[Dovecot] 1 week after full migration to 1.1v

[Raphael Bittencourt S. Costa]

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