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[expand - 2 more] - Re: can read operation be performed during the execution of major compaction - HBase - [mail # user]
... this message in context: http://apache-hbase.679495.n3.nabble.com/can-read-operation-be-performed-during-the-execution-of-major-compaction-tp4065208p4065323.html Sent from the HBase User mailing list...
   Author: sahanashankar, 2014-10-24, 09:31
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
[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] - 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 - 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
[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 - 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