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Re: Overwrite a row - HBase - [mail # user]
...You can use MultiRowMutationEndpoint for atomic op on multiple rows (within same region)..   On Sun, Apr 21, 2013 at 5:55 AM, Ted Yu  wrote:  ...
   Author: Anoop John, 2013-04-21, 07:39
Re: Essential column family performance - HBase - [mail # user]
...Agree here. The effectiveness depends on what % of data satisfies the condition, how it is distributed across HFile blocks. We will get performance gain when the we will be able to skip some...
   Author: Anoop John, 2013-04-08, 17:10
Re: Regionserver goes down while endpoint execution - HBase - [mail # user]
...I dont have any sample code to share with you.  Instead of calling HTable#put() from the postPut() impl, add these Put objects (Index table Put) to some Q and the CP flow immediately co...
   Author: Anoop John, 2013-03-26, 17:17
Re: Compaction problem - HBase - [mail # user]
...How many regions per  RS? And CF in table? What is the -Xmx for RS process? You will bget 35% of that memory for all the memstores in the RS. hbase.hregion.memstore.flush.size = 1GB!! &...
   Author: Anoop John, 2013-03-22, 14:51
Re: Is it feasible to delete qualified tombstones during minor compaction? - HBase - [mail # dev]
...Hi          I have seen some issue raised by Sergey regarding removing Delete markers during minor compaction. Not remembering the issue id and details :(  -Ano...
   Author: Anoop John, 2013-03-14, 16:22
[expand - 1 more] - Re: How HBase perform per-column scan? - HBase - [mail # user]
...As per the above said, you will need a full table scan on that CF. As Ted said, consider having a look at your schema design.  -Anoop-   On Sun, Mar 10, 2013 at 8:10 PM, Ted Yu &nb...
   Author: Anoop John, 2013-03-10, 15:53
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
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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