Timo Sirainen wrote:
On Tue, 2008-10-07 at 11:38 +0400, Andrey Panin wrote:
On 279, 10 05, 2008 at 10:38:02PM +0300, Timo Sirainen wrote:
On Sun, 2008-10-05 at 21:28 +0200, Luuk wrote:
Last but not least, what gain will i have by using this plugin in
combination with Maildir, or will it have more impact when mails are
stored in mbox.
I guess it depends on the size of your mails. With mboxes it can be used
only with read-only archives, so it's not all that useful. With maildir
it can be used transparently with read-write mailboxes. I've no idea
what the performance difference or space improvements are. I guess
that'll also depend on your system.
I use zlib compressed maildirs on my primary server (12000+ users) and it
achieves average compression ratio of 1.8, so if your system is io-bound
you can spend some cpu cycles to significantly decrease disk load.
But is that 1.8 in bytes or disk blocks? Or does it make much of a
difference either way? Does 2x less space per message even matter with
small messages since most disk I/O probably goes to seeking, so reading
a single 4 kB message takes pretty much the same time as a 8 kB message?
Just throwing in my 0.02 currency units...
... obviously, which messages you choose to compress is up to you, and
should be tuned depending on your system. Certainly, I wouldn't bother
compressing anything smaller than 1 allocation block (whatever that is on
your FS), and even 2, unless your CPU is really idle.
The larger the message, the greater the potential rewards.
PS: Timo... "2x smaller"? ... somehow, I expected better of you :)
--
Curtis Maloney
[EMAIL PROTECTED]
