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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
Re: HBase 0.92.1 - triggering major compaction - HBase - [mail # user]
...Thanks for your reply. Below I've put some answers. Although, I'm now facing other issues regarding to major and minor compaction. I've disabled major compaction and it is not triggered...
... manually, but when I'm loading data to selected region, I saw that major compaction queue is growing and it is being triggered ('Large Compaction' in logs) quite often. Moreover, I've noticed...
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   Author: kzurek, 2013-02-04, 12:02
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
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
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
Calculating the optimal number of regions (WAS -> Re: big compaction queue size) - HBase - [mail # user]
...(Branching this discussion since it's not directly relevant to the other th read)  I think if we ever come up with a formula, it needs to come with a big "your mileage may vary" sign. T...
   Author: Jean-Daniel Cryans, 2011-09-07, 18:12
Re: Bulk loading HFiles via LoadIncrementalHFiles fails at a region that is being compacted, a bug? - HBase - [mail # user]
..., the table has several column families and the bulk load touches  all (most) of them. In the logs of  the bulk load job, I could see that all  of the bulk loaded files were blocked for the compacted...
... region - by  this I mean: when the bulk load process failed with the  RegionTooBusyException, I have restarted the bulk load process  once again and saw that only the HFiles for the compacted...
   Author: Stanislav Barton, 2013-07-10, 10:02
Re: Is there any patch for this´╝čERROR org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction failed for region - HBase - [mail # user]
....hbase.regionserver.StoreFileScanner.next(StoreFileScanner .java:58) org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java:79 ) org.apache.hadoop.hbase.regionserver.MinorCompactingStoreScanner.next(Minor CompactingStoreScanner.java:96...
...) org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:833 ) org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:786 ) org.apache.hadoop.hbase.regionserver.CompactSplitThread.run(Compact...
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   Author: Ryan Rawson, 2010-12-20, 22:12
Re: Why does the default hbase.hstore.compactionThreshold is 3? - HBase - [mail # user]
...Thanks, JG     As you mentioned at HBASE-2375, if we make decision to split based on aggregate size of all StoreFiles, and compactionThreshold is 5, does it mean that we don't need to do...
... compaction forever? and please allow me to ask a silly question about compaction, why do we need the minor/major compaction in HBase? what's advantages of the minor/major compaction? speed up...
   Author: ChingShen, 2010-04-07, 15:32
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