[Linux-cluster] GFS Volume Over NFS

[brem belguebli]

Hi,

The last sentence seems to mean that Gigi wants to create a GFS on top
of a NFS FS.

This GFS will be then exported thru NFS .

Gigi, is that wjat you want to do ?

PS: how is it going Rafael ?

2009/9/27 Rafael Micó Miranda <rmicmirregs at gmail.com>:
> Hi Gigi,
>
> El vie, 25-09-2009 a las 19:09 -0500, Mathew, Gigi (JSC-EG)[Jacobs
> Technology] escribió:
>> Hi:
>>
>>
>>
>> I am configuring a Dell EqualLogic iSCSI array in a RHEL 5.3 platform
>> with two GFS2 volumes with RedHat Cluster Suite using DRAC (primary)
>> and APC (secondary) fencing devices.  In my cluster configuration I
>> have DELL Servers (PE R900, PE6800, PE2800, PE1950) Blades (PE M1000,
>> PE1955, PE1855).  Now I have few workstations (Precision 7500,
>> Precision 5500,  Precision 690) which I would like to share the above
>> GFS2 volume over NFS (why?  They are not in the same location and
>> currently I use NIS/YPBIND/AUTOFS).  Why should I share it? (Because I
>> have user home directories on this GFS2 volume, which has to seen from
>> these workstations as they login).  What are the options I have? How
>> do I achieve it?  I had seen how to share an NFS over GFS, but NOT the
>> other way. Any suggestion will be greatly appreciated.
>>
>>
>>
>> Thanks
>>
>>
>>
>> Gigi Mathew
>>
>>
>> --
>> Linux-cluster mailing list
>> Linux-cluster at redhat.com
>> https://www.redhat.com/mailman/listinfo/linux-cluster
>
> Maybe i'm understanding you wrong, let me explain what i have understood
> from your explanation:
>
> 1.- You have several servers sharing iSCSI volumes from an iSCSI array.
>
> 2.- This servers use GFS2 as filesystem on this volumes to share,
> between themselves, the information in them
>
> 3.- You want to make other computers, workstations, get access to this
> info. They are not in the same location/network so they can not access
> the iSCSI array by themselves.
>
> 4.- You plan to share the iSCSI volumes from the array through a NFS
> export via the servers which already have access to them, so
> workstations will get access to the information via NFS.
>
> Is this right?
>
> If so, you should have a look at this document:
>
> http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Configuration_Example_-_NFS_Over_GFS/index.html
>
> NFS over GFS2 is, in my opinion, exactly what you need.
>
> The other option i think you are thinking about, GFS2 over NFS, cant be
> done.
> GFS is a filesystem you use over a device or partition. NFS is a file
> sharing protocol you use to export an already existing filesystem (EXT2,
> EXT3, XFS or GFS itself). When you mount a NFS volume you don't have
> access to a device, so you cant use GFS on it when already mounted.
>
> You maybe are thinking in GFS2 over GNDB (global network block device)
> or GFS2 over DRBD (distributed redundant block device), but i think
> previous suggestion is simpler than this one. You can also have a look
> to this approach here:
>
> http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.4/html/Global_Network_Block_Device/index.html
>
> I hope this helps.
>
> Cheers,
>
> Rafael
>
>
> --
> Rafael Micó Miranda
>
> --
> Linux-cluster mailing list
> Linux-cluster at redhat.com
> https://www.redhat.com/mailman/listinfo/linux-cluster
>