On Mon, 2012-02-27 at 01:07 +0100, Maria Arrea wrote: > 1º General mdbox question. We are happy usings zlib_save, but we > would like to try bzip2 compression. Can we change zlib to bzlib > without problems? In other words, can we mix & match gzipped and > bzipped messages in the same mdbox file ?
Yes. > 2º With doveadm altmove we can move messages matching a pattern to > alternate storage. I have read an older post in this mailing list > about passing specific mdbox options to doveadm altmove. Should be a > good idea to have a "main" mdbox area with zlib 9 and mdbox_rotate=1d > and mdox_rotate_size=60m and an "alternate area" with bzip9, > mdbox_rotate=1 week and rotate_size > 60 MB? In the alternate area > should only be "old" mail (1 year older). I guess it makes sense. > 3º We have separate raids for indexes (raid 1+0) and mdboxes (raid > 5). We have almost 3 TB of gzipped mdboxes, and our backup (bacula) is > taking almost 16 hours to make a full backup. Our main problem is that > indexes are backupd hours before mdboxes, and that bring us some > inconsistencies. What is the "right" way of backing up for separate > indexes and mdboxes? The eventual solution is a Dovecot backup agent, but for now I guess there isn't anything better than taking filesystem snapshots.
