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[expand - 1 more] - Region spiting, compaction and merging - HBase - [mail # user]
... to run manually major compaction to get rid of invalidated data (from around 500MB to 0MB and few in memStore according to UI). As far as can see in the logs there were no major compactions since...
... compaction at some particular period - i.e 5 a.m, so it doesn't generate unnecessary load during hot periods like in the evening where there is a strong demand for performance? Or maybe I am...
   Author: Michał Podsiadłowski, 2010-03-31, 10:28
[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
performance problems during bulk load because of triggered compaction? - HBase - [mail # user]
...Hi, I have lowcost hardware, 2 HDD, 10 nodes with HBase 0.98 CDH 5.2.1i have several apps that read/write to HBase using Java api.Sometimes I see that response time raises from normal 30-40 ...
   Author: Serega Sheypak, 2015-03-24, 19:37
[expand - 6 more] - Too many "Compaction Complete" messages - HBase - [mail # user]
... 2GB to 4GB, to avoid increasing the region count.  There were no reported problems or errors when I started back up, but ever since then I have had hundreds of "Compacting d in {sometable...
...}...... Compaction Complete" messages filling up my region server task status. It has been doing this with no appreciable change in pace for 5 days now.  When I look at the regionserver web UI, I see...
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   Author: Tom Brown, 2013-09-04, 02:13
[expand - 1 more] - Compaction in 0.90.3 - HBase - [mail # user]
...Hi guys,  I would like to temporarily reduce the number of changes to hfiles through minor and major compactions and splitting to a minimum. Is there a way to achieve this without having...
   Author: Matthias Hofschen, 2013-09-03, 08:30
[expand - 22 more] - flushing + compactions after config change - HBase - [mail # user]
....hregion.majorcompaction     0     Prior to this, all the settings were default values. I wanted to increase the write throughput on my system and also control when major compactions happen. In addition to that, I...
... wanted to make sure that my regions don't split quickly.  After the change in settings, I am seeing a huge storm of memstore flushing and minor compactions some of which get promoted to major...
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   Author: Viral Bajaria, 2013-06-27, 07:40
[expand - 6 more] - difference between major and minor compactions? - HBase - [mail # user]
...Hi, All  I am asking the different practices of major and minor compaction... My current understanding is that minor compaction, triggered automatically, usually run along with online query...
... serving (but in background), so that it is important to make it as lightweight as possible... to minimise downtime (pause time) of online query.  In contrast, the major compaction is invoked...
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   Author: yun peng, 2013-06-22, 12:05
[expand - 1 more] - Compaction timing and recovery from failure - HBase - [mail # user]
...Everyone,  I recently had a couple compactions, minors that were promoted to  majors, take 8 and 10 minutes each.  I eventually killed the  regionserver underneath them as I'd never seen...
... compactions last that  long before.  In looking through the logs from the regionserver that was  killed and watching one of the regions after it was moved over, I saw  that it took about 3 minutes...
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   Author: Brennon Church, 2013-03-25, 14:03
[expand - 4 more] - Does a major compact flush memstore? - HBase - [mail # user]
...It seems to me that a major_compact table command from hbase shell do not fush memstore?  When I done with major compact, still some data in memstore and will be flush out to disk when I...
   Author: Liu, Raymond, 2013-03-12, 07:34
[expand - 6 more] - Re: Non-sensical? Compaction Metrics Hbase UI - HBase - [mail # user]
...nice, just took a look at this path in my system. I see the growth but that would only apply to major_compactions where all files are picked up and compacted because minor compactions won...
...'t be trackable this way without knowing which files were selected by the compaction algorithm. is there a method for getting progress on these? On Mon, Aug 11, 2014 at 3:14 PM, Bryan Beaudreault...
   Author: Geovanie Marquez, 2014-08-11, 20:32
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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