Re: [Xen-users] cluster filesystems

[Mark Petersen <mtp@xxxxxxxxxx>]

At 04:07 PM 4/11/2006, you wrote:
> eah ocfs2 is a file system, I realized the miss wording after i 
> replied my apologies.  Im thinking  yes they would have to be files, 
> which isnt ideal,  but again im looking for migration with 
> survivability in a block device (host) failing.
Which is why I think GNBD is a good solution, especially if you want 
block devices instead of a network/cluster filesystem.  I understand, 
as I'm trying to get the same thing going...  You would have 2 
servers running drbd0.8 (active-active) and GNBD multipath.  I think 
this might be the only truly fault tolerant solution that doesn't use 
a network/cluster filesystem.  You can accomplish the same thing with 
drbd0.7, but it takes more fiddling and you loose multipath.
> active active drbd would still require a cluster file system such as ocfs2
Or GNBD, which is a cluster aware way of exporting block 
devices.  Multiple dom0's can then access all of the block devices, 
allowing for live migration. 

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