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Parallel scan in HBase - HBase - [mail # user]
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...Hi there I have two question about scan in Hbase : 1) Does scan operation with specific filter run in parallel on different regionservers ? 2) I wanna know whether this code runs at client s...
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Author: Farrokh Shahriari,
2013-02-01, 13:52
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Re: Hbase Mapreduce- Problem in using arrayList of pust in MapFunction - HBase - [mail # user]
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...Tnx,But I don't know why when the client.buffer.size is increased, I've got bad result,does it related to other parameters ? and I give 8 gb heap to each regionserver. On Mon, Jan 21, ...
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Author: Farrokh Shahriari,
2013-01-21, 11:52
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Hbase Mapreduce- Problem in using arrayList of pust in MapFunction - HBase - [mail # user]
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...Hi there Is there any way to use arrayList of Puts in map function to insert data to hbase ? Because,the context.write method doesn't allow to use arraylist of puts,so in every map function ...
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Author: Farrokh Shahriari,
2013-01-21, 06:11
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Re: Tune MapReduce over HBase to insert data - HBase - [mail # user]
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...I've noticed that if I comment the write command in Map function ( Context.write(row,put)),it will just take 40 sec. The differences is about 30 seconds,that's weird for me,what do you think...
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Author: Farrokh Shahriari,
2013-01-16, 11:20
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Re: Tune MapReduce over HBase to insert data - HBase - [mail # user]
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...Bing Jiang, What do you mean by add compaction thread number ? Because, in Hbase-site.xml we have compactionqueuesize or compactionthreshold but not the parameter that you have said. T...
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Author: Farrokh Shahriari,
2013-01-14, 05:58
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Re: Tune MapReduce over HBase to insert data - HBase - [mail # user]
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...Thank you guys,let me change these configuration & test mapreduce again. On Tue, Jan 8, 2013 at 10:31 PM, Asaf Mesika wrote: ...
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Author: Farrokh Shahriari,
2013-01-13, 05:29
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Re: Tune MapReduce over HBase to insert data - HBase - [mail # user]
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...Hi again, I'm using HBase 0.92.1-cdh4.0.0. I have two server machine with 48Gb RAM,12 physical core & 24 logical core that contain 12 nodes(6 nodes on each server). Each node has 8Gb RAM & 2...
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Author: Farrokh Shahriari,
2013-01-08, 05:38
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Tune MapReduce over HBase to insert data - HBase - [mail # user]
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...Hi there I have a cluster with 12 nodes that each of them has 2 core of CPU. Now,I want insert large data about 2Gb in 80 sec ( or 6Gb in 240sec ). I've used Map-Reduce over hbase,but I can'...
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Author: Farrokh Shahriari,
2013-01-08, 05:05
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Re: why hbase doesn't provide Encryption - HBase - [mail # user]
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...Tnx Stack for giving your time to me. M.Zebeleh On Thu, Sep 6, 2012 at 10:06 AM, Stack wrote: ...
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Author: Farrokh Shahriari,
2012-09-06, 06:16
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Re: why hbase doesn't provide Encryption - HBase - [mail # user]
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...Hi there I want encryption before pushing data into hbase,and I've done it by changing in some library to encrypt data.But it doesn't have any performance,I mean for each row it should encry...
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Author: Farrokh Shahriari,
2012-09-06, 05:31
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