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[expand - 6 more] - Re: experiencing high latency for few reads in HBase - HBase - [mail # user]
...I did check GC earlier. Not much . About .0x seconds. I think there is lock/contention issue. 0.94.11 is also more stable compared to 0.94.10. With 64 concurrent clients, 0.94.10 one regions...
   Author: Kiru Pakkirisamy, 2013-08-30, 08:36
[expand - 1 more] - Re: Region server exception - HBase - [mail # user]
...Ted, When there are more than 32 concurrent clients (in a 4 nodes x 8 core cluster). I keep getting responseTooSlow for my coprocessors. Our app is built mainly using coprocessor and a few m...
   Author: Kiru Pakkirisamy, 2013-08-29, 20:56
[expand - 1 more] - Re: Coprocessor responseTooSlow error messages - HBase - [mail # user]
...Ted, There are no error message. Only a WARN. It lists all the arguments to the call.  It seems like a resource configuration issue. I am unable to get past 60 concurrent clients or so. And ...
   Author: Kiru Pakkirisamy, 2013-08-28, 20:32
Region locality and core/thread availability - HBase - [mail # user]
... I think my app wants to hit a particular region all the time. Since my table is only read-only (lookup). I have created more than one and randomly pick one to use. This way I can load ...
   Author: Kiru Pakkirisamy, 2013-08-27, 23:16
[expand - 1 more] - Re: FuzzyRowFilter question - HBase - [mail # user]
...Thanks Ted, it is explicitly mentioned in the limitations section but I seem to have missed it .. oh well. It is an awesome filter.. great work by Alex, you and the team. Thanks to you all. ...
   Author: Kiru Pakkirisamy, 2013-08-26, 09:07
[expand - 11 more] - Re: Client Get vs Coprocessor scan performance - HBase - [mail # user]
...James, I have only one family -cp. Yes, that is how I store the Double. No, the doubles are always positive. The keys are "A14568 " Less than a million and I added the alphabets to randomize...
   Author: Kiru Pakkirisamy, 2013-08-19, 08:36
Re: issue about rowkey design - HBase - [mail # user]
...We did design with something equivalent to userid as the key and all the user sessions in there.  But when we tried to look for particular user sessions within a time range, we found the Col...
   Author: Kiru Pakkirisamy, 2013-08-16, 16:48
Re: regionserver died when using Put to insert data - HBase - [mail # user]
...Yes, HFile is the way to go for large amounts of data. Splitting things into column families will help us well. If you also ensure, that you use only a certain family or 2 at a time, it will...
   Author: Kiru Pakkirisamy, 2013-08-14, 18:14
[expand - 2 more] - Re: Hadoop-HBase table hierarchical column scan - HBase - [mail # user]
...Lars, We could be having anywhere between 1000-40000 columns in there. I do have setup the bloomfilter on this column family as 'rowcol'. There are no writes at all in this app.  Maybe, the ...
   Author: Kiru Pakkirisamy, 2013-08-10, 05:12
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB