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Re: Performance oddity between AWS instance sizes - HBase - [mail # user]
...What do you have HBASE_HEAPSIZE set to in hbase-env.sh?  Is itpossible that you're overcommitting memory and the instance isswapping?  Just a shot in the dark, but I see that the m...
   Author: Gary Helmling, 2014-09-18, 18:42
Re: adding new tokens to existing Hconnection instances - HBase - [mail # user]
...Authentication is only performed during RPC connection setup.  Sothere isn't really a concept of token expiration for an existing RPCconnection.  The connection will be authenticat...
   Author: Gary Helmling, 2014-09-10, 20:03
[HBASE-11292] Add an "undelete" operation - HBase - [issue]
...While column families can be configured to keep deleted cells (allowing time range queries to still retrieve those cells), deletes are still somewhat unique in that they are irreversible ope...
http://issues.apache.org/jira/browse/HBASE-11292    Author: Gary Helmling, 2014-08-28, 23:10
[ANNOUNCE] Tephra 0.2.1 release - HBase - [mail # dev]
...Hi all,I'm happy to announce the 0.2.1 release of Tephra.Tephra provides globally consistent transactions on top of ApacheHBase by leveraging HBase's native data versioning to providemulti-v...
   Author: Gary Helmling, 2014-08-28, 20:10
[HBASE-11800] Coprocessor service methods in HTableInterface should be annotated public - HBase - [issue]
...The HTableInterface.coprocessorService(...) and HTableInterface.batchCoprocessorService(...) methods were made private in HBASE-9529, when the coprocessor APIs were seen as unstable and evol...
http://issues.apache.org/jira/browse/HBASE-11800    Author: Gary Helmling, 2014-08-26, 03:14
[expand - 2 more] - Re: getting delegation token for hbase - HBase - [mail # user]
...The default expiration for HBase delegation tokens is 7 days.  But ofcourse that could be overridden for a given deployment.On Fri, Aug 15, 2014 at 1:51 PM, Parth Brahmbhatt <[EMAIL ...
   Author: Gary Helmling, 2014-08-15, 21:07
[HBASE-11653] RegionObserver coprocessor cannot override KeyValue values in prePut() - HBase - [issue]
...Due to a bug in HRegion.internalPut(), any modifications that a RegionObserver makes to a Put's family map in the prePut() hook are lost.This prevents coprocessors from modifying the values ...
http://issues.apache.org/jira/browse/HBASE-11653    Author: Gary Helmling, 2014-08-02, 04:26
ANNOUNCE: Tephra for HBase transactions - HBase - [mail # dev]
...Hi all,I would like to introduce a new open source project, Continuuity Tephra,which provides scalable, distributed transactions for Apache HBase.Tephra provides "snapshot isolation" for con...
   Author: Gary Helmling, 2014-07-19, 07:46
Re: Themis : implements cross-row/corss-table transaction on HBase. - HBase - [mail # dev]
...Hi Jianwei,You may also want to take a look at the generic client transaction APIbeing proposed in HBASE-11447:https://issues.apache.org/jira/browse/HBASE-11447I think it would be useful to ...
   Author: Gary Helmling, 2014-07-08, 17:05
[expand - 1 more] - Re: problem access security hbase - HBase - [mail # user]
...Hi Cheney,If you are obtaining kerberos credentials outside of your program (ie.kinit), then you can use k5start, which will run your program afterperforming a kinit and has a variety of opt...
   Author: Gary Helmling, 2014-07-02, 05:57
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