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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 - 4 more] - 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
[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 - 3 more] - how to know run major compact successfully? - HBase - [mail # user]
...I have deleted many rows in a table. as far as I know, only after major compaction, they are really deleted. So I run major compact 'tablename' in hbase shell it returns very fast...
.... is the real compact operation running in background? how do I know it's done?   ...
   Author: Li Li, 2014-06-18, 03:19
[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 - 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
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
[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 - 4 more] - Compactions in busy system(s) - HBase - [mail # user]
...  Hi all,  I'm not sure if I've understood well the purpose of major compaction and  how to handle it in a busy system. It is important to run major compaction when we have a lot of deleted...
...  data, as it removes the "marked as deleted" flags. There are also the "flush" and "minor compaction" operations associated  with the writing on disk. I understand that in minor compaction many...
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   Author: Iulia Zidaru, 2011-04-05, 10:45
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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