[ANNOUNCE] hbase-0.95.1, the second in our 0.95 Development Series releases is available for download

The second release in a series of "Development" releases, hbase-0.95.1 is available for download from your favorite Apache mirror. See: http://www.apache.org/dyn/closer.cgi/hbase/ (It may take a few hours for the release to show up everywhere) About 270 issues have been closed against this 0.

measuring iops

Hi, I am using, org.apache.hadoop.hbase.PerformanceEvaluation, for performance evaluation and was wondering if there is a way to get iops for the entire test(s). Or, is there a particular test which will determine this metric for me. The goal is to see how many extra I/O operations each node deliv

Re: HBase Availability - Mean Time to Failure & Recovery Time

Read this: http://hortonworks.com/blog/introduction-to-hbase-mean-time-to-recover-mttr/ There are some jira ticket links in there that will give you more reading material on MTTR. --Suraj On Tue, Jun 11, 2013 at 2:19 AM, Pankaj Misra wrote: > Hi, > > > > We are using 0.94.6.1 version of HBase a

Re: HBase - Error while creating table

On Tue, Jun 11, 2013 at 8:09 AM, Rayappan Antoni raj < rayappan.antoni...@gmail.com> wrote: > Hi All, > > > > > I am trying to install Hbase(hbase-0.94.8) in ubuntu 12.04 enviroment. > > I followed the steps given in this pag

Re: coprocessorExec got stucked with generic type

Does your NameAndDistance class implement org.apache.hadoop.io.Writable? If so, it _should_ be serialized correctly. There was a past issue handling generic types in coprocessor endpoints, but that was fixed way back (long before 0.94.2). So, as far as I know, this should all be working, assumin

Re: HBase - Error while creating table

First, check through the jps command what processes are being run. I believe HMaster is not running. Then please let us know what are your entries in your etc/hosts file. Regards Shahab On Tue, Jun 11, 2013 at 11:09 AM, Rayappan Antoni raj < rayappan.antoni...@gmail.com> wrote: > Hi All, > > >

Re: SSD vs Spinning disks

On Mon, Jun 10, 2013 at 5:44 PM, Lucas Stanley wrote: > If I understand HBase's architecture correctly, it is only the WAL that > needs to be placed on a SSD to make writes perform better? > I'm skeptical when looking at the whole picture. Depending which version of HDFS you are using, and its c

HBase - Error while creating table

Hi All, I am trying to install Hbase(hbase-0.94.8) in ubuntu 12.04 enviroment. I followed the steps given in this page http://hbase.apache.org/book/quickstart.html I am able to start Hbase and enter into shell but when i

HBase Availability - Mean Time to Failure & Recovery Time

Hi, We are using 0.94.6.1 version of HBase and are planning for high availability testing. While the entire scheme to enable the cluster to be highly available is clear, I wanted to get some idea about HBase Service lifetime in terms of Mean-Time to Failure and Time of Recovery in cases of fa

Scanning not show the correct value of latest version

Hey Guys After I modifying a cell many times with delete action, The result of scan is not correct. I Expect the value of "Row1 cf:c2" is null because I've delete the cell(The line with blue color below). But I actually got "h"(The line with green color below). Is this a hbase bug? O

Re: HBase failure scenarios

yes, when a write is successful to the WAL on the responsible region server, in fact that means that the write was committed to 3 total DataNodes --Send from my Sony mobile. On Jun 11, 2013 8:40 AM, "Lucas Stanley" wrote: > Thanks Azuryy! > > So, when a write is successful to the WAL on the resp