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Re: IncompatibleClassChangeError - HDFS - [mail # user]
...Yes, My job is compiled in CHD3u3, and I run the job on CDH4.3.1,  but I use the mr1 of CHD4.3.1 to run the job.  What are the different mr1 of cdh4 and mr of cdh3?  Thanks, &...
   Author: lei liu, 2013-09-30, 03:29
[expand - 1 more] - Re: metric type - HDFS - [mail # user]
...Hello,  Can anybody answer the question?   2013/9/1 lei liu  ...
   Author: lei liu, 2013-09-06, 06:05
hadoop2 and Hbase0.94 - HDFS - [mail # user]
...I use hadoop2 and hbase0.94, but there is below exception:  2013-08-28 11:36:12,922 ERROR [MASTER_TABLE_OPERATIONS-dw74.kgb.sqa.cm4,13646,1377660964832-0] executor.EventHandler(172): Ca...
   Author: lei liu, 2013-08-28, 08:36
Re: hsync is too slower than hflush - HDFS - [mail # dev]
...Hi all,  DataNode sequential write file, so I think the disk seek time should be very small.Why is disk seek time 10ms? I think that is too long. Whether we can optimize the linux syste...
   Author: lei liu, 2013-08-26, 14:30
Re: when Standby Namenode is doing checkpoint, the Active NameNode is slow. - HDFS - [mail # user]
...The fsimage file size is 1658934155   2013/8/13 Harsh J  ...
   Author: lei liu, 2013-08-13, 06:22
Re: ./hdfs namenode -bootstrapStandby error - HDFS - [mail # user]
...Hi, Azuryy  Running the 'hdfs namenode -initializeSharedEdits'  command on the active NN ,  I must to stop the Active NameNode.  I  think when  excuting the "./...
   Author: lei liu, 2013-07-21, 04:05
[expand - 2 more] - Re: QJM for federation - HDFS - [mail # user]
...I have another question for QJM.  If I use QJM for HA, do I need to save edit log  on the local filesystem?  I think the QJM is high availability for edit log, so I don't need...
   Author: lei liu, 2013-07-17, 08:49
QJM and dfs.namenode.edits.dir - HDFS - [mail # user]
...When I use QJM for HA, do I need to save edit log  on the local filesystem?  I think the QJM is high availability for edit log, so I don't need to configuration the dfs.namenode.ed...
   Author: lei liu, 2013-07-17, 06:07
HDFS pread performance - HDFS - [mail # dev]
...I test the HDFS pread performance, the avg time of pread is about 10ms, but  pread max time reach 200ms, there is about one percent of pread time is 200ms, that result to my application...
   Author: lei liu, 2013-04-17, 13:54
[expand - 1 more] - Re: DFSOutputStream.sync() method latency time - HDFS - [mail # user]
...Thanks Yanbo for your reply.  I  test code are :         FSDataOutputStream outputStream = fs.create(path);         Random r = new Random();...
   Author: lei liu, 2013-03-29, 02:50
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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