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Re: data loss due to regionserver going down - HBase - [mail # user]
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...When you shutdown the region server, check the master logs to see if master has detected this condition. I've seen weird things happen if dns is not setup correctly - so, check if master (lo...
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Author: Suraj Varma,
2011-07-27, 17:29
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Re: MR on HBase - java.io.IOException: Pass a Delete or a Put - HBase - [mail # user]
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...I found this older thread that _might_ help you ... but as Stack says, better to upgrade to 0.90.x if possible. http://search-hadoop.com/m/egk1n1T1Sw8/java.io.IOException%253A+Pass+a+Dele te...
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Author: Suraj Varma,
2011-07-26, 18:37
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Re: Multiple VM Arguments for daemons - HBase - [mail # user]
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...Check your regionserver's hbase-env.sh to see if you have accidentally duplicated the jmx lines in there. On Thu, Jun 23, 2011 at 8:45 AM, sulabh choudhury wrote me de se/logs ,...
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Author: Suraj Varma,
2011-06-23, 19:19
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Re: What the optimization method of when to delete Zk connection? - HBase - [mail # user]
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...How about using HTablePool - doesn't that work for you? http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/HTablePool.html On Tue, Jun 7, 2011 at 2:23 AM, bijieshan ...
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Author: Suraj Varma,
2011-06-08, 02:30
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Re: iew data in hbase tables - HBase - [mail # user]
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...See these threads: http://search-hadoop.com/m/vZwR4BIimP/hbaseexplorer&subj=Re+HBase+Admin+Web+UI http://search-hadoop.com/m/oQ4po1kEoBZ/hbaseexplorer&subj=Web+based+Hbase+Query+Tool+ http:/...
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Author: Suraj Varma,
2011-06-08, 02:21
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Re: How to scan rows starting with a particular string? - HBase - [mail # user]
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...Why did you feel this is error prone? If you use server side filters by providing start/end Row or use a PrefixFilter, the scans should work well, as it is going to be sequential access. Dep...
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Author: Suraj Varma,
2011-04-26, 14:05
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Re: Migrating pseudo distribute map reduce with user jar file to 0.90.1 - HBase - [mail # user]
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...With CDH3B4, the hadoop processes run as separate users (like hdfs, mapred, etc). Did you set the CDH3B4 directory permissions correctly as described in the install document? See: https://cc...
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Author: Suraj Varma,
2011-04-26, 05:02
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Re: Should I be afraid by 'put','get'... - HBase - [mail # user]
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...Here's a recent thread that also gives you some numbers from OpenTSDB. http://search-hadoop.com/m/Rwf0d16qeo81/hbase+performance&subj=HBase+Performance On Sun, Apr 24, 2011 at 12:20 AM...
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Author: Suraj Varma,
2011-04-24, 07:24
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Re: Should I be afraid by 'put','get'... - HBase - [mail # user]
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...The only real way to find this out for your application is to do your own performance testing - this is because the numbers are totally dependent on your data size, number of requests, hardw...
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Author: Suraj Varma,
2011-04-24, 07:20
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Re: HBase - Column family - HBase - [mail # user]
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...If you only want some of the columns, you could return a subset by using server side Filters. Your schema can be designed in multiple ways - it all depends on what your access patterns...
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Author: Suraj Varma,
2011-04-24, 06:58
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