[Lustre-discuss] Lustre on mpath devices

Klaus Steden klaus.steden at thomson.net
Wed Oct 24 17:49:36 PDT 2007


Sorry, I should have made that first sentence more clear:

Does an FS label (i.e. LUSTRE-OST0001) provide the same functionality as the
consistent device name that the multipath device-mapper provides?

thanks,
Klaus

On 10/24/07 5:43 PM, "Klaus Steden" <klaus.steden at thomson.net>did etch on
stone tablets:

> 
> What about the FS label, i.e. LUSTRE-OST0001 (which is what's actually in my
> /etc/fstab, even though Lustre mounts a specific device)?
> 
> Does a multipathed setup automatically address failover, or is STONITH
> configuration still required to automatically remap devices normally served
> by downed servers?
> 
> thanks,
> Klaus
> 
> On 10/24/07 4:09 PM, "Cliff White" <Cliff.White at Sun.COM>did etch on stone
> tablets:
> 
>> Klaus Steden wrote:
>>> Does device multi-pathing have to be configured before the file system has
>>> been created?
>>> 
>> Lustre needs a consistent device name, so I would say yes.
>> 
>>> Is there any documentation I should be referring to on the Lustre side to
>>> get this set up?
>> 
>> No, as long as you give Lustre something that looks like a block device
>> it's fine. There is no special setup for multipath devices. Which is why
>> the consistent device name is important.
>> 
>> cliffw
>> 
>>> 
>>> thanks,
>>> Klaus
>>> 
>>>> On Oct 23, 2007, at 3:54 AM, Marco wrote:
>>>> 
>>>>> Hello,
>>>>> 
>>>>> I am new to this list and Lustre, please excuse me if I am asking an
>>>>> already-answered question (I searched the archives without success).
>>>>> 
>>>>> I'd like to use Lustre on a cluster where MGS/MDT and OSTs hosts can
>>>>> access some logical volumes (one for each host) exported from a SAN
>>>>> through fiber channel links, and available under /dev/mapper/mpathN.
>>>>> 
>>>>> Is this configuration possible? Are there any known issues with it?
>>>>> 
>>>>> 
>>>>> Thanks in advance
>>>>> Regards
>>>>> 
>>>>> -- 
>>>>> http://digilander.libero.it/mabozzo/
>>>>> 
>>>>> _______________________________________________
>>>>> Lustre-discuss mailing list
>>>>> Lustre-discuss at clusterfs.com
>>>>> https://mail.clusterfs.com/mailman/listinfo/lustre-discuss
>>> 
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>> 
> 
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