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[expand - 5 more] - Never ending major compaction? - HBase - [mail # user]
..., and there is a lot of horsepower behind it.  I asked a major_compaction few hours ago. Let's say, about 5 hours ago. and it's still compacting! But all servers activities seems to be null. CPU usage...
... is almost 0.  There is nothing on the master logs.  How can I see what's going on? Is there a way to see the compaction queue?  JM ...
   Author: Jean-Marc Spaggiari, 2013-01-01, 19:42
Re: number of store files and compaction - HBase - [mail # user]
...bq. will hbase.hstore.blockingStoreFiles still take effect? Yes. bq. does it trigger a minor compaction or major one Minor compaction, unless all store files are selected where...
... the compaction becomes major. On Fri, Feb 7, 2014 at 8:05 AM, Yu, Libo  wrote:   ...
   Author: Ted Yu, 2014-02-07, 16:57
[expand - 8 more] - Checking major compaction - HBase - [mail # user]
...Hi all,  Is there a way to check if major compaction is running or not on a table.  Thank you Kiran Sarvabhotla  ...
   Author: kiran, 2012-10-18, 06:12
[expand - 1 more] - Smart Managed Major Compactions - HBase - [mail # user]
...Hello all,   Before I start, I'm running cdh3u2, so 0.90.4.  I am looking into managing major compactions ourselves, but there doesn't appear to be any mechanisms I can hook in to determine...
... which tables need compacting.  Ideally each time my cron job runs it would compact the table with the next longest time since compaction, but I can't find a way to access this metric...
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   Author: Bryan Beaudreault, 2012-07-18, 17:26
[expand - 8 more] - Did major compaction really happen? - HBase - [mail # user]
...In order to turn off major compaction, I set MAJOR_COMPACTION_PERIOD to 0. However, I checked region server log, saw major compaction “happened"  quite often:   2013-12-17 01:44:45,085 INFO...
... org.apache.hadoop.hbase.regionserver.Store: Completed major compaction of 4 file(s) in cf1 of my_table,75,1387269666255.a6b0df058bf97f2f0efe1ed75f445a2c. into b23af74c66d8477b963750feed19ef23...
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   Author: branky, 2013-12-20, 04:49
[expand - 2 more] - Restrictions during compactions - HBase - [mail # user]
...Hello,  I'm a newbie and wondering whether or not there is any restriction during HBase minor/major compactions. I read the online document but could not find any explicit mention about...
... restrictions. What I'm mostly worrying about is whether read/write operations are blocked during compactions.  The description about 'hbase.hstore.blockingWaitTime':  The time an HRegion will block...
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   Author: Takahiko Kawasaki, 2012-05-23, 13:15
[expand - 8 more] - Schedule major compaction programmatically - HBase - [mail # user]
...I would like to schedule major compaction on a region programmatically. I found the API call below which can properly achieve my goal.  HBaseAdmin.majorCompact(String table...
...OrRegionName)  It turns out to be an asynchronous call and there seems no call back parameter that can be specified. How can I validate the compaction result (e.g., success or failure) ?  Thanks Chen ...
   Author: Chen Song, 2012-05-17, 18:11
[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 - 13 more] - Re: the occasion of the major compact? - HBase - [mail # user]
...I've had a similar question... perhaps the client promotes a compaction to "major" if:  a) the threshold for compaction is reached ( hbase.hstore.compactionThreshold ) or (and?) b...
...) the maximum number of files to process in a "minor" compaction is high enough to result in all files being processed into one ( hbase.hstore.compaction.max )   Can someone confirm if this is correct...
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   Author: Neil Yalowitz, 2012-01-26, 18:16
[expand - 3 more] - heavy writing and compaction storms - HBase - [mail # user]
...Hi all,  What strategies do HBase 0.90 users employ to deal with or avoid the so-called "compaction storm"?  I'm referring to the issue referred to in here:  http...
..., creates a level increase of Storefiles on all regions.  When a compaction threshold is reached for one region, it is usually reached for many regions... causing many, many regions to request...
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   Author: Neil Yalowitz, 2012-01-12, 17:56
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