Re: [Moosefs-users] Is it possible to make separate mfs-mount points on different sets of hdd drives?

[Thomas S H. <tha...@gm...>]

As far as I can tell, if you want to designate two disk locations you can,
and this is very viable, but you would just need two mfsmaster servers and
explicitly declare which one you are connecting too when you mount.
As for being able to do that from just one mfsmaster, I do not believe that
is possible

-Tom Hatch

On Tue, Dec 21, 2010 at 7:53 PM, Anh K. Huynh <ky...@vi...> wrote:

> On Tue, 21 Dec 2010 16:54:02 -0700
> Jun Cheol Park <jun...@gm...> wrote:
> > ...
> > Now let me describe what I want in detail. For example, suppose
> > that I have the following mfs-mount point using "mfsmount -H
> > 10.1.2.22  -o suid -o dev -o rw -o exec /mnt/mfs."
> >
> > # cat /etc/mfs/mfshdd.cfg
> > /home/mfs-rdvol1
> > /home/mfs-rdvol2
>
> So "/home/mfs-rdvol{1,2}/" will be used by mfsmaster/chunk server (to store
> data) and they are *transparent* to end users (to clients). You can write
> data directory to /home/mfs-rdvol{1,2}.
>
> > ...
> > However, I want to let /mnt/mfs points out only to /home/mfs-rdvol1
> > while /mnt/mfs2 uses /home/mfs-rdvol2, illustrated below as an
> > example.
> >
> > # df -h | grep mfs
> > mfs#10.1.2.22:9421     24T  399G   24T   2% /mnt/mfs
> > mfs#10.1.2.22:??         10T     1T   10T   10% /mnt/mfs2
> >
> > However, I got the following error when I tried to add a separate
> > mount point:
> >
> > # mfsmount /mnt/mfs2 -H 10.1.2.22 -S /home/mfs-rdvol2 -o suid -o dev
> > -o rw -o exec
> > mfsmaster register error: No such file or directory
>
> Because "/home/mfs-rdvol2" isn't a exported directory. If you want to mount
> "/foo/bar/" from the mfsmaster, that directory should be mentioned in
> "mfsexports.cfg".
>
> > How can I get a separate mfs-mount point (/mnt/mfs2) that sits on a
> > different set of hdd drives?
>
> I have no idea why you need that. You can remove the second disk
> (/home/mfs-rdvol2) from the current master, and install another
> mfsmaster/mfschunk servers that use "/home/mfs-rdvol2" -- but this way is
> too complex. I mean you would have two different setup of MooseFS.
>
> Regards,
>
> --
> Anh Ky Huynh at UTC+7
>
>
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