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[HBASE-3614] Expose per-region request rate metrics - HBase - [issue]
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...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...
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http://issues.apache.org/jira/browse/HBASE-3614
Author: Gary Helmling,
2012-04-25, 01:50
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Re: A confusion of RegionCoprocessorEnvironment.getReion() method - HBase - [mail # user]
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...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 ...
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Author: Gary Helmling,
2012-04-10, 16:13
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Re: Thrift and coprocessors - HBase - [mail # user]
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...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, ...
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Author: Gary Helmling,
2012-03-19, 18:14
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Re: Can master initialization be done after postStartMaster is called? - HBase - [mail # dev]
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...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...
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Author: Gary Helmling,
2012-03-19, 18:07
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Re: Can master initialization be done after postStartMaster is called? - HBase - [mail # dev]
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...Hi Ram, The MasterObserver.postStartMaster() hook was added after we ran into a case where we wanted a single initialization point as soon as the active master was up for security impl...
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Author: Gary Helmling,
2012-03-19, 17:30
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[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]
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...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...
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http://issues.apache.org/jira/browse/HBASE-3772
Author: Gary Helmling,
2012-03-10, 23:22
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Re: DISCUSS: Have hbase require at least hadoop 1.0.0 in hbase 0.96.0? - HBase - [mail # dev]
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...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...
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Author: Gary Helmling,
2012-03-07, 09:38
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Re: HBase coprocessors blog posted - HBase - [mail # dev]
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...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...
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Author: Gary Helmling,
2012-02-02, 21:28
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Re: HBase coprocessors blog posted - HBase - [mail # dev]
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...Great work, Mingjie! On Wed, Feb 1, 2012 at 7:29 AM, Jonathan Hsieh wrote: up e //blogs.apache.org/hbase/entry/coprocessor_introduction>...
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Author: Gary Helmling,
2012-02-01, 16:34
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Re: rethinking zookeeper version - HBase - [mail # dev]
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...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...
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Author: Gary Helmling,
2012-01-27, 17:16
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