hbase-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ted Yu <yuzhih...@gmail.com>
Subject Re: Confusion with Actual Number of Regions in HBase
Date Wed, 20 Feb 2013 23:48:23 GMT
I am not familiar with monitoring tools on EC2.

You can use Ganglia to monitor hadoop / HBase.

Cheers

On Wed, Feb 20, 2013 at 3:42 PM, Joarder KAMAL <joarderm@gmail.com> wrote:

> Hi Ted,
>
> Thanks for the reply.
>
> Q1. Cleared now. Sorry I didn't count the -ROOT- and .META. tables
> Q2. Not clear. Could explain a bit more? I am using the default setting.
>
> Thanks again.
>
>
> On 21 February 2013 10:36, Ted Yu <yuzhihong@gmail.com> wrote:
>
> > bq. but when I click to view the table details it shows there are 5
> > regions.
> >
> > Did you include -ROOT- and .META. tables above ?
> >
> > bq. as you can see the maxHeapMB size is 991
> >
> > Attachment is automatically stripped from your email. FYI
> >
> > On Wed, Feb 20, 2013 at 3:26 PM, Joarder KAMAL <joarderm@gmail.com>
> wrote:
> >
> > > Dear All,
> > >
> > > I am currently running a 3 node HBase cluster with Amazon EC2 small
> > > instance (1CPU, 1.7GB Mem). After running a simple workload (type A)
> > using
> > > YCSB benchmarking tool, I noticed in the Web UI that the number of
> > regions
> > > in the 3 region servers are 7 but when I click to view the table
> details
> > it
> > > shows there are 5 regions. I am a bit confuse. Does the Web UI showing
> > > wrong results? How can I check region details from the shell/is there
> any
> > > other command line tools for that? I am using Hbase 0.94.3 (as it is
> the
> > > latest version compatible with YCSB at this moment) with Hadoop-1.0.4.
> > >
> > > Another thing, as you can see the maxHeapMB size is 991 (default
> setting)
> > > then whenever I am running workloads the server free memory status is
> > > terrible - almost 0MB for 1M/10M transactions (YCSB/Workload-A). My
> > > question is if the maxHeapMB is fixed at 1GB then why I am loosing
> extra
> > > 700MB memory? How can I monitor cpu/memory/io usage for individual
> > cluster
> > > components (HBase/Hadoop/MapRed/ZK, etc.)? Is there any tool available
> > with
> > > HBase?
> > >
> > > Thanks a lot.
> > >
> > >
> > > [image: Inline images 1]
> > >
> > >
> > > Regards,
> > > Joarder Kamal
> > >
> > > ------------------------------------------
> > > PhD Student
> > > Gippsland School of Information Technology,
> > > Faculty of Information Technology,
> > > MONASH University
> > > Churchill VIC, Australia. 3842
> > >
> > >
> >
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message