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[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
[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
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