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[expand - 5 more] - Are minor compaction and major compaction different in HBase 0.92? - HBase - [mail # user]
...Hello,  My HBase version is 0.92.0. And I find that when I use minor compaction and major compaction to compact a table, there are no differences. In the minor compaction, it will remove...
... the deleted cells and discard the exceeding data versions which should be the task of major compaction. I wonder if these two compaction can do the same work, why do we need both?  I mean the minor...
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   Author: yonghu, 2012-04-26, 06:48
[expand - 1 more] - Optimizing writes/compactions/storefiles - HBase - [mail # user]
...Hi all,  We just spent some time figuring out how to get writes to work properly  in our cluster on cdh3, and I wrote it up in a blog post. Might be of  interest to some of yo...
   Author: Oliver Meyn, 2012-07-11, 09:18
[expand - 6 more] - When does compaction actually occur? - HBase - [mail # user]
... a compaction request via the web UI, but that didn't seem to do anything.  Am I misunderstanding the data model used by HBase?  Is there anything else I can check to verify the functionality of my...
   Author: Tom Brown, 2012-06-01, 22:59
[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 - 1 more] - major compaction time constantly growing - HBase - [mail # user]
... has 2G ram     We have 4map/2reducer per machine  We write from m/r job to hbase (2 jobs a day).    1) We running major compaction manually once a day    2) We increases regions size...
... to prevent automatic split    3) We didn't use WAL (WAL is false).  We started running major compaction 3 month before on dayly basis. Major compaction execution time from the very begining was ~1...
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   Author: Oleg Ruchovets, 2011-09-21, 18:31
[expand - 3 more] - turn off size-based Major Compaction? - HBase - [mail # user]
...hi, folks, Is there a way to turn off Major Compaction, for sure? We are using 96.0, and set hbase.hregion.majorcompaction is 0. The intention was to only run major compaction manually...
.... It turns out after heavy load, major compaction still occur as shown in WebUI. After a bit search, I read this discussion: http://apache-hbase.679495.n3.nabble.com/Major-Compaction...
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   Author: Demai Ni, 2014-03-06, 18:29
[expand - 5 more] - Is there a way to increase the compaction queue size? - HBase - [mail # user]
...Hi, all, I have a hbase region server of 10 regions and find the compaction queue size is always 10 at maximum. After I finished inserting 1 billion records, there are still hundreds...
... of HFiles in each region and no further minor compaction is queuing.  My settings, hbase.hstore.blockingStoreFiles=Integer.MAX_VALUE hbase.hstore.compactionThreshold=3 hbase.hstore.max.filesize=100G...
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   Author: Sheng Chen, 2011-07-07, 05:55
[expand - 4 more] - Re: When should we trigger a major compaction? - HBase - [mail # user]
...Ramon: See http://hbase.apache.org/book.html#compaction for description on compaction file selection. Cheers On Fri, Feb 21, 2014 at 4:38 AM, yonghu  wrote:   ...
   Author: Ted Yu, 2014-02-21, 13:01
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
Closed regions during major compact - HBase - [mail # user]
... a major compact of the table after this failure, the m ajor compact failed and throws a Region XXX not online.  But, we do not see any errors unless we attempt the major compact.   Anyone have...
   Author: highpointe, 2011-06-15, 19:59
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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