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Re: Integrity constraints - HBase - [mail # user]
...Hi Vamshi,  See the ConstraintProcessor coprocessor that was added for just this kind of case: http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/const raint/package-summary.html &...
   Author: Gary Helmling, 2012-04-25, 06:06
[HBASE-3614] Expose per-region request rate metrics - HBase - [issue]
...We currently export metrics on request rates for each region server, and this can help with identifying uneven load at a high level. But once you see a given server under high load, you're f...
http://issues.apache.org/jira/browse/HBASE-3614    Author: Gary Helmling, 2012-04-25, 01:50
Re: A confusion of RegionCoprocessorEnvironment.getReion() method - HBase - [mail # user]
...Each and every HRegion on a given region server will have it's own distinct instance of your configured RegionObserver class. RegionCoprocessorEnvironment.getRegion() returns a reference to ...
   Author: Gary Helmling, 2012-04-10, 16:13
Re: Thrift and coprocessors - HBase - [mail # user]
...Currently endpoint coprocessors are only callable via the java client.  Please do open a JIRA describing what you would like to see here.  If you'd like to try working up a patch, ...
   Author: Gary Helmling, 2012-03-19, 18:14
[expand - 1 more] - Re: Can master initialization be done after postStartMaster is called? - HBase - [mail # dev]
...For the specific AccessController case, I think it would still work to move initialized = true after the call to the postStartMaster() hook in finishInitialization().  But moving this w...
   Author: Gary Helmling, 2012-03-19, 18:07
[HBASE-3772] Hadoop DNS.reverseDns() doesn't canonicalize host names, leading to possible discrepancy in RS hostname vs. Master seen hostname for RS - HBase - [issue]
...I ran across this issue on a 0.20 based branch, so I'm not sure if this is still an issue for 0.90+.  However, 0.90 and current trunk do still make use of DNS.getDefaultHost(), so I wan...
http://issues.apache.org/jira/browse/HBASE-3772    Author: Gary Helmling, 2012-03-10, 23:22
Re: DISCUSS: Have hbase require at least hadoop 1.0.0 in hbase 0.96.0? - HBase - [mail # dev]
...That would probably help for internal usage of UGI in the secure RPC engine.  As Andy points out, we do already encapsulate UGI in our own org.apache.hadoop.hbase.security.User class (w...
   Author: Gary Helmling, 2012-03-07, 09:38
[expand - 1 more] - Re: HBase coprocessors blog posted - HBase - [mail # dev]
...Hi Andy,  Sure, I'd be happy to do a draft review and contribute whatever comments I can.  For the byline, thanks, I appreciate the offer to include me.  I'm fine with whateve...
   Author: Gary Helmling, 2012-02-02, 21:28
Re: rethinking zookeeper version - HBase - [mail # dev]
...As I recall, there were other API changes in zk 3.3 -> 3.4 that would make reverting a bit more complicated.  Like the change of NIOServerCnxn.Factory -> NIOServerCnxnFactory (ref...
   Author: Gary Helmling, 2012-01-27, 17:16
[expand - 1 more] - Re: No security sources in 0.92.0 release tarballs. - HBase - [mail # dev]
...Jon,  Thanks for spotting it.  I'll pick it up.  Assuming this means changes to src/assembly/all.xml...  I'll read up on the assembly plugin in.    On Thu, Jan ...
   Author: Gary Helmling, 2012-01-26, 20:30
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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