Re: [imapsync] speed problem for large mails

[Gilles LAMIRAL <gilles dot lamiral at laposte dot net>]

Hello Stefan, 

> > Is there the same issue from localhost to localhost ?
> 
> Yes.
> I tested with a Dual PIII 1.5GHz, and a Core2Duo 2.33, where in the
> first test the destination Cyrus was in a VMware guest.

This is not real localhost to localhost.
VMware guest is a special environment.

> > What are your kernel, perl release, architecture ?
> 
> 2.6.18 with perl 5.8.8 for testing purposes with a different perl
> version
> 2.6.25.18 for the source cyrus 2.3.11
> 2.6.27.7 for destination cyrus with perl 5.10.0

Architectures ?

> > Since we're in system calls the perl script can't do many
> > things to solve this problem.
> 
> I feared you might say that.

Test without vmware. Some users reported issues with vmware, solved
without vmware.

> > Try:
> >   --split1 100
> 
> This will not help, as the problem is one large mail.

The problem is memory and I've seen strange things,
have a try.

> > You can try --maxsize in a first run then a second run
> > for big messages.
> 
> Yeah, but I do not know, when I can deliver the large mails to my
> users...

Later or first.
You can run several slow imapsync in parallel.
You can prepare the final switch with previous --delete2 calls.

-- 
Au revoir,                               02 99 64 31 77
Gilles Lamiral. France, Chavagne (35310) 06 20 79 76 06