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Re: Coprocessor execution - HBase - [mail # user]
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...Hello, Any info about specific numbers (number of regions vs response time, etc) will help. Btw, for rowcount, you should use FirstKeyOnlyFilter. And in your code, you should add...
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Author: Himanshu Vashishtha,
2012-03-21, 15:55
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Re: Scan.addFamiliy reduces results - HBase - [mail # user]
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..." Let's also say there are 1000 rows with A,B,C and 500 rows with only B an d C. If I add families A, B and C and scan with no filter will I get 1500, 1000 or 500 results?" In th...
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Author: Himanshu Vashishtha,
2012-03-15, 18:42
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[HBASE-5486] Warn message in HTable: Stringify the byte[] - HBase - [issue]
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...The warn message in the method getStartEndKeys() in HTable can be improved by stringifying the byte array for Regions.QualifierCurrently, a sample message is like :12/01/17 16:36:34 WARN cli...
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http://issues.apache.org/jira/browse/HBASE-5486
Author: Himanshu Vashishtha,
2012-03-06, 01:30
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HBase Replication: clarification needed - HBase - [mail # dev]
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...Hello All, I am looking at the replication functionality in HBase from the perspective of failover/failback mechanisms, i.e., fail over to a slave cluster in case the master (or primar...
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Author: Himanshu Vashishtha,
2012-02-24, 21:08
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Re: AggregateProtocol Help - HBase - [mail # user]
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...On Tue, Jan 3, 2012 at 11:00 AM, Ted Yu wrote: Yeah...And a null is returned from the Region (though the log says 0: using different variables) resulting in a npe at the client ...
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Author: Himanshu Vashishtha,
2012-01-03, 18:14
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Re: AggregateProtocol Help - HBase - [mail # user]
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...Hello Royston (and Tom), Its a bit confusing. -1 is defined in your code, and the default value (in case it was returning just default) from the RS is 0. Can you enable DEBUG at Region...
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Author: Himanshu Vashishtha,
2012-01-03, 17:11
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Re: AggregateProtocol Help - HBase - [mail # user]
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...Hello Royston, Sorry to hear that you are getting trouble while using Aggregation functionalities. 557k rows seems to be a small table and a SocketTimeout does not seem to be an ...
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Author: Himanshu Vashishtha,
2012-01-02, 01:18
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Re: Using Scans in parallel - HBase - [mail # user]
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...Interesting. Hey Bryan, can you please share the stats about: how many Regions, how many Region Servers, time taken by Serial scanner and with 8 parallel scanners. Himanshu ...
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Author: Himanshu Vashishtha,
2011-10-10, 02:00
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Re: speeding up rowcount - HBase - [mail # user]
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...MapReduce support in HBase inherently provides parallelism such that each Region is given to one mapper. Himanshu On Sun, Oct 9, 2011 at 6:44 PM, lars hofhansl wrote:...
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Author: Himanshu Vashishtha,
2011-10-10, 01:05
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Re: Using Scans in parallel - HBase - [mail # user]
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...I don't think it will work without exception in that case. These scanner Ids are generated from Random instance of HRegionServer. In case there is same scannerId then one will get a LeaseSti...
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Author: Himanshu Vashishtha,
2011-10-09, 22:06
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