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[expand - 15 more] - Storing JSON in HBase value cell, which serialization format is most compact? - HBase - [mail # user]
...Hi,I'm currently saving JSON in pure String format in the value cell anddepends on HBase' block compression to reduce the overhead of JSON.I'm wondering if there's a more space efficient way...
   Author: Jianshi Huang, 2014-11-13, 05:08
[expand - 5 more] - Major Compaction in 0.90.6 - HBase - [mail # user]
...Hi guys, I have the following questions in HBASE 0.90.6  1. Does hbase use only one compaction thread to handle both major and minor compaction?  2. If hbase uses multiple compaction...
... threads, which configuration parameter defines the number of compaction threads?  3. After hbase.majorcompaction.interval from last major compaction ,if major compaction is executed on a table...
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   Author: Monish r, 2013-08-19, 09:48
[expand - 2 more] - Re: can read operation be performed during the execution of major compaction - HBase - [mail # user]
... this message in context: http://apache-hbase.679495.n3.nabble.com/can-read-operation-be-performed-during-the-execution-of-major-compaction-tp4065208p4065323.html Sent from the HBase User mailing list...
   Author: sahanashankar, 2014-10-24, 09:31
[expand - 1 more] - 【region compaction check key-bound or not】 - HBase - [mail # user]
...Hi,all  If Region process splits, it will make a reference.After executing child region makes a compaction that absorbs all the reference. And I have a question that how to make differences...
... when executes scanner. As we know that Compaction uses the scanner as well, so whether to set the startKey and endKey of child region's bound, in order to guarantee that the storefile in child...
   Author: Bing Jiang, 2013-07-10, 11:25
[expand - 2 more] - Re: how can i do compaction manually? - HBase - [mail # user]
...major_compact command can also compact selected region.  Take a look at the sample at the beginning of: ./src/main/ruby/shell/commands/major_compact.rb  Cheers  On Mon, Jul 1, 2013 at 10...
   Author: Ted Yu, 2013-07-01, 03:00
[expand - 4 more] - On source code of File Section mechanism in minor compaction - HBase - [mail # user]
...Hi, All I am asking the source code showing the file selection mechanism for minor compaction in HBase. I am aware that HBase minor compaction selects file based on size and generation time...
   Author: yun peng, 2013-04-11, 14:52
[expand - 9 more] - Re: Getting the scan type at preCompact - HBase - [mail # user]
...Asaf: I guess you're suggesting that we pass ScanType into preCompact() similar to what we pass into preCompactScannerOpen():                .preCompactScannerOpen(store, scanners...
...,                    majorCompaction ? ScanType.MAJOR_COMPACT : ScanType. MINOR_COMPACT, earliestPutTs); Mind filing a JIRA ?  Thanks  On Tue, Jan 29, 2013 at 10:21 AM, Asaf Mesika  wrote:  ...
   Author: Ted Yu, 2013-01-29, 18:33
[expand - 6 more] - Best way to compact a region after a move? - HBase - [mail # user]
...Hi,  When I'm balancing manually the regions on my cluster, and I want to make sure they are local, so I want to major_compact them each time I'm moving them.  On the balanceCluster method...
..., we are returning a list of region to move. Which mean they are not yet moved, so I can't compact them there.  Is there a place where I shoud hook to compact those regions?  So far, the only...
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   Author: Jean-Marc Spaggiari, 2012-12-30, 16:25
[expand - 4 more] - HBase client locks application during major compactions - HBase - [mail # user]
... figured out that it was caused by/happening during major compactions.  We have automated major compactions disabled and are running them manually on each table sequentially each day starting at 4...
... at the logs in HBase show that the compactions are occurring and this warning repeatedly while the compactions are occurring,  WARN org.apache.hadoop.ipc.HBaseServer: IPC Server Responder, call get...
   Author: Baugher,Bryan, 2012-12-28, 17:40
[expand - 6 more] - Re: How to know it's time for a major compaction? - HBase - [mail # user]
...Thanks confirmation, Kevin.  I logged HBASE-7340 so that user doesn't have to script for compaction.  On Wed, Dec 12, 2012 at 12:30 PM, Kevin O'dell wrote:  ...
   Author: Ted Yu, 2012-12-12, 20:36
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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