hi
On Fri, 8 Dec 2000, Forrest Aldrich wrote:
> I've heard different stories about using maildir format. Mostly, of the
> negative aspect (allegedly) of using this on a high I/O mail system due to
> it using individual files -- I can't recall the caveat.
This is probably related to the number of files in the directory since you
have to read it every time and then you have to open individual files.
Generally, if you have more than 2,000 files in one directory on a generic
system, it could be a problem.
That depends on how well kernel level fs caching works, but still, I believe
it will create less IO than what I've described in my prev. messages.
Also note, that the longer you're holding the lock on the mailbox, the
longer it takes for LDA to deliver the message, so your LDA is waiting
for popper to rewrite the mailbox and MDA (sendmail) is waiting for your
LDA, all consuming system resources.
Anyway, I'm gonna try it with maildir and qmail popper and then I'll have
some real numbers...
--
rgds,
serge
