[Ocfs2-users] OCFS2 Crash With Multiple Virtual CPUs

[Carlos A. Pedreros Lizama]

Hi,

in some cases, apache could crash a OCFS2 cluster, because a miss defined
reading or write privilege to a file or folder and provoke a dead-lock in
the cluster.

On Fri, Sep 1, 2017 at 4:23 AM, Adi Kriegisch <adi at cg.tuwien.ac.at> wrote:

> Hi!
>
> > We were experimenting with the newer version of OCFS2 on Debian 9
> > Stretch inside KVM GUESTS.
> [...]
> > We have 3 nodes, but it is the same with 1 single node when we do apache
> > benchmark on the vm it crashes (becomes unpingable, unreachable, kernel
> > crashlog on virtual console) until destroy and restart. Some point of
> > the crashdump referred to SMP so we have tried to reconfigure the VM
> > with 1 cpu and guess what it worked. No crash in case of 1 cpu but the
> > performance is way too slow. Anybody has a clue what can go wrong here?
> We do see a similar behavior on a file server under load (our favorite is
> extracting a zip file containing a huge amount of small files).
>
> Do you also use the built-in cluster stack? Did you consider testing with
> an
> external cluster stack? I'd be very much interested if that makes a
> difference...
>
> best regards,
>         Adi Kriegisch
>
>
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