[Gluster-users] Deployment (round 2)

Paolo Supino paolo.supino at gmail.com
Sat Sep 20 20:16:22 UTC 2008

Hi Krishna

  I have all intentions of mounting the toaster's filesystems on the
head node using iSCSI (see my original post), but I have a problem: I
have 35 servers in the gluster filesystem that the researchers don't see
directly: the head node hides the private network with
PAT/PNAT/Masquerading (pick your favorite acronym) so the clients only
see the head node but not all the gluster filesystem servers behind it.
The glusterfs clients get a wrong image of the gluster filesystem ... I
could simply remove the PAT/PNAT/Masquerading (pick your favorite
acronym), but I'd rather not do that because that adds an overhead in
systems administration and breaks the rule of KISS.


Krishna Srinivas wrote:
> Paolo,
> You could mount toaster's partition on head node using iscsi.
> Run glusterfs server on head node exporting the two partitions.
> Run glusterfs client on the researcher's nodes.
> Krishna
> 2008/9/18 Paolo Supino <paolo.supino at gmail.com>:
>> Hi
>>   now that I have a new shiney parallel filesystem :-) I want to take
>> it a step forward (the fun never ends ;-) ) ...
>>   A few words on my HPC cluster:
>> 1. The private network between the compute nodes, head and toaster
>> (Netapp FAS 2020) is Gigabit Ethernet.
>> 2. The toaster exports 2.1 and 5.1 TB volumes served over NFSv3 (ouch..)
>> 3. Only the head node is multi homed and connected to the faculty
>> network, where the researchers are ...
>>   What I thought of doing:
>> 1. Re export the toaster using iSCSI.
>> 2. Mount the iSCSI exports on the head and add them to the gluster
>> volume. This is pretty straight forward :-) and voilà I have a uniform
>> 9.3TB volume ...
>> 3. The last part is the tricky part that I still have to figure out:
>> have the researchers be able to be gluster clients of this volume
>> without exposing the private network to the faculty network (I don't
>> want to NFS export it)
>> --
>> Paolo
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