Re: [binc] Maildirsize
Jason 'XenoPhage' Frisvold <[email protected]>
| Newsgroups | gmane.mail.imap.binc.general |
|---|---|
| Message-ID | <[email protected]> |
Andreas Aardal Hanssen wrote: >For the record: > >http://www.inter7.com/courierimap/README.maildirquota.html > >Unfortunately, the maildirsize answer I can give for 1.2 isn't an >uplifting one. :-) > >1) The size of a message takes quite a while to figure out, and the main > reason for that is that the files are stored in LF/Unix style in > Maildir (why, oh why?), so calculating the size requires the file to be > read and converted to CRLF, which is what IMAP requires. The storing of > the size in the file name does break a do-not in the (somewhat loose) > Maildir spec, but the I/O load impact is the biggest problem... Opening > a mailbox with 5000 messages, calculating the size of each message, > renders an average mail server useless because of the immense I/O load. > > Any idea how vpopmail does this? It seems to rebuild the maildirsize file in a matter of seonds... >2) maildirsize is documented to be inaccurate. For it to work precisely, > _all_ software accessing the Maildir must adhere to the same rules, and > this is a restriction that Binc IMAP does not enforce - Binc IMAP is a > non-intrusive IMAP server. > > What's the alternative to maildirsize? ie, how do you prevent a user from filling up the hard drive with mail?? >For your specific need, you could implement maildirsize managing code in >Binc IMAP (and in your delivery agent). It shouldn't be too much code. But >I can't include it in 1.2 at least. It is on the list for 1.3, but an >efficient quota management implementation really requires a different >mailbox format. :-( > > Does IMAPDir have this ability? We're basically running IMAPDir ... I just have to keep the links around to satisfy vpopmail... >Andy :-) > > -- --------------------------- Jason 'XenoPhage' Frisvold Engine / Technology Programmer [email protected] RedHat Certified - RHCE # 803004140609871 MySQL Pro Certified - ID# 207171862 MySQL Core Certified - ID# 205982910 --------------------------- "Something mysterious is formed, born in the silent void. Waiting alone and unmoving, it is at once still and yet in constant motion. It is the source of all programs. I do not know its name, so I will call it the Tao of Programming."