[Dovecot] Question about "slow" storage but fast cpus, plenty of ram and dovecot

Eric Rostetter rostetter at mail.utexas.edu
Sat Dec 11 18:47:42 EET 2010

Quoting a at test123.ru:

> Guys. Who is interested in obvious reasoning?

The same people who are interested in vague questions?

> Let me remind original concrete question. I am also interested.
>> We can "exchange" CPU & RAM to minimize disk i/o.
>> Should we change to dovecot 2.0?
>> Maybe mdbox can help us?
>> Maybe ext4 instead of ext3?

Uhm, well, again, depends on your needs.  Pop3? Imap? Both?  Number of
accounts?  Can't really help without more details.  Maybe I can't help
with more details either, but that is a risk you take on a mailing list.

> 1. Is migration to dovecot 2.0 good idea if I want to decrease I/O?

Depends on what version you run now really.  But I would recommend it
anyway just on principle.

> 2. Can mdbox help decrease IO?
> 3. What is better for mdbox or maildir - ext3 or ext4?

Dont' know.  But you can certainly tune the FS in either case (atime/dtime,
flush rate, external journal, etc).  Some will say XFS is better, etc.
Besides, you can hardly decide the best FS until you know the mailbox
format (mbox, maildir, mdbox, etc).

If you want concret answers, you need concret questions...

Eric Rostetter
The Department of Physics
The University of Texas at Austin

Go Longhorns!

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