[IPython-User] ipcluster: Too many open files (tcp_listener.cpp:213)
Tue Jun 19 02:50:35 CDT 2012
On Tue, Jun 19, 2012 at 12:42 AM, Fernando Perez <firstname.lastname@example.org>wrote:
> On Tue, Jun 19, 2012 at 12:39 AM, MinRK <email@example.com> wrote:
> > This happens at the zeromq level - IPython has no way of controlling
> Question, what's the number of open fds per engine right now (plus any
> others opened by the hub)? At least if we advertise what the formula
> is, users could tweak their job submission scripts to test their
> environment and only request a total number of engines that's safe
> given the constraints they find...
I believe there are 3 new FDs per engine in the Hub process (7 with
--usethreads), and there are various other fds open to start with, so I
think you should generally be safe starting ulimit / 4 engines.
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