Robert Schetterer wrote:
Timo Sirainen schrieb:
On Aug 11, 2009, at 12:41 AM, Seth Mattinen wrote:
Nothing forces you to switch from maildir, if you're happy with it :) But if you want to support millions of users, it's simpler to distribute the storage and disk I/O evenly across hundreds of servers using a database that was designed for it. And by databases I mean here some of those key/value-like databases, not SQL. (What's a good collective name for those dbs anyway? BASE and NoSQL are a couple names I've seen.)
Why is a database a better choice than a clustered filesystem? Show me a clustered filesystem that can guarantee that each file is stored in at least 3 different data centers and can scale linearly by simply adding more servers (let's say at least up to thousands).
Clustered filesystems are also complex. They're much more complex than what Dovecot really requires.
i like the idea of sql based mail services whatever your choice is, use of cluster file systems stays ever, but with databased setups it should much more easy to have redudant mailstores, i have all possible stuff quota, acl etc in a database yet, incl spamassassin, greylisting, webmail the only thing which is left ,is the mail store, it would be great if there would be the possibility to have that, if there are no big disadvantages like poor performance etc with it
there is http://www.dbmail.org/ has sombody ever used it ? so it can be compared
It wouldn't be an SQL database - it's not really suitable for this kind of thing at the scale Timo is proposing.
~Seth