[Linux-cluster] architecture discussion -- NFS clustering with iSCSI

[Gordan Bobic]

Terry wrote:
> On Jan 27, 2008 6:12 PM, Rainer Duffner <rainer at ultra-secure.de> wrote:
>> Am 27.01.2008 um 23:02 schrieb Terry:
>>
>>>
>>> Well, I am having a heck of a time wrapping my head around how
>>> clustering and gfs are related.  My application is an N+1 type of
>>> configuration (grid computing).  I don't need any application
>>> clustering that cluster suite offers.  I just need a file system that
>>> they can all mount in read/write.
>>
>>
>> People I have talked to, who have grid-computing requirements,
>> generally avoid GFS (because of the complexity) and choose NFS.
>>
>> Do you have concurrent writes to the same file from different nodes?
>> How many nodes do you have?
>> There are products tailored for this scenario (Isilon, Panasas)....
>>
>>
>>
>> cheers,
>> Rainer
>> --
>> Rainer Duffner
>> CISSP, LPI, MCSE
>> rainer at ultra-secure.de
> 
> 
> Good questions:
> 1) Do you have concurrent writes to the same file from different nodes?
>   1a) No
> 2) How many nodes do you have?
>   2a) 3 to start, probably won't go beyond 12
> 
> I appreciate alternative ideas to NFS.  NFS could possibly introduce
> performance issues (comments here appreciated).  The majority of the
> system is write.  I would say 80%.

I suspect under that kind of a mostly-write load, NFS might actually 
outperform GFS.

Gordan