Mailing-List: contact user-help@hbase.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@hbase.apache.org
Received-SPF: pass (athena.apache.org: local policy includes SPF record at
 spf.trusted-forwarder.org)
MIME-Version: 1.0
In-Reply-To: 
 <CAFWiQHZGN6UUwjYLmzc_8d+BA7xoioF04w3NVQ1uOmwoDr1Qbg@mail.gmail.com>
References: 
 <CACUUc6BUJZGA27bG8o=Lv-ermpUwVdQP9idTn7er+csheQryzw@mail.gmail.com>
 <DA8340397F7BAE41B8102757834CEB124F5C0435@EX-MBOX2.xiaomi.net>
 <CACUUc6AFQMEHihT==rPJ_Jk2Jrpo6-wEuj+2ZkdPDsRcj4=Duw@mail.gmail.com>
 <DA8340397F7BAE41B8102757834CEB124F5C06A4@EX-MBOX2.xiaomi.net>
 <CAFWiQHZGN6UUwjYLmzc_8d+BA7xoioF04w3NVQ1uOmwoDr1Qbg@mail.gmail.com>
From: Jean-Marc Spaggiari <jean-marc@spaggiari.org>
Date: Fri, 20 Dec 2013 07:52:51 -0500
Message-ID: 
 <CAPQV63UxY28TgDh9scHh0im8OXvg0z8wbEQ33RLyf000ciRFSw@mail.gmail.com>
Subject: 
 =?UTF-8?B?UmU6IOetlOWkjTog562U5aSNOiBTaG91bGQgd2Ugc2V0IHRoZSBwcm9wZXJ0eSAiaGJhcw==?=
	=?UTF-8?B?ZS5sb2NhbC5kaXIiIHRvIGEgbGlzdCBvZiBkaXJlY3RvcmllcyBvbiBkaWZmZXJlbnQgZGlza3MgdG8g?=
	=?UTF-8?B?c3ByZWFkIEkvTz8=?=
To: user <user@hbase.apache.org>
Content-Type: multipart/alternative; boundary=047d7b3a92eeb5f0bb04edf6c2b1

--047d7b3a92eeb5f0bb04edf6c2b1
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

Barath's respons is a good summary.

There almost nothing going into hbase.local.dir. It's like in your local
linux box. You don't specify more than one tmp directory. It's the same
thing here. There will not be really any benefit of adding that.


2013/12/20 Bharath Vissapragada <bharathv@cloudera.com>

> Hbase uses HDFS for data storage and region servers just use HDFS API to
> write files. So you should be looking at balancing disk IO at datanode
> level (dfs.datanode.data.dir as mentioned in other response). The path yo=
u
> mentioned (hbase.local.dir) is just used for storing temporary files or
> CP/dynamic jars etc (not data) by region server and doesn't take much spa=
ce
> / cause IO.
>
>
> On Fri, Dec 20, 2013 at 2:49 PM, =E8=B0=A2=E8=89=AF <xieliang@xiaomi.com>=
 wrote:
>
> > maybe you have a misunderstanding about "hbase.local.dir", please refer
> to
> > HBASE-6824 for why it was introduced.
> >
> > Thanks,
> > ________________________________________
> > =E5=8F=91=E4=BB=B6=E4=BA=BA: Tao Xiao [xiaotao.cs.nju@gmail.com]
> > =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2013=E5=B9=B412=E6=9C=8820=E6=97=
=A5 16:30
> > =E6=94=B6=E4=BB=B6=E4=BA=BA: user
> > =E4=B8=BB=E9=A2=98: Re: =E7=AD=94=E5=A4=8D: Should we set the property =
"hbase.local.dir" to a list of
> > directories on different disks to spread I/O?
> >
> > Since "hbase.local.dir" specifes local directory, why doesn't it specif=
y
> > multiple directories on different disks to spread I/O, just as what
> > "dfs.datanode.data.dir" does ?
> >
> >
> > 2013/12/20 =E8=B0=A2=E8=89=AF <xieliang@xiaomi.com>
> >
> > > Please take a look at "dfs.datanode.data.dir" in hdfs-site.xml.
> > > P.S. "hbase.local.dir" supports one dir only, don't specify it with a
> > > list:)
> > >
> > > Thanks,
> > > ________________________________________
> > > =E5=8F=91=E4=BB=B6=E4=BA=BA: Tao Xiao [xiaotao.cs.nju@gmail.com]
> > > =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2013=E5=B9=B412=E6=9C=8820=E6=
=97=A5 15:11
> > > =E6=94=B6=E4=BB=B6=E4=BA=BA: user
> > > =E4=B8=BB=E9=A2=98: Should we set the property "hbase.local.dir" to a=
 list of
> directories
> > > on different disks to spread I/O?
> > >
> > > Hi,
> > >
> > >     To spread I/O on multiple disks of the HBase cluster, I set the
> > > property "hbase.local.dir"  in hbase-site.xml to a comma-separated li=
st
> > of
> > > directories on different disks as follows:
> > >
> > >      <property>
> > >                 <name>hbase.local.dir</name>
> > >
> > >
> > >
> >
> <value>/storage/disk1/hbase.local.dir,/storage/disk2/hbase.local.dir,/sto=
rage/disk3/hbase.local.dir</value>
> > >       </property>
> > >
> > > is it right ?
> > >
> >
>
>
>
> --
> Bharath Vissapragada
> <http://www.cloudera.com>
>

--047d7b3a92eeb5f0bb04edf6c2b1--