I have configured my system to use SIS, sharing the same same storage for all users, and offline deduplication.

I have this in my "root" cron:

""" 53 1 * * * /usr/local/bin/doveadm purge -A 16 * * * * /usr/local/bin/doveadm sis deduplicate /home/dovecot/buzones/attachments /home/dovecot/buzones/attachments/queue """

Yes, it is launched as "root" but I would expect doveadm drop privileges as soon as possible.

This is working great, but from time to time I get this error message:

""" Your "cron" job on babylon5 /usr/local/bin/doveadm sis deduplicate /home/dovecot/buzones/attachments /home/dovecot/buzones/attachments/queue

produced the following output:

Error: mkdir(/home/dovecot/buzones/attachments/dc/62/hashes) failed: No such file or directory """

Looks like doveadm is trying to create the "hashes" directory but the parent "62" doesn't exits yet. If I create that directory by hand and set permissions correctly, everything (seems to) work.

Talking about this, I see something strange wit the permissions.

All files and directories in SIS are created with "dovemail" user and group EXCEPT the "hashes" directory inside the newly created directory.

That is:

When I get the error message, I have this:

""" drwx------ 7 dovemail dovemail 7 Apr 1 13:28 . drwx------ 237 dovemail dovemail 237 Mar 24 20:09 .. drwx------ 3 dovemail dovemail 3 Feb 29 02:30 1d drwx------ 3 dovemail dovemail 3 Mar 9 01:53 7f drwx------ 3 dovemail dovemail 3 Feb 29 02:30 88 drwx------ 3 dovemail dovemail 3 Feb 29 02:30 8d """

I create the missing directory by hand and change permissions. Now I have:

""" drwx------ 7 dovemail dovemail 7 Apr 1 13:28 . drwx------ 237 dovemail dovemail 237 Mar 24 20:09 .. drwx------ 3 dovemail dovemail 3 Feb 29 02:30 1d drwx------ 3 dovemail dovemail 3 Apr 1 13:30 62 drwx------ 3 dovemail dovemail 3 Mar 9 01:53 7f drwx------ 3 dovemail dovemail 3 Feb 29 02:30 88 drwx------ 3 dovemail dovemail 3 Feb 29 02:30 8d """

I run the deduplicator again (as root) and it creates a "hashes" directory inside the "62" directory... with user/group root/root.

""" drwx------ 2 root root 2 Apr 1 13:30 hashes """

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