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[expand - 8 more] - RE: [HBase 0.92.1] Too many stores files to compact, compaction moving slowly - HBase - [mail # user]
...Hi Shrijeet Regarding your last question about the region growing bigger The following points could be one reason  When you said your compactions are slower and also you were trying...
... to split some very big store files, every split would have created some set of reference files. By the time as more writes are happening more store files are flushed.  In the compaction algo...
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   Author: Ramkrishna.S.Vasudevan, 2012-05-14, 04:29
[expand - 2 more] - Paid OSS task for performing manual major compactions - HBase - [mail # user]
...Mozilla recently had to turn off automatic scheduled major compactions  because if they happen during our peak load time, they cause an IO delay  that can destabilize our client...
... applications.  We need to put a replacement system in place as soon as possible that  can initiate the major compaction and ensure that it successfully  completed (See HBASE-2770). It would be nice...
   Author: Daniel Einspanjer, 2010-10-05, 18:11
[expand - 13 more] - Re: Additional disk space required for Hbase compactions.. - HBase - [mail # user]
...Thank you Jonathan for raising the Jira and attaching a patch  I was looking for more info on how major compactions and minor  compactions work and google found me this page:  http...
...://wiki.apache.org/hadoop/Hbase/HbaseArchitecture  After reading the wiki page and Google Bigtable paper, it seems to me  that there is a difference between Google 'minor compactions' andHbase  'minor compactions'.  In google, a minor compaction...
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   Author: TuX RaceR, 2010-05-18, 08:06
[expand - 9 more] - Re: How to prevent major compaction when doing bulk load provisioning? - HBase - [mail # user]
...On Fri, Mar 22, 2013 at 12:12 AM, Nicolas Seyvet  wrote:  If the compaction algo selects all the files for compaction, it gets upgraded into a major compaction because it's essentially...
   Author: Jean-Daniel Cryans, 2013-03-22, 16:32
[expand - 7 more] - Is hbase call delete request for old hfile(storeFile) file if minor/major compaction happen for them - HBase - [mail # user]
...Is hbase call delete request for old hfile(storeFile) file if minor/major compaction happen for them and generate new hfile and store it in hdfs. for minor compaction how it will get size...
... of every hfile. lets we have 20 no. of hfiles for a CF and minor compaction wants to perform. Will it download all hfile and decide compaction have to do or not. Or it have in-memory hfile's size...
   Author: Upendra Yadav, 2014-02-25, 07:08
[expand - 2 more] - HBase 0.92.1 - triggering major compaction - HBase - [mail # user]
...Hi,    I'm having following issues with triggering manually major compaction on selected regions via HBaseAdmin:  1. When I'm triggering major compaction on first region, which does...
... not contains key, it's running normally - I see message in logs ([..]Large Compaction requested ... Because: User-triggered major compaction;[...]) and after some time it's executed (info in logs...
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   Author: kzurek, 2013-01-30, 15:55
[expand - 1 more] - How to pick which region(s) to major compact? - HBase - [mail # user]
...Hi,  If you want to do major compaction on a single region at a time (to minimize the impact on the cluster), how do you pick which region to compact?  What should one look for in order...
... to get the best ROI out of major compaction - the best ratio of the negative impact and positive benefit - and is there a programmatic way to get to this information, so region selection+compaction...
   Author: Otis Gospodnetic, 2012-12-12, 20:19
[expand - 5 more] - Bulk loading (and/or major compaction) causing OOM - HBase - [mail # user]
... these in now, but every time we do our servers die with OOM.  The logs seem to show that there is always a major compaction happening when the OOM happens.  This is among other normal usage from...
... a variety of apps in our product, so the memstores, block cache, etc are all active during this time.  I was reading through the compaction code and it doesn't look like it should take up much...
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   Author: Bryan Beaudreault, 2012-12-07, 21:01
[expand - 2 more] - Issues on disabling compaction in HBase 0.94.2 - HBase - [mail # user]
...Hi, I want to disable automatic compaction in HBase. Currently I used following configurations in conf/hbase-site.xml The problem is compaction does not really be disable. As write...
... are issued into HBase, it can be observed when there is a flush to HFile, it will trigger a compaction. Do I miss anything from following xml configurables. Regards, Yun         hbase...
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   Author: yun peng, 2012-11-22, 23:50
Can't Major Compact, Compact, or Flush HBase Table - No Regions For My Table? - HBase - [mail # user]
..._INTERESTING_HGRAM                                                                                         1 row(s) in 0.0320 seconds hbase(main):008:0> major_compact 'SOME_INTERESTING_HGRAM' NativeException: java.io.IOException: java.io.IOException: java.lang.NullPointerException at org...
... to me not having any regions for my table even though I'm successfully inserting into it?  Thanks, David Swift   View this message in context: http://old.nabble.com/Can%27t-Major-Compact%2C-Compact...
   Author: David Swift, 2010-04-07, 19:12
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