Linux Certif

Toute la documentation sur la certification Linux LPI

dbcheck

NAME

 dbcheck - Bacula's Catalog Database Check/Clean program

SYNOPSIS

bcopy [options] working-directory bacula-database user password [dbhost] [dbport]

DESCRIPTION

This manual page documents briefly the dbcheck command.

dbcheck will not repair your database if it is broken. Please see your vendor's instructions for fixing broken database.

dbcheck is a simple program that will search for logical inconsistencies in the Bacula tables in your database, and optionally fix them. It is a database maintenance routine, in the sense that it can detect and remove unused rows, but it is not a database repair routine. To repair a database, see the tools furnished by the database vendor. Normally dbcheck should never need to be run, but if Bacula has crashed or you have a lot of Clients, Pools, or Jobs that you have removed, it could be useful.
                              It is called:

Usage: dbcheck [-c config] [-C catalog name] [-d debug_level] []
       -b              batch mode
       -C              catalog name in the director conf file
       -c              director conf filename
       -B              print catalog configuration and exit
       -dnn            set debug level to nn
       -dt             print timestamp in debug output
       -f              fix inconsistencies
       -v              verbose
       -?              print this message

If the -c option is given with the Director's conf file, there is no need to enter any of the command line arguments, in particular the working directory as dbcheck will read them from the file.

If the -f option is specified, dbcheck will repair (fix) the inconsistencies it finds. Otherwise, it will report only.

If the -b option is specified, dbcheck will run in batch mode, and it will proceed to examine and fix (if -f is set) all programmed inconsistency checks. If the -b option is not specified, dbcheck will enter interactive mode and prompt with the following:

Hello, this is the database check/correct program. Please select the function you want to perform.
     1) Toggle modify database flag
     2) Toggle verbose flag
     3) Repair bad Filename records
     4) Repair bad Path records
     5) Eliminate duplicate Filename records
     6) Eliminate duplicate Path records
     7) Eliminate orphaned Jobmedia records
     8) Eliminate orphaned File records
     9) Eliminate orphaned Path records
    10) Eliminate orphaned Filename records
    11) Eliminate orphaned FileSet records
    12) Eliminate orphaned Client records
    13) Eliminate orphaned Job records
    14) Eliminate all Admin records
    15) Eliminate all Restore records
    16) All (3-15)
    17) Quit Select function number:

By entering 1 or 2, you can toggle the modify database flag (-f option) and the verbose flag (-v). It can be helpful and reassuring to turn off the modify database flag, then select one or more of the consistency checks (items 3 through 9) to see what will be done, then toggle the modify flag on and re-run the check.

The inconsistencies examined are the following:

Duplicatefilenamerecords.Thiscanhappenifyouaccidentallyruntwo
   copies of Bacula at the same time, and they are both adding filenames
   simultaneously.  It is a rare occurrence, but will create an
   inconsistent database.  If this is the case, you will receive error
   messages during Jobs warning of duplicate database records.  If you are
   not getting these error messages, there is no reason to run this check.

RepairbadFilenamerecords.Thischecksandcorrectsfilenamesthathave
   a trailing slash.  They should not.

RepairbadPathrecords.Thischecksandcorrectspathnamesthatdonot
   have a trailing slash.  They should.

Duplicatepathrecords.Thiscanhappenifyouaccidentallyruntwocopies
   of Bacula at the same time, and they are both adding filenames
   simultaneously.  It is a rare occurrence, but will create an
   inconsistent database.  See the item above for why this occurs and how
   you know it is happening.

OrphanedJobMediarecords.ThishappenswhenaJobrecordisdeleted
   (perhaps by a user issued SQL statement), but the corresponding JobMedia
   record (one for each Volume used in the Job) was not deleted.  Normally,
   this should not happen, and even if it does, these records generally do
   not take much space in your database.  However, by running this check,
   you can eliminate any such orphans.

OrphanedFilerecords.ThishappenswhenaJobrecordisdeleted(perhaps
   by a user issued SQL statement), but the corresponding File record (one
   for each Volume used in the Job) was not deleted.  Note, searching for
   these records can be very time consuming (i.e.  it may take hours) for a
   large database.  Normally this should not happen as Bacula takes care to
   prevent it.  Just the same, this check can remove any orphaned File
   records.  It is recommended that you run this once a year since orphaned
   File records can take a large amount of space in your database.  You
   might want to ensure that you have indexes on JobId, FilenameId, and
   PathId for the File table in your catalog before running this command.

OrphanedPathrecords.Thisconditionhappensanytimeadirectoryis
   deleted from your system and all associated Job records have been
   purged.  During standard purging (or pruning) of Job records, Bacula
   does not check for orphaned Path records.  As a consequence, over a
   period of time, old unused Path records will tend to accumulate and use
   space in your database.  This check will eliminate them.  It is
   recommended that you run this check at least once a year.

OrphanedFilenamerecords.Thisconditionhappensanytimeafileis
   deleted from your system and all associated Job records have been
   purged.  This can happen quite frequently as there are quite a large
   number of files that are created and then deleted.  In addition, if you
   do a system update or delete an entire directory, there can be a very
   large number of Filename records that remain in the catalog but are no
   longer used.

   During standard purging (or pruning) of Job records, Bacula does not
   check for orphaned Filename records.  As a consequence, over a period of
   time, old unused Filename records will accumulate and use space in your
   database.  This check will eliminate them.  It is strongly recommended
   that you run this check at least once a year, and for large database
   (more than 200 Megabytes), it is probably better to run this once every
   6 months.

OrphanedClientrecords.Theserecordscanremaininthedatabaselong
   after you have removed a client.

OrphanedJobrecords.Ifnoclientisdefinedforajoboryoudonotrun
   a job for a long time, you can accumulate old job records.  This option
   allow you to remove jobs that are not attached to any client (and thus
   useless).

AllAdminrecords.ThiscommandwillremoveallAdminrecords,
   regardless of their age.  

AllRestorerecords.ThiscommandwillremoveallRestorerecords,
   regardless of their age. 

By the way, I personally run dbcheck only where I have messed up my database due to a bug in developing Bacula code, so normally you should never need to run dbcheck inspite of the recommendations given above, which are given so that users don't waste their time running dbcheck too often.

SEE ALSO

bls(1), bextract(1).

AUTHOR

This manual page was written by Jose Luis Tallon <jltallon@adv-solutions.net>.