Hi,

I am planning to add a file system called CDMI under org.apache.hadoop.fs in Hadoop, something similar to KFS or S3 which are already there under org.apache.hadoop.fs. I wanted to ask that say, I write my file system for CDMI and add the package under fs but then how do I tell the core-site.xml or other configuration files to use CDMI file system. Where all do I need to make changes to enable CDMI file system become a part of Hadoop ?

Thanks a lot in advance.

Regards,
Nikhil

Hi  Agarwal,
   This repository and the corresponding README file may give you some hint
for the configuration.

   https://github.com/gluster/hadoop-glusterfs

yours,
Kun Ling

On Thu, Feb 21, 2013 at 8:53 PM, Harsh J <[EMAIL PROTECTED]> wrote:

> What Hemanth points to (fs.TYPE.impl, i.e. fs.cdmi.impl being set to
> the classname of the custom FS impl.) is correct for the 1.x releases.
> In 2.x and ahead, the class for a URI is auto-discovered from the
> classpath (a 'service'). So as long as your jar is present on the
> user's runtime, the FS class implementing cdmi:// will get loaded and
> work without requiring a config injection globally like 1.x did.
>
> On Thu, Feb 21, 2013 at 6:19 PM, Hemanth Yamijala
> <[EMAIL PROTECTED]> wrote:
> > I may be guessing here a bit. Basically a filesystem is identified by the
> > protocol part of the URI of a file - so a file on the S3 filesystem will
> > have a URI like s3://... If you look at the core-default.xml file in
> Hadoop
> > source, you will see configuration keys like fs.<fs-type>.impl and the
> value
> > is a class that implements that type of filesystem. So, you'd basically
> have
> > to define a cdmi:// type protocol and define a fs.cdmi.impl key in your
> > Hadoop configuration.
> >
> > Thanks
> > hemanth
> >
> >
> > On Thu, Feb 21, 2013 at 4:18 PM, Agarwal, Nikhil <
> [EMAIL PROTECTED]>
> > wrote:
> >>
> >> Hi,
> >>
> >>
> >>
> >> I am planning to add a file system called CDMI under
> org.apache.hadoop.fs
> >> in Hadoop, something similar to KFS or S3 which are already there under
> >> org.apache.hadoop.fs. I wanted to ask that say, I write my file system
> for
> >> CDMI and add the package under fs but then how do I tell the
> core-site.xml
> >> or other configuration files to use CDMI file system. Where all do I
> need to
> >> make changes to enable CDMI file system become a part of Hadoop ?
> >>
> >>
> >>
> >> Thanks a lot in advance.
> >>
> >>
> >>
> >> Regards,
> >>
> >> Nikhil
> >
> >
>
>
>
> --
> Harsh J
>

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