Ken,
Is there a way to do PLAIN from the frontends to the backends? The
servers I am testing are on a isolated network no network traffic other than
the mail servers. Any help would be appreciated. sasl_maximum_layer:0 didn't
seem to change the pop3 proxy timing. The server are also dual 1.4s with 2
gigs of ram if that helps at all.
--Mike
----- Original Message -----
From: "Ken Murchison" <[EMAIL PROTECTED]>
To: "Michael J Farina" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Thursday, March 11, 2004 4:58 PM
Subject: Re: pop3d proxy
> Michael J Farina wrote:
>
> > I am setting up a cyrus imap murder for a large number of accounts. In
my
> > stress testing I have noticed that the pop3 proxy has quite a delay.
When I
> > connect directly to a backend I can check mail at a very fast rate about
.5
> > secs a mailbox. When I connect to the proxy the wait time increases a
ton to
> > about 5 secs. I am thinking I must have a configuration problem. I will
> > include my imapd.conf and my cyrus.conf I am using cyrus 2.2.3.
>
> Once you authenticate and the mailbox is opened on the backend, the
> proxy just acts as a bitpipe between the client and backend, so there
> should be very little overhead.
>
> You *might* be seeing a slowdown because the frontend is authenticating
> to the backend using DIGEST-MD5 with a security layer or TLS+PLAIN. In
> either case you have encrypt/decrypt overhead.
>
> If using DIGEST-MD5, you could try setting sasl_maximum_layer:0 on the
> backend, which will prevent the security layer from being negotiated.
>
> Otherwise, the only other delay that I could think of would be network
> related.
>
>
> > Frontend cyrus.conf
> >
> > START {
> > mboxlist cmd="ctl_cyrusdb -r"
> > }
> >
> > # UNIX sockets start with a slash and are put into /var/imap/sockets
> > SERVICES {
> > # mupdate database service - must prefork atleast 1
> > mupdate cmd="/usr/cyrus/bin/mupdate -m" listen=3905 prefork=1
> >
> > # add or remove based on preferences
> > imap cmd="proxyd" listen="imap" prefork=5
> > pop3 cmd="pop3proxyd" listen="pop3" prefork=5 maxchild=-1
> > sieve cmd="timsieved" listen="sieve" prefork=0
> >
> > lmtp cmd="lmtpproxyd" listen="/var/imap/socket/lmtp"
prefork=0
> > }
> >
> > EVENTS {
> > checkpoint cmd="ctl_cyrusdb -c" period=5
> > }
> >
> > Frontend imapd.conf
> >
> > configdirectory: /var/imap
> > partition-default: /tmp
> > admins: cyrus
> > sasl_pwcheck_method: saslauthd
> > allowplaintext: 1
> > mupdate_admin: murder
> > mupdate_server: frontend
> > mupdate_password: murder pass
> > proxy_authname: proxy
> > proxy_password: proxy pass
> > unixhierarchysep: 1
> > sasl_mech_list: PLAIN
> >
> >
> > Backend cyrus.conf
> >
> > START {
> > recover cmd="ctl_cyrusdb -r"
> > mupdatepush cmd="ctl_mboxlist -m"
> > }
> >
> > # UNIX sockets start with a slash and are put into /var/imap/sockets
> > SERVICES {
> > # add or remove based on preferences
> > imap cmd="imapd" listen="imap" prefork=5
> > pop3 cmd="pop3d" listen="pop3" prefork=0 maxchild=-1
> >
> > # at least one LMTP is required for delivery
> > lmtp cmd="lmtpd" listen="lmtp" prefork=2
> >
> > }
> > EVENTS {
> > # this is required
> > checkpoint cmd="ctl_cyrusdb -c" period=5
> > }
> >
> > Backend imapd.conf
> >
> > configdirectory: /var/imap
> > partition-default: /var/spool/imap
> > admins: cyrus
> > mupdate_server: frontend
> > mupdate_authname: murder
> > mupdate_password: murder pass
> >
> > allowplaintext: yes
> > sasl_pwcheck_method: saslauthd
> > sasl_mech_list: PLAIN DIGEST-MD5
> > proxyservers: proxy
> > unixhierarchysep: 1
> > defaultacl: anyone rsd
> >
> >
> > ---
> > Home Page: http://asg.web.cmu.edu/cyrus
> > Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
> > List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
> >
>
>
> --
> Kenneth Murchison Oceana Matrix Ltd.
> Software Engineer 21 Princeton Place
> 716-662-8973 x26 Orchard Park, NY 14127
> --PGP Public Key-- http://www.oceana.com/~ken/ksm.pgp
>
>
---
Home Page: http://asg.web.cmu.edu/cyrus
Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
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