High availability ... again

Lee lee_hoffman at brown.edu
Mon Jun 28 10:46:30 EDT 2004

Has anyone used GFS with cyrus? Could one theoretically create a 
redundant, loadbalancing cluster using two boxes, GFS and a SAN?


On Jun 28, 2004, at 9:43 AM, Etienne Goyer wrote:

> Ben Carter wrote:
>> Etienne Goyer wrote:
>>> Tore Anderson word of wisdom where :
>>>>   There's a third option, which is the one I prefer the most:  
>>>> shared
>>>>  block device.
>>> Well, I did not consider that option since the SAN become a single 
>>> point-of-failure, and that is a big no-no according to the 
>>> specifications I have at the moment.
>>> If it would have been possible, it would have been my first choice 
>>> though.
>> Do you consider the SAN a SPOF even if you have multiple paths to it 
>> from each server and it has no internal SPOF?  If so, isn't your 
>> cluster or your single physical location a SPOF?
> Two location, a single path (20 Mb/s) between the two.  Thinking about 
> it, the SPOF is actually the link between the two location.  The 
> situation is pretty much toasted as there cannot be a fully redundant 
> setup.  Case closed !
> On a similar note, RedHat have apparently bought Sistina, and GPLed 
> GFS.  This is great news for HA under Linux, IMHO.  I will be testing 
> it soon.

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