Cyrus IMAP 2.3.9 on Solaris 10 with ZFS and SAN

[Daniel O'Connor]

On Sat, 22 Sep 2007, Bron Gondwana wrote:
> On Fri, Sep 21, 2007 at 05:53:48PM -0400, Wesley Craig wrote:
> > On 21 Sep 2007, at 13:36, Pascal Gienger wrote:
> > > A proxy would mean another possibility of failure. How stable is
> > > that proxy daemon? Another two boxes for redundancy?
> >
> > UMich runs the caching proxy on the host running httpd/webmail. 
> > up- imapproxy is very stable.
>
> Fastmail runs our own "imappool" which is a funky daemon capable
> of passing FDs around between processes.  I don't know how it works
> precisely, but it uses Socket::Pool which had a sourceforge project
> and doesn't appear to any more.  My guess is that I'd rather not
> look at the code for fear of going totally insane.

You can pass file descriptors over UNIX domain sockets, see SCM_RIGHTS. 
Here is some code Google found -> 
http://search.cpan.org/src/SAMPO/Socket-PassAccessRights-0.03/passfd.c

It's a feature, not an insane kludge!

You can pass process credentials too.

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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