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[expand - 1 more] - Compaction in 0.90.3 - HBase - [mail # user]
...Hi guys,  I would like to temporarily reduce the number of changes to hfiles through minor and major compactions and splitting to a minimum. Is there a way to achieve this without having...
   Author: Matthias Hofschen, 2013-09-03, 08:30
[expand - 22 more] - flushing + compactions after config change - HBase - [mail # user]
....hregion.majorcompaction     0     Prior to this, all the settings were default values. I wanted to increase the write throughput on my system and also control when major compactions happen. In addition to that, I...
... wanted to make sure that my regions don't split quickly.  After the change in settings, I am seeing a huge storm of memstore flushing and minor compactions some of which get promoted to major...
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   Author: Viral Bajaria, 2013-06-27, 07:40
[expand - 6 more] - difference between major and minor compactions? - HBase - [mail # user]
...Hi, All  I am asking the different practices of major and minor compaction... My current understanding is that minor compaction, triggered automatically, usually run along with online query...
... serving (but in background), so that it is important to make it as lightweight as possible... to minimise downtime (pause time) of online query.  In contrast, the major compaction is invoked...
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   Author: yun peng, 2013-06-22, 12:05
[expand - 3 more] - Re: how to know run major compact successfully? - HBase - [mail # user]
...finally, it become 100%. How I don't know how to reproduce it. What I have done is deleting many rows and in hbase shell executing "major_compact 'tablename'" On Thu, Jun 19, 2014 at 7...
   Author: Li Li, 2014-06-20, 01:50
[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 - 1 more] - Compaction timing and recovery from failure - HBase - [mail # user]
...Everyone,  I recently had a couple compactions, minors that were promoted to  majors, take 8 and 10 minutes each.  I eventually killed the  regionserver underneath them as I'd never seen...
... compactions last that  long before.  In looking through the logs from the regionserver that was  killed and watching one of the regions after it was moved over, I saw  that it took about 3 minutes...
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   Author: Brennon Church, 2013-03-25, 14:03
[expand - 4 more] - Does a major compact flush memstore? - HBase - [mail # user]
...It seems to me that a major_compact table command from hbase shell do not fush memstore?  When I done with major compact, still some data in memstore and will be flush out to disk when I...
   Author: Liu, Raymond, 2013-03-12, 07:34
[expand - 2 more] - Re: Region statistics created during major compaction - HBase - [mail # user]
...Interesting idea. How would the ranges of rows be determined per region ? This reminds me of stripe compaction feature which is in 0.98 See HBASE-7667 Cheers On Apr 30, 2014, at 3...
   Author: Ted Yu, 2014-04-30, 10:26
[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
why  major_compaction does more performance consumption than  minor_compaction ? - HBase - [mail # user]
...hello everyone! Differenct between them: 1、minor_compact will select best storeFiles to compact。 2、major_compact will select all storeFiles to compact and do some clean work。 Region...
...Server holds only one compactSplitThread ,and only one compact task run ! 3、The compaction task just scans all the storefiles and then merge one, so I hold the opinon that major compact only cost...
   Author: Fx_Bull, 2014-06-20, 09:11
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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