[NFS-Ganesha-Devel] Re: Scalability issue with VFS FSAL and large amounts of read i/o in flight
On Tue, Sep 18, 2018 at 12:58 PM, Kropelin, Adam <kropelin(a)amazon.com> wrote:
It allows us to feed more than one tcp stream concurrently. When the tcp stream itself is
bandwidth-limited on the client side, and you're using blocking sockets, you have to
employ multiple threads. How many threads is enough is the question. 16 isn't enough
when you have a fleet of more than that number of bandwidth-limited clients.
The "old crufty" code used up to 200 threads, and that was a
configurable limit. We had hit a related stall in 2.0.
> And leaves an awful lot of threads waiting.
Yes, that's a down-side with few alternatives other than non-blocking I/O.
Indeed.
Matt
--Adam
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Matt Benjamin
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