[NFS-Ganesha-Devel] Re: Scalability issue with VFS FSAL and large amounts of read i/o in flight
-----Original Message-----
Locally I've experimented with two approaches to address this.
In one, we hash xprts to queues rather than using ifindex. This is similar in
concept to Malahal's old patch incrementing ifindex (which I was unaware of
until now) but has the additional benefit of ensuring that traffic for any given
xprt always lands on the same queue.
Malahal, I re-read your patch and realize now that you rotated ifindex at creation time so
it has the same behavior as my hash in terms of xprt-to-queue affinity. I originally
thought you were rotating through queues at enqueue time. So I think these approaches are
equivalent. I was just using 'fd & IOQ_IF_MASK' as a cheap hash so I think
your approach is better in the N-clients-to-M-queues space. But I'm interested in
feedback on the queue-per-xprt approach as that one is giving me the scalability and
reliability I really need with zero client interference.
--Adam