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Region server crash while syncing HLog - HBase - [mail # user]
...Hi,  I had 2 region servers crash with this (running hbase-0.94.3 with hadoop-2.0.0). There is also stuff saying that Memstore was rolled back. Is this some kind of data loss happening ...
   Author: Varun Sharma, 2013-01-23, 17:57
About HBase Region Flushes - HBase - [mail # user]
...Hi,  I have a question about hbase region flushes. Are reads and writes blocked while the memstore is being flushed ?  Thanks !...
   Author: Varun Sharma, 2013-01-23, 00:13
Re: Storing images in Hbase - HBase - [mail # user]
...On Mon, Jan 21, 2013 at 5:10 PM, Varun Sharma  wrote:  ...
   Author: Varun Sharma, 2013-01-22, 01:12
Re: Hbase heap size - HBase - [mail # user]
...I meant controlling compaction activity by emitting fewer hfiles but of larger size.  On Fri, Jan 18, 2013 at 12:28 PM, Adrien Mogenet wrote:  ...
   Author: Varun Sharma, 2013-01-18, 20:43
Re: Coprocessor / threading model - HBase - [mail # user]
...You should look at the jstack - I think HTablePool is the reason for the large number of threads. Note that HTablePool is a reusable pool HTable(s) and each HTable consists of an ExecutorSer...
   Author: Varun Sharma, 2013-01-15, 18:56
Re: Increment operations in hbase - HBase - [mail # user]
...IMHO, this seems too low - 1 million operations in 15 minutes translates to 2K increment operations per second which should be easy to support. Moreover, you are running increments on differ...
   Author: Varun Sharma, 2013-01-12, 20:20
Re: Where to place logs - HBase - [mail # user]
...Thanks for the tip. I was just wondering what people have done in the past - do people typically reserve a separate disk for logging activity ?  Thanks Varun  On Wed, Dec 26, 2012 ...
   Author: Varun Sharma, 2012-12-28, 08:51
Re: Hbase scalability performance - HBase - [mail # user]
...Note that adding nodes will improve throughput and not latency. So, if your client application for benchmarking is single threaded, do not expect an improvement in number of reads per second...
   Author: Varun Sharma, 2012-12-22, 16:50
Re: recommended nodes - HBase - [mail # user]
...Hmm, I thought that RAID0 simply stripes across all disks. So if you got 4 disks - an HFile block for example could get striped across 4 disks. So to read that block, you would need all 4 of...
   Author: Varun Sharma, 2012-12-20, 21:37
[HBASE-7313] ColumnPaginationFilter should reset count when moving to NEXT_ROW - HBase - [issue]
...ColumnPaginationFilter does not reset count to zero on moving to next row. Hence, if we have already gotten "limit" number of columns - the subsequent rows will always return 0 columns....
http://issues.apache.org/jira/browse/HBASE-7313    Author: Varun Sharma, 2012-12-19, 06:06
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