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[expand - 1 more] - ZK-related issue when updating from 0.94.6 to 0.94.8 - HBase - [mail # user]
...My RS finally started without the "strange ZK error", but regions are still not moving...  Here is the new sample from RS log : http://pastebin.com/raw.php?i=QJxs4chE  I can't see ...
   Author: Adrien Mogenet , 2013-07-13, 11:04
schema design: rows vs wide columns - HBase - [mail # user]
...Wide area :-)  I agree with Michael, perhaps the best explanation could be to explicit *WHEN* adding extra CF perfectly makes sense.   On Tue, Apr 16, 2013 at 4:35 PM, Michael Sege...
   Author: Adrien Mogenet , 2013-04-28, 15:23
HBase random read performance - HBase - [mail # user]
...Using bloom filter is almost mandatory there; You might also want to try Short Circuit Reads and be sure you get 100% data locality (major_compact your table first)   On Sat, Apr 13, 20...
   Author: Adrien Mogenet , 2013-04-13, 16:00
Regionserver goes down while endpoint execution - HBase - [mail # user]
...Sure, and it might be costly if your CP is building secondary index through `Put' to external tables/regions. Each of your RPC call will generate another RPC call. Also, take note that your ...
   Author: Adrien Mogenet , 2013-03-26, 07:42
[expand - 1 more] - Is "synchronized" required? - HBase - [mail # user]
...I probably don't know your application enough to make an accurate answer, but you could have a look at asynchbase [ https://github.com/OpenTSDB/asynchbase] if you have thread-safety issues a...
   Author: Adrien Mogenet , 2013-02-06, 07:45
Tune MapReduce over HBase to insert data - HBase - [mail # user]
...I didn't find documentation about these settings ; is it recommended to set it greater than the default value ("1") on modern servers ? Or is it an internal behavior we should not tune by ou...
   Author: Adrien Mogenet , 2013-02-04, 19:53
remove dead regions server - HBase - [mail # user]
...The easiest way is to restart your HBaseMaster. The next active master will not register the dead RS.   On Mon, Feb 4, 2013 at 1:07 PM, Samar Kumar  wrote:  > Hi Everyone, ...
   Author: Adrien Mogenet , 2013-02-04, 19:08
Coprocessor HDFS jar hot deployment - HBase - [mail # user]
...Yes of course ; CP is instantiated (and start() method is then called) when the region is starting. When disabling/enabling the table it will force all regions to be re-opened.   On Thu...
   Author: Adrien Mogenet , 2013-01-31, 20:24
Storing images in Hbase - HBase - [mail # user]
...Could HCatalog be an option ? Le 26 janv. 2013 21:56, "Jack Levin"  a écrit : > > AFAIK, namenode would not like tracking 20 billion small files :) > > -jack > > On Sa...
   Author: Adrien Mogenet , 2013-01-28, 10:01
Hbase scans taking a lot of time - HBase - [mail # user]
...Definitely not, you should keep it under 3 maximum. Keep in mind that 1 CF == 1 Store == at least that many big files to read.   On Fri, Jan 25, 2013 at 6:59 PM, Vibhav Mundra  wro...
   Author: Adrien Mogenet , 2013-01-25, 18:04