[Linux-cluster] EXT3 service mounted on two nodes

[Bryn M. Reeves]

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gordan at bobich.net wrote:
> On Mon, 29 Oct 2007, Bryn M. Reeves wrote:
> 
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>> gordan at bobich.net wrote:
>>> Sure, that works. The only problem is that if both nodes write to the
>>> same files at the same time (including meta data), you'll end up with a
>>> corrupted file system. But if both machines are mounting the FS
>>> read-only (in which case you might as well use ext2), then there's no
>>> problem with that.
>>
>> Are you sure about that? I've never known it do anything useful beyond
>> spectacularly breaking the file systems involved.
> 
> I can't see why it would. If the fs is mounted ro, no harm will come to
> it. Any writing, though, and you're likely to trash it faster than you
> can type mount -o ro,remount. :-)

The "are you sure about that?" was at the idea that you could have the
fs mounted writably and not run into problems unless you tried to write
to the same files (or their metadata) on the two hosts simultaneously.
Your original message seemed to imply that this would work.

Regards,
Bryn.

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