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[HBASE-11444] Remove use of reflection for User#getShortName - HBase - [issue]
...The time we spend looking up a user's short name with User#getShortName in hot security code paths is mostly spent in Class#getMethod, ~70%. This is only ~1% of overall CPU time but is the b...
http://issues.apache.org/jira/browse/HBASE-11444    Author: Andrew Purtell, 2014-07-21, 18:12
Re: ANNOUNCE: Tephra for HBase transactions - HBase - [mail # dev]
...Awesome!Please consider adding a pointer to Tephra to the HBase wiki's supportingprojects page: http://wiki.apache.org/hadoop/SupportingProjectsOn Sat, Jul 19, 2014 at 12:46 AM, Gary Helmlin...
   Author: Andrew Purtell, 2014-07-21, 15:16
Re: Cluster sizing guidelines - HBase - [mail # user]
...The i2.8xlarge and hs1.8xlarge EC2 instance types would provide opportunity for testing what really happens today when you attempt a high density storage architecture with HDFS and HBase. Th...
   Author: Andrew Purtell, 2014-07-19, 16:53
[HBASE-2420] [DAC] HDFS and ZK access delegation (isolation) - HBase - [issue]
...HBase security will be in part layered on top of HDFS security, and whatever ZK offers as well. For sake of discussion we presume both HDFS and ZK use a Kerberos based authentication and aut...
http://issues.apache.org/jira/browse/HBASE-2420    Author: Andrew Purtell, 2014-07-19, 01:47
[HBASE-1015] HBase Native Client Library - HBase - [issue]
...If via HBASE-794 first class support for talking via Thrift directly to HMaster and HRS is available, then pure C and C++ client libraries are possible. The C client library would wrap a Thr...
http://issues.apache.org/jira/browse/HBASE-1015    Author: Andrew Purtell, 2014-07-19, 01:18
[HBASE-10191] Move large arena storage off heap - HBase - [issue]
...Even with the improved G1 GC in Java 7, Java processes that want to address large regions of memory while also providing low high-percentile latencies continue to be challenged. Fundamentall...
http://issues.apache.org/jira/browse/HBASE-10191    Author: Andrew Purtell, 2014-07-19, 01:01
[HBASE-11534] Remove broken JAVA_HOME autodetection in hbase-config.sh - HBase - [issue]
...Allen Wittenauer mentioned on Twitter that the old JAVA_HOME autodetection script we have in hbase-config.sh is very unlikely to do the right thing now. Rip it out....
http://issues.apache.org/jira/browse/HBASE-11534    Author: Andrew Purtell, 2014-07-18, 23:50
Re: Comparing the performance of 0.98.4 RC0 and 0.98.0 using YCSB - 23% perf regression in workload E - HBase - [mail # dev]
...Workload E tests on a new testbed instance with careful attention toconfiguration do not produce the same results. We have instead:*​Workload E*  - 0.98.4RC0[OVERALL] RunTime(ms)1270229...
   Author: Andrew Purtell, 2014-07-18, 21:08
[HBASE-2601] full system application test scenarios - HBase - [issue]
...While the coverage of the unit test suite can certainly be improved, we would benefit greatly for having a suite of full system tests that mimic common applications which can be run periodic...
http://issues.apache.org/jira/browse/HBASE-2601    Author: Andrew Purtell, 2014-07-17, 04:50
[HBASE-11482] Optimize HBase TableInput/OutputFormats for exposing tables and snapshots as Spark RDDs - HBase - [issue]
...A core concept of Apache Spark is the resilient distributed dataset (RDD), a "fault-tolerant collection of elements that can be operated on in parallel". One can create a RDDs referencing a ...
http://issues.apache.org/jira/browse/HBASE-11482    Author: Andrew Purtell, 2014-07-16, 19:47
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