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Region spiting, compaction and merging - HBase - [mail # user]
... to run manually major compaction to get rid of invalidated data (from around 500MB to 0MB and few in memStore according to UI). As far as can see in the logs there were no major compactions since...
... compaction at some particular period - i.e 5 a.m, so it doesn't generate unnecessary load during hot periods like in the evening where there is a strong demand for performance? Or maybe I am...
   Author: Michał Podsiadłowski, 2010-03-31, 10:28
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
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
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
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
is there anyway to turn off compaction in hbase - HBase - [mail # user]
...I am using hbase 0.92.1 and want to disable compaction (both major and minor compactions) for a period of time. is that configurable in hbase? ...
   Author: Richard Tang, 2012-08-09, 10:43
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
What is HBase compaction-queue-size at all? - HBase - [mail # user]
...Any one knows what compaction queue size is meant?  By doc's definition:  *9.2.5.* hbase.regionserver.compactionQueueSize Size of the compaction queue. This is the number of stores...
... in the region that have been targeted for compaction.      - Is it the *number of Store* of regionserver need to be major compacted    ? or numbers of which is* being* compacted currently ?  I have...
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   Author: 林煒清, 2013-12-02, 06:00
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
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
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