector - HDFS - [mail # dev]
...Why not just use LocalFileSystem with an NFS mount (or several)?  I readthrough the README but I didn't see that question answered anywhere.best,ColinOn Tue, Jan 13, 2015 at 1:35 PM, Go...
   Author: Colin McCabe, 2015-01-14, 18:48
Re: Symbolic links disablement - HDFS - [mail # dev]
...As far as I know, nobody is working on this at the moment.  There area lot of issues that would need to be worked through before we couldenable symlinks in production.We never quite agr...
   Author: Colin McCabe, 2015-01-01, 00:13
Re: Why do reads take as long as replicated writes? - HDFS - [mail # dev]
...I strongly suggest benchmarking a modern version of Hadoop rather thanHadoop 1.x.  The native CRC stuff from HDFS-3528 greatly reduces CPUconsumption on the read path.  I wrote abo...
   Author: Colin McCabe, 2014-11-10, 18:54
[expand - 1 more] - Re: builds failing on H9 with "cannot access java.lang.Runnable" - HDFS - [mail # dev]
...Thanks, Andrew and Giridharan.ColinOn Fri, Oct 3, 2014 at 1:20 PM, Andrew Bayer  wrote: ...
   Author: Colin McCabe, 2014-10-03, 22:57
[expand - 2 more] - Re: [VOTE] Merge HDFS-6581 to trunk - Writing to replicas in memory. - HDFS - [mail # dev]
...On Wed, Sep 24, 2014 at 4:03 PM, Arpit Agarwal  wrote:Thank you for the offer.  I am OK with the current vote expirationtime, now that we've seen more benchmarks and discussed more...
   Author: Colin McCabe, 2014-09-25, 01:24
[expand - 1 more] - Re: [DISCUSS] Allow continue reading from being-written file using same stream - HDFS - [mail # dev]
...On Fri, Sep 19, 2014 at 9:41 AM, Vinayakumar B  wrote:I think DFSInputStream#available would be a lot more useful if it toldusers how much data could be read without doing network I/O. ...
   Author: Colin McCabe, 2014-09-19, 17:03
Re: In hindsight... Re: Thinking ahead to hadoop-2.6 - HDFS - [mail # dev]
...On Mon, Sep 15, 2014 at 10:48 AM, Allen Wittenauer  wrote:I don't see what is so scary about 2.6, can you be more concrete?  Itseems like a pretty normal release to me and most of ...
   Author: Colin McCabe, 2014-09-15, 18:18
Re: Updates on migration to git - HDFS - [mail # dev]
...Thanks for making this happen, Karthik and Daniel.  Great job.best,ColinOn Tue, Aug 26, 2014 at 5:59 PM, Karthik Kambatla  wrote: ...
   Author: Colin McCabe, 2014-08-27, 20:43
Re: HDFS-6902 FileWriter should be closed in finally block in BlockReceiver#receiveBlock() - HDFS - [mail # dev]
...Let's discuss this on the JIRA.  I think Tsuyoshi OZAWA's solution is good.ColinOn Thu, Aug 21, 2014 at 7:08 AM, Ted Yu  wrote: ...
   Author: Colin McCabe, 2014-08-25, 22:50
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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