DBD(1)
NAME
dbd - CNID database maintanance
SYNOPSIS
dbd [-evx] {-d [-i] | -s [-c|-n] | -r [-c|-f] | -u} volumepath
DESCRIPTION
dbd can dump, scan, reindex and rebuild Netatalk dbd CNID databases. It
must be run with appropiate permissions i.e. as root.
COMMANDS
- -d
- Dump CNID database. With -i dump indexes too.
- -s
- Scan volume:
- o Compare CNIDs in database with volume
- o Test if .AppleDouble directories exist
- o Test if AppleDouble files exist
- o Report orphaned AppleDouble files
- o Report directories inside .AppleDouble directories
- o Check name encoding by roundtripping, log on error
- o Check for orphaned CNIDs in database (requires -e)
- o Open and close adouble files
Options:-c Don't check .AppleDouble stuff, only check orphaned.-n Don't open CNID database, skip CNID checks, only
traverse filesystem - -r
- Rebuild volume. With -f wipe database and rebuild from CNIIDs stored in AppleDouble files.
- o Sync CNIDSs from database with volume
- o Ensure .AppleDouble directories exist
- o Ensure AppleDouble files exist
- o Delete orphaned AppleDouble files
- o Report directories inside .AppleDouble directories
- o Check name encoding by roundtripping, log on error
- o Delete orphaned CNIDs in database (requires -e)
- o Open and close adouble files
Options:-c Don't create .AppleDouble stuff, only cleanup
orphaned.-f Wipe database and rebuild from IDs stored in
AppleDouble files, only available for volumes without
nocnidcache option. Implies -e. - -u
- Prepare upgrade:
- Before installing an upgraded version of Netatalk that is
linked against a newer BerkeleyDB lib, run `dbd -u ...`
from the OLD Netatalk pior to upgrading on all volumes.
This removes the BerkleyDB environment. On exit cnid_dbd
does this automatically, so normally calling dbd -u should not be necessary !
OPTIONS
- -e
- Only work on inactive volumes and lock them (exclusive)
- -x
- Rebuild indexes (just for completeness, mostly useless!)
- -v
- verbose
WARNING
In order to be able to run -rf reconstructing the CNIDs in the database
from the AppleDouble files, make sure you've run a -r rebuild sometimes
before, where the CNIDs then would have been synched between database
and AppleDouble files.
Also be careful about the option nocnidcache. Avoid this option if at
all possible, because if prevents you from being able to use -f.
CNID BACKGROUND
The CNID backends maintains name to ID mappings. If you change a
filename outside afpd(8) (shell, samba), the CNID db will not know and
not reflect that change. Netatalk tries to recover from such
inconsistencies as gracefully as possible. The mechanisms to resolve
such inconsistencies may fail sometimes, though, as this is not an easy
task to accomplish. E.g. if several names in the path to the file or
directory have changed, things may go wrong.
If you change a lot of filenames at once, chances are higher that the
afpds fallback mechanisms fail, i.e. files will be assigned new IDs,
even though the file hasn't changed.