High availability ... again

[Ken Murchison]

Lee wrote:

> Has anyone used GFS with cyrus? 

Not GFS specifically, but Sun's QFS is being used.  I'm certain that 
SGI's CXFS would also work (although I haven't tested it).


> Could one theoretically create a 
> redundant, loadbalancing cluster using two boxes, GFS and a SAN?

Yes, see my earlier post about the 2.3 branch.


> 
> 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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