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From Amandeep Khurana <ama...@gmail.com>
Subject Re: Location of HBase's database (database' s files) on the hard disk
Date Fri, 21 Aug 2009 07:25:18 GMT
On Thu, Aug 20, 2009 at 11:46 PM, Nguyen Thi Ngoc Huong <huongngtn@gmail.com
> wrote:

> How can I configure the location of the hbase directory? I configured
> hbase-site.xml as follow:
>
> <property>
>    <name>hbase.rootdir</name>
>    <value>*file:///temp/hbase-${user.name}/hbase*</value>
>    <description>The directory shared by region servers.
>    Should be fully-qualified to include the filesystem to use.
>    E.g: hdfs://NAMENODE_SERVER:PORT/HBASE_ROOTDIR
>    </description>
>  </property>
>

Thats the trouble.. Your data is being stored in the temp.. instead store it
in your hdfs.
so the value of the above property would be something like
*hdfs://namenodeserver:port/hbase*



>
> and the log file is
> Not starting HMaster because:
> java.io.IOException: Mkdirs failed to create
> file:/temp/hbase-huongntn/hbase
> at
> org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:358)
>    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:487)
>    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:468)
>    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:375)
>    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:367)
>    at org.apache.hadoop.hbase.util.FSUtils.setVersion(FSUtils.java:141)
>    at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:210)
>    at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:156)
>    at
> org.apache.hadoop.hbase.LocalHBaseCluster.<init>(LocalHBaseCluster.java:96)
>    at
> org.apache.hadoop.hbase.LocalHBaseCluster.<init>(LocalHBaseCluster.java:78)
>    at org.apache.hadoop.hbase.master.HMaster.doMain(HMaster.java:1013)
>    at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:1057)
> 2009-08-21 13:35:24,163 ERROR org.apache.hadoop.hbase.master.HMaster: Can
> not start master
> java.io.IOException: Mkdirs failed to create
> file:/temp/hbase-huongntn/hbase
>    at
> org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:358)
>    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:487)
>    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:468)
>    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:375)
>    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:367)
>    at org.apache.hadoop.hbase.util.FSUtils.setVersion(FSUtils.java:141)
>    at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:210)
>    at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:156)
>    at
> org.apache.hadoop.hbase.LocalHBaseCluster.<init>(LocalHBaseCluster.java:96)
>    at
> org.apache.hadoop.hbase.LocalHBaseCluster.<init>(LocalHBaseCluster.java:78)
>    at org.apache.hadoop.hbase.master.HMaster.doMain(HMaster.java:1013)
>    at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:1057)
>
>
> 2009/8/21 Amandeep Khurana <amansk@gmail.com>
>
>
>
> > You configure the location of the hbase directory in the hbase-site.xml
> >
> > The data being lost could have multilple reasons. To rule out the
> > basic one - where have you pointed the hdfs to store data? If its
> > going into /tmp, you'll lose data everytime the tmp cleaner comes into
> > action.
> >
> > On 8/20/09, Nguyen Thi Ngoc Huong <huongngtn@gmail.com> wrote:
> > > Hi all,
> > > I am a beginner to HBase. I have some question with Hbase after setup
> > Hbase
> > > and Hadoop.
> > >
> > > The first, After setup Hbase and create a new database, I don't know
> > where
> > > is location of HBase's database (database' s files) on the hard disk.
> At
> > the
> > > first, I think it is on the hbase.rootdir directory, however, when I
> > delete
> > > directory hbase.rootdir, and type the command "list", all of database
> > > exist.
> > >
> > > The second, after restart computer and restart hbase, all database of
> > HBase
> > > is lost. Is it always true? Or did I configure wrong? How can i
> configure
> > > Hbase to save  database after restart computer?
> > >
> > > --
> > > Nguyễn Thị Ngọc Hương
> > >
> >
> >
> > --
> >
> >
> > Amandeep Khurana
> > Computer Science Graduate Student
> > University of California, Santa Cruz
> >
>
>
>
> --
> Nguyễn Thị Ngọc Hương
>

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