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       db4.8_archive - Find unused log files for archiving purposes


       db4.8_archive [-adlsVv] [-h home] [-P password]


       The db4.8_archive utility writes the pathnames of log files that are no
       longer in use (for example, no longer involved in active transactions),
       to  the standard output, one pathname per line.  These log files should
       be written to backup media to provide  for  recovery  in  the  case  of
       catastrophic  failure  (which  also requires a snapshot of the database
       files), but they may then be deleted from the system  to  reclaim  disk


       -a     Write  all  pathnames as absolute pathnames, instead of relative
              to the database home directories.

       -d     Remove log files that are no longer  needed;  no  filenames  are
              written.    Automatic   log  file  removal  is  likely  to  make
              catastrophic recovery impossible.

       -h     Specify a  home  directory  for  the  database  environment;  by
              default, the current working directory is used.

       -l     Write  out  the pathnames of all the database log files, whether
              or not they are involved in active transactions.

       -P     Specify an environment password.  Although Berkeley DB utilities
              overwrite  password  strings as soon as possible, be aware there
              may be a window of vulnerability on systems  where  unprivileged
              users  can see command-line arguments or where utilities are not
              able  to  overwrite  the  memory  containing  the   command-line

       -s     Write  the  pathnames  of all the database files that need to be
              archived in order to  recover  the  database  from  catastrophic
              failure.   If  any  of the database files have not been accessed
              during the lifetime of the current log files, db4.8_archive will
              not include them in this output.

              It  is  possible  that some of the files to which the log refers
              have  since  been  deleted  from  the  system.   In  this  case,
              db4.8_archive  will ignore them.  When db4.8_recover is run, any
              files to which the  log  refers  that  are  not  present  during
              recovery  are  assumed  to  have  been  deleted  and will not be

       -V     Write the library version number to  the  standard  output,  and

       -v     Run in verbose mode, listing the checkpoints in the log files as
              they are reviewed.

       Log cursor handles (returned by the DB_ENV->log_cursor method) may have
       open file descriptors for log files in the database environment.  Also,
       the  Berkeley  DB  interfaces  to  the  database  environment   logging
       subsystem (for example, DB_ENV->log_put and DB_TXN->abort) may allocate
       log cursors and have open file descriptors for log files as  well.   On
       operating  systems  where filesystem related system calls (for example,
       rename and unlink on Windows/NT) can fail if a process has an open file
       descriptor  for the affected file, attempting to move or remove the log
       files listed by db4.8_archive may fail.  All Berkeley DB  internal  use
       of  log  cursors  operates on active log files only and furthermore, is
       short-lived in nature.  So, an application seeing such a failure should
       be  restructured  to  close  any  open  log  cursors  it  may have, and
       otherwise to retry the operation  until  it  succeeds.   (Although  the
       latter is not likely to be necessary; it is hard to imagine a reason to
       move or rename a log file in which transactions  are  being  logged  or

       The  db4.8_archive utility uses a Berkeley DB environment (as described
       for the -h option, the environment variable  DB_HOME,  or  because  the
       utility  was  run in a directory containing a Berkeley DB environment).
       In order to avoid environment  corruption  when  using  a  Berkeley  DB
       environment,  db4.8_archive should always be given the chance to detach
       from the environment and exit gracefully.  To  cause  db4.8_archive  to
       release  all  environment  resources  and  exit  cleanly,  send  it  an
       interrupt signal (SIGINT).

       The DB_ENV->log_archive method is the underlying  method  used  by  the
       db4.8_archive  utility.   See the db4.8_archive utility source code for
       an example of using  DB_ENV->log_archive  in  a  IEEE/ANSI  Std  1003.1
       (POSIX) environment.

       The  db4.8_archive  utility  exits  0  on  success,  and >0 if an error


              If the -h option is not specified and the  environment  variable
              DB_HOME  is set, it is used as the path of the database home, as
              described in DB_ENV->open.


       Sleepycat Software, Inc. This manual page was created based on the HTML
       documentation   for  db_archive  from  Sleepycat,  by  Thijs  Kinkhorst
       <>, for the  Debian  system  (but  may  be  used  by

                                28 January 2005