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Re: [HBase] dummy cached location when batch insert result in bad performances. - HBase - [mail # user]
...The guide explains it well..  The region moves across RSs and splits of region will cause the location cache(at client) to be stale and it will look into META again.  The memory fl...
   Author: Anoop John, 2013-03-04, 16:28
Re: Eliminating duplicate values - HBase - [mail # user]
...Matt Corgan                  I remember, some one else also sent mail some days back looking for same use case Yes CP can help. May be do deletio...
   Author: Anoop John, 2013-03-03, 15:37
Re: Concurrently Reading Still Got Exceptions - HBase - [mail # user]
...Is this really related to concurrent reads?  I think some thing else.. Will dig into code tomorrow.  Can you attach a junit test case which will produce NPE.  -Anoop-   O...
   Author: Anoop John, 2013-03-02, 17:44
Re: queries and MR jobs - HBase - [mail # user]
...HBase data is ultimately persisted in HDFS and there it will be replicated in different nodes. But HBase table's each region will be associated with exactly one RS. So doing any operation on...
   Author: Anoop John, 2013-03-02, 16:00
[expand - 1 more] - Re: Co-Processor in scanning the HBase's Table - HBase - [mail # user]
...yes what Ted mentioned, u can try out..  -Anoop-  On Fri, Feb 22, 2013 at 7:46 PM, Ted  wrote:  ...
   Author: Anoop John, 2013-02-22, 18:04
Re: Exception while using HBase trunk with hadoop - 2.0.3 - HBase - [mail # dev]
...I am remembering that there was some discussion around use of dfs.setSafeMode() recently. Which issue I forgot  -Anoop-  On Thu, Feb 21, 2013 at 9:12 PM, Ted Yu  wrote:  ...
   Author: Anoop John, 2013-02-21, 15:48
Re: Pagination with HBase - getting previous page of data - HBase - [mail # user]
...10 and scan is done across two regions. 9 Results(satisfying the filter) are in Region1 and 10 Results(satisfying the filter) are in Region2. Then will this scan return 19 (9+10) results? &n...
   Author: Anoop John, 2013-02-03, 16:07
Re: Loading data, hbase slower than Hive? - HBase - [mail # user]
...In case of Hive data insertion means placing the file under table path in HDFS.  HBase need to read the data and convert it into its format. (HFiles) MR is doing this work..  So th...
   Author: Anoop John, 2013-01-17, 17:00
Re: best read path explanation - HBase - [mail # user]
...At a read time, if there are more than one HFile for a store, HBase will read that row from all the HFiles (check whether this row is there and if so read) and also from memstore.  So i...
   Author: Anoop John, 2013-01-13, 16:29
Re: Coprocessor / threading model - HBase - [mail # user]
...In your CP methods you will get ObserverContext object from which you can get HRS object. ObserverContext.getEnvironment().getRegionServerServices() Then directly call methods on HRegion to ...
   Author: Anoop John, 2013-01-13, 16:12
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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