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Re: WALPlayer kills many RS when play large number of WALs - HBase - [mail # user]
...​memory.​​​​EC2 m1.xlarge or m3.xlarge ? You might find some of the new types with morememory have better price-performance value. If you are on EC2 and arecolocating mapreduce with HBase, y...
   Author: Andrew Purtell, 2014-07-22, 17:21
[HBASE-10655] ByteRange-fronted slab allocator for on- and off-heap cellblock storage - HBase - [issue]
...Our ByteRange interface has some nice properties such as a compareTo method using hbase-friendly unsigned byte comparison. This can be backed by either on-heap or off-heap byte buffers. Cons...
http://issues.apache.org/jira/browse/HBASE-10655    Author: Andrew Purtell, 2014-07-22, 16:48
[HBASE-11538] 0.98.4RC0 has a scanning related 23% perf regression - HBase - [issue]
...See thread on dev@ titled "Comparing the performance of 0.98.4 RC0 and 0.98.0 using YCSB - 23% perf regression in workload E"...
http://issues.apache.org/jira/browse/HBASE-11538    Author: Andrew Purtell, 2014-07-22, 16:37
Re: [VOTE] The 1st HBase 0.98.4 release candidate (RC0) is available, vote closing 7/21/2014 - HBase - [mail # dev]
...With 6 +1 votes and no -1 or 0 votes, the vote carries and RC0 will bereleased as 0.98.4. I'll send the release announcement out shortly. Thanksto all who tested the RC!On Mon, Jul 14, 2014 ...
   Author: Andrew Purtell, 2014-07-22, 15:31
[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
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