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[HBASE-6619] Do no unregister and re-register interest ops in RPC - HBase - [issue]
...While investigating perf of HBase, Michal noticed that we could cut about 5-40% (depending on number of threads) from the total get time in the RPC on the server side if we eliminated re-reg...
http://issues.apache.org/jira/browse/HBASE-6619    Author: Karthik Ranganathan, 2012-10-04, 23:49
[HBASE-6922] HBase scanner performance improvements - HBase - [issue]
...Umbrella task for improving through in HBase scanners....
http://issues.apache.org/jira/browse/HBASE-6922    Author: Karthik Ranganathan, 2012-10-02, 19:19
[HBASE-4707] Avoid unnecessary DNS lookups for locality computation in HMaster - HBase - [issue]
...We recently hit an issue where upon each RS heartbeat we were looking up and resolving DNS name + address of the RS in the master, but needed it only for locality based assignment on startup...
http://issues.apache.org/jira/browse/HBASE-4707    Author: Karthik Ranganathan, 2012-08-28, 20:17
[HBASE-4672] Ability to expand HBase racks gracefully - HBase - [issue]
...When a HBase cell gets pretty saturated on top-of-rack bandwidth, then adding another rack of regionservers actually hurts. This is a task to be able to gracefully expand the cluster...
http://issues.apache.org/jira/browse/HBASE-4672    Author: Karthik Ranganathan, 2012-08-28, 18:46
[HBASE-4668] List HDFS enhancements to speed up backups for HBase - HBase - [issue]
...There are a host of improvements that help: HDFS fast copy Various enhancements to fast copy to speed up things File level hard links - which does ext3 hardlinks instead of copying blocks th...
http://issues.apache.org/jira/browse/HBASE-4668    Author: Karthik Ranganathan, 2012-08-28, 18:44
Re: Thrift2 interface - HBase - [mail # user]
...Hey Joe,  We have tried a few different things wrt the C++ clients and thrift. Just putting out some of out thoughts here.  First, we used the existing Thrift proxy as a separate t...
   Author: Karthik Ranganathan, 2012-08-23, 16:15
[HBASE-6578] Make HDFS block size configurable for HBase WAL - HBase - [issue]
...Right now, because sync-on-block-close is enabled, HLog causes the disk to stall out on large writes (esp when we cross block boundary).We currently use 256MB blocks. The idea is that if we ...
http://issues.apache.org/jira/browse/HBASE-6578    Author: Karthik Ranganathan, 2012-08-14, 11:35
[HBASE-6486] Enhance load test to print throughput measurements - HBase - [issue]
...Idea is to know how many MB/sec of throughput we are able to get by writing into HBase using a simple tool....
http://issues.apache.org/jira/browse/HBASE-6486    Author: Karthik Ranganathan, 2012-07-31, 23:14
[HBASE-6360] Thrift proxy does not emit runtime metrics - HBase - [issue]
...Open jconsole against a thrift proxy, and you will not find the rumtime stats that it should be exporting....
http://issues.apache.org/jira/browse/HBASE-6360    Author: Karthik Ranganathan, 2012-07-10, 00:30
[HBASE-4655] Document architecture of backups - HBase - [issue]
...Basic idea behind the backup architecture for HBase...
http://issues.apache.org/jira/browse/HBASE-4655    Author: Karthik Ranganathan, 2012-06-07, 10:29
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