db5.3_checkpoint(1) - phpMan

DB5.3_CHECKPOINT(1)                  General Commands Manual                  DB5.3_CHECKPOINT(1)

NAME
       db5.3_checkpoint - Periodically checkpoint transactions

SYNOPSIS
       db5.3_checkpoint [-1Vv] [-h home] [-k kbytes] [-L file] [-P password] [-p min]

DESCRIPTION
       The db5.3_checkpoint utility is a daemon process that monitors the database log, and peri-
       odically calls DB_ENV->txn_checkpoint to checkpoint it.

OPTIONS
       -1     Checkpoint the log once, regardless of whether or not there has been activity since
              the last checkpoint and then exit.

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

       -k     Checkpoint the database at least as often as every kbytes of log file are written.

       -L     Log the execution of the db5.3_checkpoint utility to the specified file in the fol-
              lowing  format,  where  ### is the process ID, and the date is the time the utility
              was started.

       db_checkpoint: ### Wed Jun 15 01:23:45 EDT 1995

               This file will be removed if the db5.3_checkpoint utility exits gracefully.

       -P      Specify an environment password.  Although Berkeley DB utilities  overwrite  pass-
               word  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 utili-
               ties are not able to overwrite the memory containing the command-line arguments.

       -p      Checkpoint  the database at least every min minutes if there has been any activity
               since the last checkpoint.

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

       -v      Write the time of each checkpoint attempt to the standard output.

       At least one of the -1, -k, and -p options must be specified.

       The db5.3_checkpoint utility uses a Berkeley DB environment (as described for the  -h  op-
       tion, the environment variable DB_HOME, or because the utility was run in a directory con-
       taining a Berkeley DB environment).  In order to avoid environment corruption when using a
       Berkeley DB environment, db5.3_checkpoint should always be given the chance to detach from
       the environment and exit gracefully.  To cause db5.3_checkpoint to release all environment
       resources and exit cleanly, send it an interrupt signal (SIGINT).

       The  db5.3_checkpoint utility does not attempt to create the Berkeley DB shared memory re-
       gions if they do not already exist.  The application that creates  the  region  should  be
       started  first,  and  once  the  region is created, the db5.3_checkpoint utility should be
       started.

       The DB_ENV->txn_checkpoint method is the underlying method used  by  the  db5.3_checkpoint
       utility.   See   the   db_checkpoint   utility   source  code  for  an  example  of  using
       DB_ENV->txn_checkpoint in a IEEE/ANSI Std 1003.1 (POSIX) environment.

       The db5.3_checkpoint utility exits 0 on success, and >0 if an error occurs.

ENVIRONMENT
       DB_HOME
              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.

AUTHORS
       Sleepycat  Software, Inc. This manual page was created based on the HTML documentation for
       db_checkpoint from Sleepycat, by Thijs Kinkhorst  <thijs AT kinkhorst.com>,  for  the  Debian
       system (but may be used by others).

                                         28 January 2005                      DB5.3_CHECKPOINT(1)

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