[Linux-cluster] gfs for exsisting disks

[Bryn M. Reeves]

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On 11/14/2012 02:54 PM, getridofthespam wrote:
> /dev/mapper/mpathcp1 on /3parslice1 type ext4 (rw) 
> /dev/mapper/mpathbp1 on /3parslice2 type ext4 (rw)
> 
> The slices are ext4 formatted.
> 
> Now I want to add a second server that needs to access the same
> disk slices.
> 
> Is gfs the solution? Can I keep the data on the disks? Any
> procedure to follow available?

GFS (or better GFS2..) would be one solution but you cannot "convert"
from an ext type file system; you would need to backup and restore to
a newly-created GFS2 volume.

You could also consider using a network file system exported from one
host or an external filer as an alternative to sharing the data
between two hosts.

It's difficult to tell whether a cluster file system like GFS2 is "the
solution" without knowing what application will use it and how the app
is structured; this is key to determining how a clustered file system
will perform and is an important factor in deciding which is the best
option for a given case.

Regards,
Bryn.

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