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Re: Coprocessor execution - HBaseServer: (responseTooSlow) java.nio.channels.ClosedChannelException - HBase - [mail # user]
...Hey Mayuresh! Can you try setting the Scan cache value to a good number (like a  few 100 or more)?  Cheers, Himanshu   On Mon, Sep 26, 2011 at 9:01 AM, Himanshu Vashishtha &nb...
   Author: Himanshu Vashishtha, 2011-09-26, 16:38
[expand - 1 more] - Re: how to make tuning for hbase (every couple of days hbase region sever/s crashe) - HBase - [mail # user]
...Sorry, I missed the fact that you guys were talking about the oome thing (the exceptions were of sockettimeout) Can you give the log snippet where it oome'd? I want to explore this use case ...
   Author: Himanshu Vashishtha, 2011-09-01, 00:28
[expand - 1 more] - Re: Coprocessors and batch processing - HBase - [mail # user]
...Hey Lars, Sorry if I have mislead you.  The current Coprocessor infrastructure is at _Region_ level, not at _RegionServer_ level. All these batch operations are ultimately ends up at so...
   Author: Himanshu Vashishtha, 2011-08-11, 18:39
Re: Hbase performance with HDFS - HBase - [mail # user]
...Mohit, just like how SSTables are stored on GFS? BigTable sstable => HBase HFile.  Does this help? Himanshu  On Thu, Jul 7, 2011 at 12:53 PM, Mohit Anchlia wrote:  ...
   Author: Himanshu Vashishtha, 2011-07-07, 18:59
Re: Socket Timeout Exception when executing coprocessor - HBase - [mail # user]
...Hey Nichole, you are doing something compute intensive at the region level in your coprocessors and it is not able to respond back with in the default client timeout of 60 sec. Aggregate Cop...
   Author: Himanshu Vashishtha, 2011-06-29, 23:08
[expand - 2 more] - Re: Best practices for HBase in EC2? - HBase - [mail # user]
...Hey Wilson, I will be rerunning experiments up there on ec2 and interested to know your experience about Whirr, in case you tried it. Interested in bash scripts vs Whirr thing for a scenario...
   Author: Himanshu Vashishtha, 2011-06-23, 21:33
Re: tech. talk at imageshack/yfrog - HBase - [mail # user]
...+1 to Matt's opinion (if possible?).  I am interested in your use case, sounds very impressive by the stats you gave. You said 1000 tables? Looking forward to see what optimizations/con...
   Author: Himanshu Vashishtha, 2011-06-08, 15:24
Re: full table scan - HBase - [mail # user]
...Also, How big is each row? Are you using scanner cache? You just fetching all the rows to the client, and?.  300k is not big (It seems you have 1'ish region, that could explain similar ...
   Author: Himanshu Vashishtha, 2011-06-06, 19:41
Coprocessor experiments - HBase - [mail # dev]
...I did some experiments using coprocessors and compare the result with vanilla scan, and in one case with mapreduce. I wrote up a blog about these experiments as it was getting a bit difficul...
   Author: Himanshu Vashishtha, 2011-05-27, 01:40
Re: Hbase 2077 status? - HBase - [mail # user]
...Hey, I am also facing the similar issue but in a different context (related to coprocessor), but that's a totally different use case (still need to look in to it).  But in this case, wi...
   Author: Himanshu Vashishtha, 2011-05-19, 23:13
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