[Bro] Packet loss during log rotation

Damian Gerow damian.gerow at shopify.com
Tue Sep 23 11:46:14 PDT 2014

On Tue, Sep 23, 2014 at 2:33 PM, Seth Hall <seth at icir.org> wrote:

> > I'm trying to set up a new standalone Bro instance, but I seem to be
> experiencing regular packet loss.  The host is processing minimal traffic
> -- always <10Mbps, usually around 2Mbps -- but I've noticed that the packet
> loss almost always occurs at time of log rotation.
> Are you running in cluster mode or standalone?  If you're running in
> standalone, it's very possible that something is blocking briefly when the
> logs are rotated which could cause a small back up of packets, leading to
> loss.

Standalone, as I slowly work towards cluster mode.  Is there a single
thread handling both reading packets and disk I/O?  Even at 5Mbps, I would
have expected a single thread to be able to keep up with everything, unless
it's waiting for compression.
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