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Re: Planning the first 0.94.12 RC next week... - HBase - [mail # dev]
...Just committed the last 0.94.12 issue... Would like to cut the RC soon.    From: Jean-Marc Spaggiari  To: dev ; lars hofhansl  Cc:  Sent: Friday, September 6, 2013 1...
   Author: lars hofhansl, 2013-09-10, 22:19
Re: java.lang.NegativeArraySizeException: -1 in hbase - HBase - [mail # user]
...The 0.94.5 change (presumably HBASE-3996) is only forward compatible. M/R is a bit special in the jars are shipped with the job.  Here's a comment from Todd Lipcon on that issue: "The j...
   Author: lars hofhansl, 2013-09-09, 17:54
Re: "Column family prefix used twice" (was Re: Build failed in Jenkins: HBase-0.94 #443) - HBase - [mail # dev]
...And thanks for tracking it down, Andy!     ________________________________  From: Andrew Purtell  To: "[EMAIL PROTECTED]" ; Lars Hofhansl   Cc: [EMAIL PROTECTED] &n...
   Author: lars hofhansl, 2013-09-09, 04:50
Re: what's different between numberOfStores and numberOfStorefiles in region status variables - HBase - [mail # user]
...Each column family is a "store" (in fact there is one store per region and column families). Each region may have more than one actual HFile per store. A new HFile (storefile) is create for ...
   Author: lars hofhansl, 2013-09-06, 05:46
Rolling restart from 0.92 to 0.94 - HBase - [mail # dev]
...Shrijeet Paliwal just pointed me to this section in the HBase bookhttp://hbase.apache.org/upgrading.html#upgrade0.94 (thanks Shrijeet):   1.3.¬†Upgrading from 0.92.x to 0.94.x We used to...
   Author: lars hofhansl, 2013-09-04, 21:00
Re: HBase - stable versions - HBase - [mail # user]
...I should also explicitly state that we (Salesforce) will stay with 0.94 for the foreseeable future.  We will continue backport fixes that we need. If those are not acceptable or accepte...
   Author: lars hofhansl, 2013-09-04, 16:53
Re: (HBASE-5261)HBase 0.94 cerification for JDK7 - HBase - [mail # user]
...We (Salesforce) are using HBase with JDK7. No issues seen so far.  0.94 is not "officially certified" to work on JDK7 (we have no JDK7 jenkins, etc).  It might be good to setup a J...
   Author: lars hofhansl, 2013-09-04, 00:35
Re: experiencing high latency for few reads in HBase - HBase - [mail # user]
...A 1s SLA is tough in HBase (or any large memory JVM application).   Maybe, if you presplit your table, play with JDK7 and the G1 collector, but nobody here will vouch for such an SLA in...
   Author: lars hofhansl, 2013-08-29, 04:29
Re: RowLocks - HBase - [mail # user]
...Specifically the API has been removed because it had never actually worked correctly.   Rowlocks are used by RegionServers for intra-region operations. As such they are ephemeral, in-me...
   Author: lars hofhansl, 2013-08-29, 04:22
Re: one column family but lots of tables - HBase - [mail # user]
...You can think of it this way: Every region and column family is a "store" in HBase. Each store has a memstore and its own set of HFiles in HDFS. The more stores you have, the more there is t...
   Author: lars hofhansl, 2013-08-23, 05:35
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