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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
[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
[HBASE-4667] Importer for exported tables - HBase - [issue]
...Once HBase tables are backed up to a well known location, we need to be able to import them. A few flavors need to be supported here:1. Running cluster or a cluster that is not up and runnin...
http://issues.apache.org/jira/browse/HBASE-4667    Author: Karthik Ranganathan, 2012-05-31, 18:10
[HBASE-4663] MR based copier for copying HFiles - HBase - [issue]
...This copier is a modification of the distcp tool in HDFS. It does the following:1. List out all the regions in the HBase cluster for the required table2. Write the above out to a file3. Each...
http://issues.apache.org/jira/browse/HBASE-4663    Author: Karthik Ranganathan, 2012-05-23, 15:51
[HBASE-4661] Ability to export the list of files for a some or all column families for a given region - HBase - [issue]
...Should be able to query the regionservers to figure out the list of files in one/some/all column families for a given regions to determine which files to copy for a backup....
http://issues.apache.org/jira/browse/HBASE-4661    Author: Karthik Ranganathan, 2012-03-02, 06:15
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB