Hi there,
We're trying to convert users from Maildir to sdbox at present; I'm
using dsync to achieve this (2.0.16) however when the user's have been
converted we only get minimal information in the caching files. Is there
some way to preserve all the caching decisions that were previously made
so that when the user logs in to the new mailbox we don't have to cause
an io storm rebuilding the cache that we know was good? Dovecot seems to
be partially doing this - if i remove the logs/cache from the source
mailbox no cache files are built in the conversion; if i put them back
then we get a cache file built but it only contains a few bits of
information (guid, date.save). Looking into this a bit further i find
that when the caches are present at source the fields are preserved but
the 'last used' date and caching decisions are not which I suspect means
dsync doesn't bother caching on import - only fields with a yes decision
in the source are copied (but their decision is only copied as a tmp
with the date of import). For example:
Source idxview cache:
-- Cache fields --
# Name Type Size Dec Last used
0: flags bit 4 tmp
2011-11-25 16:09
1: date.received fix 4 yes
2011-11-26 16:17
2: size.virtual fix 8 tmp
2011-11-25 16:09
3: imap.bodystructure str - tmp
2011-11-25 16:09
4: mime.parts var - tmp
2011-11-25 16:09
5: hdr.IMPORTANCE hdr - tmp
2011-11-25 16:09
6: hdr.X-PRIORITY hdr - tmp
2011-11-25 16:09
7: hdr.CONTENT-TYPE hdr - tmp
2011-11-25 16:09
...
18: date.sent fix 8 no
1970-01-01 01:00
19: date.save fix 4 yes
2011-11-26 16:17
20: size.physical fix 8 no
1970-01-01 01:00
21: imap.body str - no
1970-01-01 01:00
... (24 total entries. stripped ones are just hdr. with a tmp decision)
dst cache:
# Name Type Size Dec Last used
0: flags bit 4 tmp
1970-01-01 01:00
1: date.sent fix 8 no
1970-01-01 01:00
2: date.received fix 4 tmp
1970-01-01 01:00
3: date.save fix 4 tmp
2011-11-26 16:19
4: size.virtual fix 8 tmp
1970-01-01 01:00
5: size.physical fix 8 no
1970-01-01 01:00
6: imap.body str - no
1970-01-01 01:00
7: imap.bodystructure str - tmp
1970-01-01 01:00
8: imap.envelope str - no!
1970-01-01 01:00
9: pop3.uidl str - no
1970-01-01 01:00
10: guid str - tmp
2011-11-26 16:19
11: mime.parts var - tmp
1970-01-01 01:00
12: hdr.IMPORTANCE hdr - tmp
1970-01-01 01:00
13: hdr.X-PRIORITY hdr - tmp
1970-01-01 01:00
...
and dst cached message for example:
RECORD: seq=57, uid=12207, flags=0x09 (Seen Answered)
- ext 1 modseq : 1 (0100000000000000)
- ext 3 cache : 5516 (8c150000)
- cache offset=5516 size=92, prev_offset = 0
- guid: 1321895282.XXXt,S=7399760,W=7496225
- date.save: 1322324286 (3e11d14e)
src idx record for this message contains pretty much all fields.
Thanks,
Mark
