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[HBASE-3150] Allow some column to not write WALs - HBase - [issue]
...We have this unique requirement where some column families hold data that is indexed from other existing column families. The index data is very large, and we end up writing these inserts in...
http://issues.apache.org/jira/browse/HBASE-3150    Author: Karthik Ranganathan, 2014-06-08, 23:04
[HBASE-4666] List the steps required to enable HBase backups - HBase - [issue]
http://issues.apache.org/jira/browse/HBASE-4666    Author: Karthik Ranganathan, 2014-05-29, 02:53
[HBASE-4665] Ability to verify backed up data - HBase - [issue]
...Need a generic way to verify a small percent (sample based) of the data that was backed up from HBase....
http://issues.apache.org/jira/browse/HBASE-4665    Author: Karthik Ranganathan, 2014-05-29, 02:53
[HBASE-4664] Add the various scripts to take HBase backups - HBase - [issue]
...import and export scripts are the basics. The other levels of backups (intra-datacenter on a separate cluster and cross datacenter) are built over these....
http://issues.apache.org/jira/browse/HBASE-4664    Author: Karthik Ranganathan, 2014-05-29, 02:53
[HBASE-5509] MR based copier for copying HFiles (trunk version) - 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-5509    Author: Karthik Ranganathan, 2014-03-14, 00:56
[HBASE-6925] Change socket write size from 8K to 64K for HBaseServer - HBase - [issue]
...Creating a JIRA for this, but the change is trivial: change NIO_BUFFER_LIMIT from 8K to 64K in HBaseServer. This seems to increase scan throughput....
http://issues.apache.org/jira/browse/HBASE-6925    Author: Karthik Ranganathan, 2013-09-18, 22:21
[HBASE-5355] Compressed RPC's for HBase - HBase - [issue]
...Some application need ability to do large batched writes and reads from a remote MR cluster. These eventually get bottlenecked on the network. These results are also pretty compressible some...
http://issues.apache.org/jira/browse/HBASE-5355    Author: Karthik Ranganathan, 2013-06-05, 00:27
[HBASE-6874] Implement prefetching for scanners - HBase - [issue]
...I did some quick experiments by scanning data that should be completely in memory and found that adding pre-fetching increases the throughput by about 50% from 26MB/s to 39MB/s.The idea is t...
http://issues.apache.org/jira/browse/HBASE-6874    Author: Karthik Ranganathan, 2013-05-25, 08:07
[HBASE-7477] Remove Proxy instance from HBase RPC - HBase - [issue]
...Currently, we use HBaseRPC.getProxy() to get an Invoker object to serialize the RPC parameters. This is pretty inefficient as it uses reflection to lookup the current method name.The aim is ...
http://issues.apache.org/jira/browse/HBASE-7477    Author: Karthik Ranganathan, 2013-04-30, 23:32
[HBASE-6770] Allow scanner setCaching to specify size instead of number of rows - HBase - [issue]
...Currently, we have the following api's to customize the behavior of scans:setCaching() - how many rows to cache on client to speed up scanssetBatch() - max columns per row to return per row ...
http://issues.apache.org/jira/browse/HBASE-6770    Author: Karthik Ranganathan, 2013-04-25, 19:04
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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