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I am writing now writing some evented code (In python using gevent) and I use the nginx as a web server and I feel both are great. I was told that there is a trade off with events but was unable to see it. Can someone please shed some light?
James
Biggest issue is that without threads, a block for one client will cause a block for all client. For example, if one client requests a resource (file on disk, paged-out memory, etc) that requires the OS to block the requesting process, then all clients will have to wait. A multithreaded server can block just the one client and continue to serve others.
That said, if the above scenario is unlikely (that is, all clients will request the same resources), then event-driven is the way to go.