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Re: HDFS Ports - HDFS - [mail # user]
...The read port of data node is random, but I think you can forbid the port on namenode becuase each read operation should access namenode first.  On Fri, Sep 3, 2010 at 12:53 AM, Stephan...
   Author: Jeff Zhang, 2010-09-03, 08:13
Where is reflection_limited_types.h in Thrift for Cpp - HDFS - [mail # user]
...Hi all,  I'd like to use the cpp thrift of hdfs, but find that there's no reflection_limited_types.h which is included by hadoopfs_types.h     Best Regards  Jeff Zhang...
   Author: Jeff Zhang, 2010-07-20, 07:54
Re: Debug HDFS - HDFS - [mail # dev]
...You can debug MiniDFSCluster which is for unit test of HDFS.    On Mon, Jul 5, 2010 at 8:53 AM, Alberich de megres wrote:     Best Regards  Jeff Zhang...
   Author: Jeff Zhang, 2010-07-05, 16:05
Who will interrupt PacketResonpder Thread ? - HDFS - [mail # user]
...Hi all,  In my data node logs, it says PacketResponder is interrupt,and it cuase my data node to re-register to namenode. The following is the log:  (Anyone has any clues ? Thanks ...
   Author: Jeff Zhang, 2010-07-05, 05:30
Source Code Question about blockReport - HDFS - [mail # dev]
...Hi Hadoop Devs,  I have one question about the blockReport DataNode send to NameNode. I think NameNode get the blockReport from DataNode, then it can tell DataNode which block is invali...
   Author: Jeff Zhang, 2010-06-22, 05:59
[expand - 2 more] - Re: How to make command setrepr take effect on data node ? - HDFS - [mail # user]
...So when will the replication happen ? Do you know which part of code control the replication ? Thanks.    On Sun, Jun 13, 2010 at 11:10 AM, Eric Sammer  wrote:    Be...
   Author: Jeff Zhang, 2010-06-13, 03:18
[expand - 1 more] - Re: Is it necessary to cache metadata in client side? - HDFS - [mail # user]
...Per inputstream means the cache can only been used in the scope of one file. I think it's will be better if there's a cache in DFSClient.    On Fri, Jun 11, 2010 at 5:02 PM, Todd L...
   Author: Jeff Zhang, 2010-06-11, 09:17
[expand - 1 more] - Re: Is it safe enough to write edit log in buffer before writing to disk ? - HDFS - [mail # user]
...Thanks, Todd. I saw the flush code.    On Fri, Jun 11, 2010 at 9:31 AM, Todd Lipcon  wrote:    Best Regards  Jeff Zhang...
   Author: Jeff Zhang, 2010-06-11, 01:41
[expand - 1 more] - Re: Is there any method to estimate how many files metadata I can store in name node ? - HDFS - [mail # user]
...Thanks Patrick。    On Thu, Jun 10, 2010 at 12:47 AM, Patrick Angeles  wr ote: n  to  is    Best Regards  Jeff Zhang...
   Author: Jeff Zhang, 2010-06-10, 08:07
Re: HDFS Source Code - HDFS - [mail # dev]
...I am also concerned with hdfs's code quality, Is there any plan of code re-factoring for hdfs ?    On Mon, Jun 7, 2010 at 8:25 PM, Vidur Goyal  wrote:    Best Regard...
   Author: Jeff Zhang, 2010-06-08, 04:14
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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