On 29.10.2012, at 23.54, Christoph Anton Mitterer wrote: > On Mon, 2012-10-29 at 23:42 +0200, Timo Sirainen wrote: >>> btw: What are the actual advantages of sdbox over maildir? >> >> * Not moving files from new/ to cur/ directory >> * Not renaming files when changing message flags >> * Not readdir()ing directories (although maildir_very_dirty_syncs=yes helps >> a lot with this) >> >> Basically less disk I/O and making it possible to have mailboxes with a huge >> number of messages without everything slowing down horribly. > > Oh that's quite some advantage... > > And I guess the interior of the files is the same? I.e. just the plain > mail without any changes or quoting?
Yes, but it's in dbox format so it contains also some extra metadata (not in the mail headers). > For sdbox, does that part with "loosing the indexes means game > over" ;) , too? You'll lost message flags then. Both sdbox and mdbox keep dovecot.index.backup files and repairing tries very hard to preserve everything from the indexes it sees, so I don't think it's a big concern as long as the system behaves properly.
