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[HBASE-4807] Use of Serializable in IPC makes an unnecessary copy - HBase - [issue]
...This code path isn't used much, but in HbaseObjectWritable, the code to serialize and deserialize Serializables makes an unnecessary copy through ByteArrayOutputStream.toByteArray. Instead w...
http://issues.apache.org/jira/browse/HBASE-4807    Author: Todd Lipcon, 2014-12-24, 20:08
[HBASE-3336] Make GC pauses more obvious to users - HBase - [issue]
...We often see users hit GC pauses, but it's not obvious to them what happened. I propose we add a "GCMonitor" thread which wakes up every few seconds and checks (a) that it slept for around t...
http://issues.apache.org/jira/browse/HBASE-3336    Author: Todd Lipcon, 2014-12-24, 19:48
[HBASE-2486] Add simple "anti-entropy" for region assignment - HBase - [issue]
...We've seen a number of bugs where a region server thinks it should not be serving a region, but the master and META think it should be. I'd like to propose a very simple way of fixing this i...
http://issues.apache.org/jira/browse/HBASE-2486    Author: Todd Lipcon, 2014-12-24, 19:40
[HBASE-2739] Master should fail to start if it cannot successfully split logs - HBase - [issue]
...In trunk, in splitLogAfterStartup(), we log the error splitting, but don't shut down. Depending on configuration, we should probably shut down here rather than continue with dataloss.In 0.20...
http://issues.apache.org/jira/browse/HBASE-2739    Author: Todd Lipcon, 2014-10-30, 14:40
[HBASE-2821] Keep young storefiles at lower replication - HBase - [issue]
...jgray and I were brainstorming some ideas about this:In a typical heavy-write scenario, many store files do not last very long. They're flushed and then within a small number of seconds a co...
http://issues.apache.org/jira/browse/HBASE-2821    Author: Todd Lipcon, 2014-08-14, 05:35
[HBASE-3250] Clean up HBaseAdmin APIs - HBase - [issue]
...Some discussion on IRC about this - HBaseAdmin is a bit of a mess currently, it has a lot of different calls. They tend to fall into these categories: Things that actually affect the data fr...
http://issues.apache.org/jira/browse/HBASE-3250    Author: Todd Lipcon, 2014-08-12, 20:11
[HBASE-2357] Coprocessors: Add read-only region replicas (slaves) for availability and fast region recovery - HBase - [issue]
...I dont plan on working on this in the short term, but the idea is to extend region ownership to have two modes. Each region has one primary region server and N slave region servers. The slav...
http://issues.apache.org/jira/browse/HBASE-2357    Author: Todd Lipcon, 2014-08-12, 20:08
[HBASE-4349] Add metrics for executor services - HBase - [issue]
...Would be nice to add some metrics for each of the executor services in the master and region server: number of items in the queue age of the oldest yet-unprocessed item (ie in the queue or c...
http://issues.apache.org/jira/browse/HBASE-4349    Author: Todd Lipcon, 2014-08-05, 21:06
[HBASE-2396] Coprocessors: Server side dynamic scripting language execution - HBase - [issue]
...There are a lot of use cases where users want to perform some simple operations on the region server. For example, a row may represent a Set and users want append/search/remove style operati...
http://issues.apache.org/jira/browse/HBASE-2396    Author: Todd Lipcon, 2014-08-05, 21:06
[HBASE-3533] Allow HBASE_LIBRARY_PATH env var to specify extra locations of native libs - HBase - [issue]
...Would be handy when you have native libs at other spots on the system (eg I often want to test hadoop-lzo changes directly out of its build dir)...
http://issues.apache.org/jira/browse/HBASE-3533    Author: Todd Lipcon, 2014-08-05, 00:59
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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