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[expand - 2 more] - Re: "compact" command cannot trigger major compaction - HBase - [mail # user]
...did you tried to use the "major_compact" command? hbase> major_compact 't1' Matteo On Fri, Feb 21, 2014 at 9:40 AM, Ramon Wang  wrote:   ...
   Author: Matteo Bertozzi, 2014-02-21, 09:44
[expand - 1 more] - Timeouts during major compaction - HBase - [mail # user]
...We are running major compaction once a week, on a 6 nodes hbase cluster. We see that we are getting timeouts in our application. We see also in JMX metrics the following: 1. compaction time...
... avg was 200 seconds instead of 3 seconds 2. ParNew collection time was twice than usual 3. Compaction queue size was high 4. Region number increased at that time 5. Disk I\O read...
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   Author: yanivG, 2014-06-17, 12:03
[expand - 1 more] - Deleted cells surviving compaction - HBase - [mail # user]
...My understanding of delete operations is that a delete essentially writes out a tombstone for the cell.  Cells aren't actually deleted until a major compaction. I performed the following...
... sequence on a single cell: 1) Put 2) Delete with a timestamp of HConstants.LATEST_TIMESTAMP 3) Major compact table 4) Put 5) Do a regular scan or get... no value returned 6) Do a raw scan, and I...
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   Author: David Larsen, 2014-03-26, 01:51
[expand - 6 more] - Re: Disabled automated compaction - table still compacting - HBase - [mail # user]
...Hi David,  Minor compactions can be promoted to Major compactions when all the files are selected for compaction. And the property below will not avoid that to occur.  Section 9.7.6.5 there...
   Author: Jean-Marc Spaggiari, 2013-07-09, 14:41
[expand - 1 more] - HBase compaction question - HBase - [mail # user]
... TTL to 33 days so total amount of data stored for that table is 33 * 40 * 24 = ~31T, assuming major compaction works properly. Another indication of this process is every our, each region...
... will have its HFile count increased by 1.     * We have automatic major compaction disabled as suggested.     * There is an hourly job A that read from HBase and it takes about 30 minutes, so we can...
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   Author: Chen Song, 2014-02-21, 16:56
Re: Disable major compaction - HBase - [mail # user]
...Moving the question to user mailing list. Hi Yaniv, Even with this setting, you might still have some major compactions if all the stores are selected for a compaction. Any specific...
   Author: Jean-Marc Spaggiari, 2014-02-12, 14:14
[expand - 4 more] - Compaction throttling and per-region compaction automation - HBase - [mail # user]
...Hi,  Major compactions are..... you know... :) So I saw there is https://issues.apache.org/jira/browse/HBASE-3743 for throttling them.  We are about to try the per-region compaction, so I...
   Author: Otis Gospodnetic, 2012-11-06, 18:38
[expand - 12 more] - GC peaks during major compaction - HBase - [mail # user]
...Hi, We are running CDH 4.5, 6 nodes with hbase cluster (0.94.6). We configured major compaction to run once a week. During this time we are getting timeouts while writing to hbase...
... (application level). When investigating it further more I have noticed that the timeout are being caused by GC "Stop the world" scenario which takes 3 minutes and not the actual Major compaction (which...
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   Author: yanivG, 2014-08-14, 16:59
[expand - 23 more] - Re: Why is this region compacting? - HBase - [mail # user]
...Can you past logs a bit before that? To see if anything triggered the compaction? Before the 1M compactions entries.  Also, what is your setup? Are you running in Standalone? Pseudo...
   Author: Jean-Marc Spaggiari, 2013-09-24, 16:13
[expand - 3 more] - Manage Major Compaction. - HBase - [mail # user]
...Hello,  The hbase book at apache website has the following statement about controlling major compaction: "A common administrative technique is to manage major compactions manually, rather...
... than letting HBase do it. By default,HConstants.MAJOR_COMPACTION_PERIOD is one day and major compactions may kick in when you least desire it - especially on a busy system. To turn off...
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   Author: Jason Huang, 2013-09-20, 20:06
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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