(no subject)

[jgrafton]

Let it be known: having an openafs cache on ext3 is a bad idea. Especially when you combine it with software suspend 2. I'm wondering if any of my filesystem will be salvagable after this... sigh. Sucks. A lot.

e2fsck has been running for a while now... just waiting for it to say

"Your filesystem is fucked. Clear<y>?"

I really should be working on 212, too, but (clearly) not in the right mood at the moment.

(I suppose Windows will still work, hopefully, but still. Bah.)

Comments

[mr-wright.livejournal.com]

Doesn't the openafs cache just consist of regular files, as far as the filesystem is concerned? I'm kind of confused about why that would be a bad combination.

[experiment6.livejournal.com]

Presumably kernel swsusp + openafs + ext3 caused some sort of confusion, although I'm curious myself as to what happened and why ext3 was a problem?

[jgrafton]

AFS and journaling filesystems are generally not just a good mix, apparently. I believe it's cause openafs mucks with the filesystem in slightly un-kosher ways that make the journal not so happy.

[(Anonymous)]

ext3 is supposed to work, however. And it's only one of like three filesystems that do work, it seems like it should. All syslab machines have been running AFS cache out of ext3 since you implemented it. You sure it was ext3?

-Deason

[jgrafton]

ext3 is "supposed" to work, and the bugs between it and openafs are "supposed" to have been worked out.

That said, it's still known among openafs devs/people who use it extensively (I've talked to a few) that it's still a really bad idea to run your cache on a journaled filesystem, and I'm not the first person in the past few weeks to lose a system to afs mucking with things.

Your best bet is to either a) create an ext2 partition for afs's cache or b) create a loopback device on the local fs.

You may not have been burned yet, but you probably also haven't had a "bad situation" where the machine crashed (or just weird hacky things like hibernation). Just a warning so that you don't get burned in the future...