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[HBASE-8691] High-Throughput Streaming Scan API - HBase - [issue]
...I've done some working testing various ways to refactor and optimize Scans in HBase, and have found that performance can be dramatically increased by the addition of a streaming scan API. &n...
http://issues.apache.org/jira/browse/HBASE-8691    Author: Sandy Pratt, 2013-10-24, 18:21
[expand - 6 more] - Re: Poor HBase map-reduce scan performance - HBase - [mail # user]
...That's my understanding of how the current scan API works, yes.  The client calls next() to fetch a batch.  While it's waiting for the response from the server, it blocks.  Af...
   Author: Sandy Pratt, 2013-06-05, 18:57
RE: Hmaster and HRegionServer disappearance reason to ask - HBase - [mail # user]
...This sounds similar to something I've seen before, but in that case I found  the winning GC arguments to be something like  -XX:+UseParallelGC -XX:+UseParallelOldGC -XX:MaxDirectMe...
   Author: Sandy Pratt, 2012-07-16, 22:55
RE: HBase bulk loader doing speculative execution when it set to false in mapred-site.xml - HBase - [mail # user]
...It might work to set the property as final on the server side, so that clie nts can't override it:   mapred.reduce.tasks.speculative.execution false true If true, then multiple...
   Author: Sandy Pratt, 2012-04-02, 22:26
RE: Hbase Transactional support - HBase - [mail # user]
...Maysam,  I wasn't aware of Omid before this post, so thanks for sharing that.  I rea lly like the approach and indeed our own implementation of transactions on  HBase uses MVC...
   Author: Sandy Pratt, 2012-03-19, 19:46
[expand - 1 more] - RE: gc pause killing regionserver - HBase - [mail # user]
...be nice y  [Sandy Pratt]    Fair enough.  IIRC hbase-env.sh comes with "-ea -XX:+UseConcMarkSweepGC -XX s my understanding that args like the "max GC pause" one are hints...
   Author: Sandy Pratt, 2012-03-06, 18:56
RE: HBase & BigTable + History: Can it run decently on a 512MB machine? What's the difference between the two? - HBase - [mail # user]
...I have HBase instances with 2GB heap that perform ok.  I'm sure they would  perform better with more RAM, but they are definitely good enough to test q ueries and so forth.  I...
   Author: Sandy Pratt, 2012-03-05, 21:50
[expand - 1 more] - RE: OBOB in HMerge? - HBase - [mail # dev]
...Filed one, but looks like it's already fixed on trunk.  From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Stack Sent: Thursday, February 02, 2012 9:08 PM To: [EMAIL PROTEC...
   Author: Sandy Pratt, 2012-02-03, 20:21
[expand - 3 more] - RE: RegionServer dying every two or three days - HBase - [mail # user]
...You think it's an Amazon problem maybe?  Like they paused or migrated your  virtual machine, and it just happens to be during GC, leaving us to think t he GC ran long when it didn'...
   Author: Sandy Pratt, 2012-01-05, 21:54
RE: Ubuntu pulling sun java from partner archives.. Open JDK? - HBase - [mail # user]
...I've been in production with OpenJDK on CentOS 5.7 for some months now with  no problems.  It appears to be functionally identical to Sun JDK as far as  Hadoop and HBase are c...
   Author: Sandy Pratt, 2012-01-03, 21:51
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