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Re: Coprocessors and batch processing - HBase - [mail # user]
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...Client side batch processing is done at RegionServer level, i.e., all Action objects are grouped together per RS basis and send in one RPC. Once the batch arrives at a RS, it gets distribute...
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Author: Himanshu Vashishtha,
2011-08-11, 06:21
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Re: Hbase performance with HDFS - HBase - [mail # user]
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...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: ...
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Author: Himanshu Vashishtha,
2011-07-07, 18:59
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Re: Socket Timeout Exception when executing coprocessor - HBase - [mail # user]
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...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...
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Author: Himanshu Vashishtha,
2011-06-29, 23:08
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Re: Best practices for HBase in EC2? - HBase - [mail # user]
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...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...
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Author: Himanshu Vashishtha,
2011-06-23, 21:33
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Re: tech. talk at imageshack/yfrog - HBase - [mail # user]
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...+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...
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Author: Himanshu Vashishtha,
2011-06-08, 15:24
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Re: full table scan - HBase - [mail # user]
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...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 ...
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Author: Himanshu Vashishtha,
2011-06-06, 19:41
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Re: Best practices for HBase in EC2? - HBase - [mail # user]
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...should add the disclaimer: That this is not the best possible way! :)) There are some ruby scripts too (in the same repo, look for recipes directory), and your cluster is up and running just...
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Author: Himanshu Vashishtha,
2011-06-04, 19:16
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Re: Best practices for HBase in EC2? - HBase - [mail # user]
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...I used ec2, but just for experiments. Here is what I did: a) used the ephemeral disks. My experiment datasets were persisted on S3, and I copied them onto the cluster. b) Use the hbase...
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Author: Himanshu Vashishtha,
2011-06-04, 19:02
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Coprocessor experiments - HBase - [mail # dev]
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...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...
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Author: Himanshu Vashishtha,
2011-05-27, 01:40
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Re: Hbase 2077 status? - HBase - [mail # user]
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...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...
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Author: Himanshu Vashishtha,
2011-05-19, 23:13
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