DoveCot vs Cyrus-Imapd Performance

[Aleksandar Milivojevic]

Les Mikesell wrote:
>>And exactly how scalable are user accounts (the ones stored in flat file called
>>/etc/passwd)?  That will not scale well. 
> 
> I think you know that's irrelevant for anything using PAM.  Dovecot is
> equally capable.

It is relevant the very moment you place your users in /etc/passwd. 
PAM, or no PAM.  Users in remote database with PAM to glue them to local 
accounts is another story.  Cyrus can use both PAM and native libraries 
to access remote database.  So simply choose the one you like more (PAM, 
or native).  For Kerberos, you'll probably want SASL/GSSAPI, for 
LDAP/SQL/NIS it doesn't really matter.

>>You want to use Webmin or Postfix admin, and manage users in LDAP database?  No
>>problem.  Just point Cyrus to your LDAP database, and it will be happy with it.
>> Probably happier than Dovecot, and way more happier than wu-imapd.
> 
> Ah, now we are getting back to something actually relevant to fedora.
> It would be really nice if a packaged LDAP configuration worked out
> of the box and included the schemas needed for a posix account, a samba
> account, and the mail delivery stuff that sendmail and postfix can
> use for distributing mail with user at domain addressing across multiple
> machines, along with tools to manage the database.  Does this exist
> somewhere?  All the versions I've seen involve customizing the schemas
> and I've always been afraid that as soon as I did that a working but
> incompatible version would become part of the distribution.

AFAIK, Fedora comes with all standard schema files distributed with 
OpenLDAP.  This includes posixAccount object class (part of nis.schema, 
and guess what, slapd.conf as shipped in Fedora RPM includes it at the 
very beggining).  There's one additional schema file for autofs inthere 
too.  Check /etc/openldap/schema directory for more.  If you need to add 
some "nonstandard" schema, such as for example the one describing 
Kerberos principals, or the one used by Sendmail 
(/usr/share/sendmail-cf/sendmail.schema), simply drop it into that 
directory and include it from slapd.conf or include it directly from 
wherever it originally lives (if it is already part of an RPM, such as 
the one for Sendmail).

I don't have Samba installed anywhere handy to check it out, but I'd 
venture that its schema file is included in Samba RPM, or at least in 
Samba's doc RPM (simply copy it over to your LDAP server).

-- 
Aleksandar Milivojevic <amilivojevic at pbl.ca>    Pollard Banknote Limited
Systems Administrator                           1499 Buffalo Place
Tel: (204) 474-2323 ext 276                     Winnipeg, MB  R3T 1L7