[Dovecot] 1 week after full migration to 1.1v

Joe Wong joewong at tkodog.no-ip.com
Mon Jun 23 17:58:05 EEST 2008


Hi Raphael,

Can you also share the figures on the average mailbox size and number of 
cocurrent users in peak hour before and after migration? What is your 
hardware configuration (CPU / MEMORY / DISK TYPE )?

- Joe

----- Original Message ----- 
From: "Raphael Bittencourt S. Costa" <raphaelbscosta at gmail.com>
To: "dovecot" <dovecot at dovecot.org>
Sent: Monday, June 23, 2008 10:36 PM
Subject: [Dovecot] 1 week after full migration to 1.1v


> Ehlo all,
>
> I've been working on a migration of about 240K users from one server
> with qmail, courier imap, maildrop and ldap to postfix, dovecot, lda
> +sieve. Before the migration the server and the storage were always on
> high load.
>
>
> Before migration:
>
> Storage IOPs = 4600
> Read average  = 2800
> Write average = 1800
>
> Storage CPU (Raid5)
> Crl0 = 50%
> Crl1 = 50%
>
> Server Load = 120
> %user = 35
> %system = 60
> %iowait = 5
> %idle = 0
>
> After migration:
>
> Storage IOPs = 3000
> Read average  = 1200
> Write average = 1800
>
> Storage CPU (Raid5)
> Crl0 = 40%
> Crl1 = 40%
>
> Server Load = 25
> %user = 10
> %system = 27
> %iowait = 40
> %idle = 23
>
> And now the server responds so quickly to any imap command.
>
>
> Dovecot is now the default imap/pop server here, Thanks Timo.
>
>
> []s,
>
> Raphael Costa
>
>
>
>
> 



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