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Re: Bulk loading (and/or major compaction) causing OOM - HBase - [mail # user]
...Merging is not an option for us, because we cannot afford to bring our cluster down.  Also, we are not yet convinced that our cluster can handle such large regions due to all the OOM is...
   Author: Bryan Beaudreault, 2012-12-08, 21:08
Re: Scan exception when running MR - HBase - [mail # user]
...Oh, sorry.  This sounds like a version mismatch.  Do you have the same version installed on your servers and being pulled in your hadoop job?  On Mon, Oct 22, 2012 at 12:32 PM...
   Author: Bryan Beaudreault, 2012-10-22, 17:13
Re: Region in Transition - HBase - [mail # user]
...In the past when I have seen regions get locked in transition it is usually a problem with the HMaster.  Seemingly a transition starts and succeeds between region servers, but the HMast...
   Author: Bryan Beaudreault, 2012-10-15, 14:51
Re: more regionservers does not improve performance - HBase - [mail # user]
...I recommend turning on debug logging on your region servers.  You may need to tune down certain packages back to info, because there are a few spammy ones, but overall it helps.  Y...
   Author: Bryan Beaudreault, 2012-10-12, 19:46
Re: Force the number of map tasks in MR? - HBase - [mail # user]
...JM,  Are you trying to use HTableInputFormat to scan HBase from map reduce?  If so, there is a map task per region so you should have 25 regions.  If only 2 are running at onc...
   Author: Bryan Beaudreault, 2012-10-12, 01:10
Re: multitable query - HBase - [mail # user]
...Use 3 jobs: 1 to scan each table. The third could do a map-side join. Make s ure to use the same sort and partitions on the first two.  Sent from iPhone.  On Aug 10, 2012, at 9:41 ...
   Author: Bryan Beaudreault, 2012-08-10, 13:50
Re: consistency, availability and partition pattern of HBase - HBase - [mail # user]
...Actual data backing hbase is replicated, but that is handled by HDFS.  Yes, if you lose an hdfs datanode, clients (in this case the client is hbase) move to the next node in the pipelin...
   Author: Bryan Beaudreault, 2012-08-09, 03:09
Re: HBase won't run on OSX 10.8 - HBase - [mail # user]
...Did this fix end up working?  I'm hesitant to upgrade to 10.8 if I'm going to run into this issue.  I'm running the CDH3 jars locally to mirror my production cluster.  On Tue,...
   Author: Bryan Beaudreault, 2012-08-08, 19:47
Re: Presplitting regions + Bulk import data into table - HBase - [mail # user]
...Change the output of your job (or whatever you are using to seed this reducer -- mapper, whatever), to output ImmutableBytesWritable as the key.  Then wrap your bytes in the writable. &...
   Author: Bryan Beaudreault, 2012-07-25, 01:55
Smart Managed Major Compactions - HBase - [mail # user]
...Hello all,   Before I start, I'm running cdh3u2, so 0.90.4.  I am looking into managing major compactions ourselves, but there doesn't appear to be any mechanisms I can hook in to ...
   Author: Bryan Beaudreault, 2012-07-18, 17:26
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