ejabberd - Comments for "External Authentication and Scalability"

Re: External Authentication and Scalability

xram@jabber.ru — Fri, 20 Jun 2008 00:57:19 +0000

jsevans wrote:

does the PAM support give you essentially the same thing but as an "external" module?

PAM authentication method has the same logic as an external method, since it uses an external C-program.

jsevans wrote:

So if you want to write a custom authentication module that has minimal performance impact, are you better off doing that as a patch to ejabber's "internal" authentication mechanism

True, but it depends :)

Re: External Authentication and Scalability

jsevans — Thu, 19 Jun 2008 20:31:48 +0000

Bummer! So if you want to write a custom authentication module that has minimal performance impact, are you better off doing that as a patch to ejabber's "internal" authentication mechanism, or does the PAM support give you essentially the same thing but as an "external" module?

Thanks!

-jse

Re: External Authentication and Scalability

xram@jabber.ru — Wed, 18 Jun 2008 14:09:35 +0000

There is only one erlang process (aka thread) per virtual host. Thus, auth request processing is sequential, and, of course, it is a possible scalability impact in the case when an external script is too slow.