Sorry, bit of a typo on my part. I meant concurrent number of sockets. If you want to support a high number of concurrent sockets that are rarely active then real-time signals are the way to go. However, we are getting off-topic, so we can finish this up on irc since we are sitting in the same channel right now anyway.
-Matt > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On > Behalf Of Michael Poole > Sent: Monday, June 03, 2002 9:43 PM > To: [EMAIL PROTECTED] > Subject: Re: scalable network architectures (was RE: [Mono-list] Mono > fitness for ircd project) > > "Matt Liotta" <[EMAIL PROTECTED]> writes: > > > We were talking about scalable in the context of current number of > > sockets. Real-time signals allow for significantly more current sockets > > than any other architecture. > > > > -Matt > > I think this oversimplifies things. There are two important counts of > sockets: total sockets and active sockets. Which (or what else) did > you mean by "current sockets"? > > Scaling up the total number of sockets is usually done by adding or > removing sockets one or a few at a time -- /dev/poll, kqueue() and > real-time signals all do this. select() and poll() require the app > list all sockets for each system call. > > Scaling up the number of active sockets is done by reporting only > active sockets instead of status for all the sockets. Again, select() > and poll() do this poorly; /dev/poll, kqueue() and signals do it > better. > > If each active socket only requires a little bit of user-space work > (e.g. HTTP or IRC), delivering a signal for each one adds a lot of > overhead. Delivering activity notices in groups reduces this > overhead, and so allows sockets to be active more often. The cost is > that the app may end up waiting longer before it learns of activity > for a given socket. > > -- Michael > > _______________________________________________ > Mono-list maillist - [EMAIL PROTECTED] > http://lists.ximian.com/mailman/listinfo/mono-list _______________________________________________ Mono-list maillist - [EMAIL PROTECTED] http://lists.ximian.com/mailman/listinfo/mono-list
