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Re: How to know it's time for a major compaction? - HBase - [mail # user]
...    */   void postOpen(final ObserverContext c);  Auto-compaction logic can be triggered through the above hook.  Cheers  On Wed, Dec 12, 2012 at 12:36 PM, Ted Yu  wrote:  ...
   Author: Ted Yu, 2012-12-15, 05:53
Filtering/Collection columns during Major Compaction - HBase - [mail # user]
...Hi,  My understanding of major compaction is that it rewrites one store file and does a merge of the memstore, store files on disk and cleans out delete tombstones and puts prior to them...
... the major compaction which can be run daily too. I see, from the code that a major compaction essentially invokes a Scan over the region - so if the Scan is invoked with the appropriate filter (say...
   Author: Varun Sharma, 2012-12-10, 13:58
Minor compactions and impact of number of HFiles within a Store - HBase - [mail # user]
...Hi there,  I was about to tune major/minor compaction behavior and I'm wondering what are the exact (negative) aspects of handling lots (let say between 3 and 20) HFiles within a single...
... could it be critical ? - Do the minor compactions help reducing major compaction time ? (e.g. for a same data volume, is it faster to merge 3 files rather than 20 files ?) - Considering I have...
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   Author: Adrien Mogenet, 2012-12-08, 19:19
Re: How to check if a major_compact is done? - HBase - [mail # user]
...Hi, as I recently find out, by spinning on  getStorefiles = task.getStores() may not be a robust method to check if a compaction is done. For instance, if the interval for checking is set...
... too large and there are compaction and flushes intertwined together, then in the end,  getStorefiles() may not be equal to task.getStores() even when compaction is done.  Currently, I have...
   Author: yun peng, 2012-11-17, 01:03
Re: RegionServer crash without any errors (compaction?) - HBase - [mail # user]
...Did you look at your GC logs? Probably the compaction process is running your region server out of memory. Can you provide more details on your setup? Max heap size? Max Region HFile size...
...?   Regards, Dhaval   ________________________________  From: John  To: [EMAIL PROTECTED]  Sent: Thursday, 7 November 2013 10:51 AM Subject: RegionServer crash without any errors (compaction...
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   Author: Dhaval Shah, 2013-11-07, 15:59
Re: Tables gets Major Compacted even if they haven't changed - HBase - [mail # user]
...Thanx for the discussion guys.  @Anil, we have turned off major compaction in the settings. This is a script which is run manually to make sure all tables get major compacted ever so often...
... to increase data locality. In our case, there is some collateral damage of compacting unchanged regions.  I was planning to rework the script to compact regions and not tables by querying how many...
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   Author: Premal Shah, 2013-09-10, 18:39
Parent region data not deleted after compact - HBase - [mail # user]
... regions.In my opion, they are parent region directories that forget to clean. I'm try to do major_compact on this table now,but i don't know if this can solve the problem. Anyone can help to clear...
   Author: Eason Lee, 2012-04-05, 08:14
Re: RegionServer goes down in Compact SplitThread - HBase - [mail # user]
... will happen after a major compaction, but as per the logs, the compaction request comes after a split.  Regards, Skanda    On Thu, Aug 8, 2013 at 5:25 PM, Jean-Marc Spaggiari <[EMAIL PROTECTED]  ...
   Author: Prasad GS, 2013-08-08, 13:25
Is hbase call delete request for old hfile(storeFile) file if minor/major compaction happen for them - HBase - [mail # user]
...Is hbase call delete request for old hfile(storeFile) file if minor/major compaction happen for them and generate new hfile and store it in hdfs. for minor compaction how it will get size...
... of every hfile. lets we have 20 no. of hfiles for a CF and minor compaction wants to perform. Will it download all hfile and decide compaction have to do or not. Or it have in-memory hfile's size...
   Author: Upendra Yadav, 2014-02-25, 07:08
Can I major compact a specific column family? - HBase - [mail # user]
...Reading through the code, it seems, compaction flow is not designed to allow per column family compaction. I am not able to understand why? Please comment.  -Shrijeet ...
   Author: Shrijeet Paliwal, 2011-06-27, 22:41
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