-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 06/29/2011 06:36 PM, William Blunn wrote: > On 28/06/2011 17:13, Davide Vaghetti wrote: >> I have one thousand virtual users with mdbox mailbox format and 10 >> GByte quota. I have noticed some performance problem related to >> I/O (the mailbox disk is a 6TB raid1+0 on ISCSI), so I want to put >> the index files on a different disk. My actual mail_location is: >> >> mail_location = mdbox:/var/vmail/%-1.1u/%u/mdbox >> >> and I want to switch to >> >> mail_location = >> mdbox:/var/vmail/%-1.1u/%u/mdbox:INDEX=/var/indexes/%-1.1u/%u/ >> >> But I cannot figure out a pair of things: >> >> - - do the switch trigger the rebuilding of the index files? > > !!!!! DANGER, DANGER !!!!!! > > Index files cannot be re-generated under mdbox > > Go away and read http://wiki2.dovecot.org/MailboxFormat/dbox > > "... with dbox the Index files actually contain significant data > which is held nowhere else. Index files for both *single-dbox* and > *multi-dbox* contain message flags and keywords. For *multi-dbox*, > the index file also contains the map_uids which link (via the "map > index") to the actual message data. This data cannot be automatically > recreated, so it is important that Index files are treated with the > same care as message data files." > > If you don't already know this, then you probably shouldn't even be > using mdbox. > >> - - can I get rid of all the old index files? > > NO! > >> - - how much the index files (no fts squat) can grow? > > First solve your understanding problem with mdbox, then worry about > details such as this. >
Bill, thanks for all the __important__ info. You almost saved my ass ;-) (BTW, that is why I was asking) I'll check again the documentation to better understand index in the mdbox context. Nontheless, I still have to care about the index files grow factor, so if you, or anyone else, can point me to the right documentation, or have a rule of thumbs to know it, please share it. Regards davide - -- Dott. Davide Vaghetti Centro Servizi Informatici Facolta' di Ingegneria Universita' di Pisa PGP: http://keys.keysigning.org:11371/pks/lookup?op=get&search=0x7A1B3BA18C4E0A4D -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk4MIUYACgkQehs7oYxOCk1pHwCfeomYITfTiyAhMC2oQhM3cFhW Vh8AoPBSRflEWP4sFTpD1vgZKya+0KtV =e7rX -----END PGP SIGNATURE-----
