From: Bryan Green <[EMAIL PROTECTED]>
Date: Fri, 08 Dec 2006 09:15:54 -0800
"John R. Dunning" writes:
> From: Bryan Green <[EMAIL PROTECTED]>
>
> I was able to patch the kernel, but the server was somewhat unstable.
>
> Do you remember how it was unstable? That's the kind of thing I'd very
much
> like to understand, as we're proposing to depend heavily on it. If there
are
> issues, whether specifically tied to our patches or not, I'd love to know
> about them.
I remember the system was stable until we tried to shut it down.
Ah. I have observed lustre to get cranky when you try to boot the system out
from under it. In particular, if you go to all the servers and /sbin/shutdown
without first shutting down lustre, I've seen it hang. Given the nature of
lustre, that didn't surprise me a lot :-} The times I've shut down lustre in
the correct order (shut down clients, then oss's, then mds, then mgs) it's
always behaved itself.
It would
lock up while
shutting down, possibly while unmounting filesystems. I also did not get
to do extensive
testing of the system, so I don't know if it would have been stable under
real use of the
Lustre filesystem.
Ok. Like I said, I've found a few bugs, but I've never seen it act unstable
in real use.
> I also tried to make a custom kernel for
> lustre 1.4, but ultimately hit too many roadblocks. I did learn a
bit about how
> to use 'quilt' though.
>
> Hmmm. Maybe not. Our stuff ditches quilt.
I just used quilt when working with 1.4. I did not have an ebuild for that.
I could never get quilt to work so just ditched it. You don't need it anyhow,
if you ./configure blah-blah --disable-quilt, it works fine. I imagine if you
were doing core development on lustre, in particular trying to actually build
the large collection of patches they ship with it, quilt would be handy, but
for just trying to get the kernel patched, my scripts skip it.
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