[Dovecot] Dovecot MTA

[Robert Schetterer]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1



Am 11.11.2013 06:24, schrieb Edwardo Garcia:
> My company have 36 dovecots, one biggest ISP in country 3 million
> user, agree with Nick  poster, we had stop use dovecot load balance
> because too bad effect on primary database, now use single
> localhost, we have script run every 30 second to test login, if
> fail sleep 30 second, try again, fail and down ethernet interface
> so hardware load balancer see server not answer and can not use,
> nagios soon tell us of problem, very very bad and stupid way, but
> only option is safe, we have look at alternative to dovecot for 
> this and still look, not happy with unreliable softwares to
> immitate feature.
> 
> big network mean big time locate and fix problem when arise so you
> be good to say no extra point of failure. Too many cog in chain
> eventually lead to problem.

Wow thats big, and may have implications out of my scope, but database
replication is not the job of dovecot, after all why not use
loadbalancer like keepalived etc and setup proxies on them so you may
combine check feaures from loadbalancers to target related dovecot
proxies, which themselves conect to backhand dovecot servers, also its
easy to monitor, for sure you may need some shared storage too, which
is again not real related to dovecot , i tested ceph , so i think its
possible to have seperate mount points with i.e ocfs2 for each domain.

At the end ,for such big setups there should be enough budget to get
things solved by hire specialists for each software part which is involved


Best Regards
MfG Robert Schetterer

- -- 
[*] sys4 AG

http://sys4.de, +49 (89) 30 90 46 64
Franziskanerstraße 15, 81669 München

Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263
Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer
Aufsichtsratsvorsitzender: Florian Kirstein
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iQEcBAEBAgAGBQJSgJWEAAoJEP8jBObu0LlEjpcIAKcZofBBiVGw9EqKzmEoGqTq
y3A0CqnsmSmi21V5ofBlyrYpNSkusd+V2mKPFIUBoABwpFyWxUsQgO5n22lGX70+
7Tkqa4ClBM7ImrXVfZ/uznkDlOwfIZGomIoouYPdm+4mq5oRVv+jmUv4PBg9fzi2
6cVOG8WBMuLtx/vBJypWoixxd075pv0/mCXSHZvFL9Th8TAk39p73rZ+woJPcN3w
Qb6EKNcaOvl9PNVzjpquDP9jWrynUCCp70sUAhnHqc0778m2Gjx5boj2kXpSpgPz
Tro9F6UesJU62sAyjzled2Jm2XH5EuhAhwLOlUZP88B1N7Ijs7vHTfnWPQelnaM=
=pBeW
-----END PGP SIGNATURE-----