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Re: SingleColumnValueFilter for empty column qualifier - HBase - [mail # user]
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...Hi Jonathan, Then in that case SingleColumnValueFilter will not work. SingleColumnValueFilter works on the value of a cell rather than ColumnQualifier name. I have never heard of a bui...
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Author: anil gupta,
2012-11-01, 02:38
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Re: SingleColumnValueFilter for empty column qualifier - HBase - [mail # user]
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...Hi Jonathan, Do you mean that cell value is ""? or column qualifier is ""? I am confused by your description. If you were talking about cell value, at the time of put which object do y...
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Author: anil gupta,
2012-10-31, 22:22
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Re: Best technique for doing lookup with Secondary Index - HBase - [mail # user]
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...Hi Danis, I downloaded the zip file and copied the source code to my HBase0.92.1 project. It compiled successfully. I am going through the source code right now. Is it possible for you...
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Author: anil gupta,
2012-10-26, 16:43
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Re: Best technique for doing lookup with Secondary Index - HBase - [mail # user]
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...@fding hbase: thanks for the link. I'll look into it. Interesting to know that within a region server we dont need a RPC call. If we can collocate two regions(or more) then that is the...
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Author: anil gupta,
2012-10-26, 15:14
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Re: Best technique for doing lookup with Secondary Index - HBase - [mail # user]
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...In secondary index its hard to avoid at-least two RPC calls(1 from client to table B and then from table B to Table A) whether you use coproc or not. But, i believe using coproc is better th...
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Author: anil gupta,
2012-10-26, 06:46
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Re: Best technique for doing lookup with Secondary Index - HBase - [mail # user]
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...Hi Anoop, Yes i use bulk loading for loading table A. I wrote my own mapper as Importtsv wont suffice my requirements. :) No, i dont call HTable#put() from my mapper. I was thinking ab...
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Author: anil gupta,
2012-10-26, 04:44
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Re: Best technique for doing lookup with Secondary Index - HBase - [mail # user]
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...Anoop: In prePut hook u call HTable#put()? Anil: Yes i call HTable#put() in prePut. Is there better way of doing it? Anoop: Why use the network calls from server side here then? ...
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Author: anil gupta,
2012-10-25, 22:10
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Re: Hbase import Tsv performance (slow import) - HBase - [mail # user]
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...@Jonathan, As per Anoop and Ram, WAL is not used with bulk loading so turning off WAL wont have any impact on performance. On Thu, Oct 25, 2012 at 1:33 PM, anil gupta wrote...
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Author: anil gupta,
2012-10-25, 20:35
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Re: Hbase import Tsv performance (slow import) - HBase - [mail # user]
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...Hi Nicolas, As per my experience you wont get good performance if you run 3 Map task simultaneously on one Hard Drive. That seems like a lot of I/O on one disk. HBase performs we...
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Author: anil gupta,
2012-10-25, 20:33
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Best technique for doing lookup with Secondary Index - HBase - [mail # user]
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...Hi All, I am using HBase 0.92.1. I have created a secondary index on table "A". Table A stores immutable data. I build the secondary table "B" using a prePut RegionObserver. The ...
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Author: anil gupta,
2012-10-24, 21:40
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