[Beowulf] Software Raid

Sean Dilda agrajag at dragaera.net
Tue Dec 13 16:27:08 EST 2005


Paul wrote:
> I read in a post somewhere that it was not possible to use a Linux 
> software RAID configuration for shared file storage in a cluster. 

I think that depends on what exactly you mean by cluster.  Some HW RAID 
cards support a 'clustered' mode that is different from what we think of 
as a beowulf cluster.  Their version of 'cluster' is two raid cards 
attached to the same set of disks.  If one raid card/machine goes away, 
the other can take over.  This is not something software raid for linux 
supports.

Now, if you're talking about a software raid filesystem, and sharing out 
to a cluster using nfs/samba/etc, then it works fine.
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