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[HBASE-12748] RegionCoprocessorHost.execOperation creates too many iterator objects - HBase - [issue]
...This is typical pattern of enhanced for ... loop usage in a hot code path. For every HBase operation it instantiates iterator for coprocessor list twice....
http://issues.apache.org/jira/browse/HBASE-12748    Author: Vladimir Rodionov, 2015-03-01, 06:14
[expand - 2 more] - Re: Snapshot internals questions - HBase - [mail # dev]
...Yes, thanksfound already.-VladOn Wed, Feb 25, 2015 at 4:04 PM, Matteo Bertozzi wrote: ...
   Author: Vladimir Rodionov, 2015-02-26, 00:09
[expand - 1 more] - Re: [ANNOUNCE] Apache HBase 1.0.0 is now available for download - HBase - [mail # dev]
...Have no idea. Popular tech blogs: TC, VentureBeat, GigaOm will probablypublish it for free, but somebody needs to write it first. HBase folksshould contact them.The only resource that has pu...
   Author: Vladimir Rodionov, 2015-02-24, 21:43
Re: Running out of space (when there's no shortage) - Spark - [mail # user]
...Usually it happens in Linux when application deletes file w/o doublechecking that there are no open FDs (resource leak). In this case, Linuxholds all space allocated and does not release it ...
   Author: Vladimir Rodionov, 2015-02-24, 19:07
Re: snapshotting key ranges - HBase - [mail # dev]
...I do not think there is a need for new API.Take a look at TableSnapshotInputFormat which you can customize to to workwith key ranges.It allows M/R over snapshots.You make a snapshot of a ful...
   Author: Vladimir Rodionov, 2015-02-12, 17:49
[expand - 1 more] - Re: Which [open-souce] SQL engine atop Hadoop? - Phoenix - [mail # user]
...Or SpliceDB ( not open-source though), but it provides full TX , ANSISQL-99 support and can run TPCC/TPCH full.Disclaimer: I work for Splice Machine.-VladOn Fri, Jan 30, 2015 at 8:25 AM, Vla...
   Author: Vladimir Rodionov, 2015-01-30, 16:57
Re: Memstore customize - HBase - [mail # dev]
...CDH 5.2.1 (0.98-based) has HBASE-10648.-VladimirOn Tue, Jan 27, 2015 at 11:58 AM, Gaurav Agarwal wrote: ...
   Author: Vladimir Rodionov, 2015-01-27, 20:04
[PHOENIX-914] Native HBase timestamp support to optimize date range queries in Phoenix - Phoenix - [issue]
...For many applications one of the column of a table can be (and must be) naturally mapped to HBase timestamp. What it gives us is the optimization on StoreScanner where HFiles with timestamps...
http://issues.apache.org/jira/browse/PHOENIX-914    Author: Vladimir Rodionov, 2015-01-06, 01:16
[HBASE-12720] Make InternalScan LimitedPrivate - HBase - [issue]
...This is the request from sophisticated users Rationale: We would like the internal scan to be made available so we can see what is just in the MemStore (or in store files only)....
http://issues.apache.org/jira/browse/HBASE-12720    Author: Vladimir Rodionov, 2014-12-20, 01:01
[HBASE-12657] The Region is not being split and far exceeds the desired maximum size. - HBase - [issue]
...We are seeing this behavior when creating indexes in one of our environment.When an index is being created, most of the "requests" go into a single region.  The amount of time to create...
http://issues.apache.org/jira/browse/HBASE-12657    Author: Vladimir Rodionov, 2014-12-12, 03:14
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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