/sys$common/syshlp/helplib.hlb SET, FILE, /BI_JOURNAL, Keywords  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Four keywords are used as optional parameters to the SET FILE/BI_
    JOURNAL command: ALLOCATION, [NO]CREATE, EXTENSION, and
    FILE. You can use any, all, or none of these keywords.

    Use an equal sign (=)  immediately after the SET FILE/BI_JOURNAL
    command to use a keyword. If you use more than one of the
    keywords, enclose the list in parentheses and separate the items
    in the list with commas.

 ALLOCATION=n

    Specifies the initial size, in blocks, of the journal. The
    ALLOCATION keyword is meaningful only when the CREATE keyword
    is also used.

    The default allocation is 0 blocks.

 CREATE

    Specifies that a new journal is to be created. If no journal
    exists, using this keyword creates a new one. If a journal (with
    the file specification given in this command) already exists,
    using this keyword creates a new version of the journal. In the
    latter instance, the data file named in this SET FILE command
    is journaled to the new journal. Any other files that are being
    journaled to the previous version of the journal will continue to
    be journaled to that previous version.

    If a journal does not already exist, be sure to use the CREATE
    keyword with the SET FILE/BI_JOURNAL command. If you do not
    specify the CREATE keyword and a journal does not exist, a
    journal is not automatically created and an error message is
    displayed.

    When you create a journal for before-image journaling, the file
    protection for the journal is determined as follows:

    o  If a version of the journal that you specify with the CREATE
       keyword already exists, then the new version of the journal
       has the same file protection and access control list (ACL) as
       the most recent version.

    o  If there is no existing journal (that is, if you are creating
       version 1 of the journal), then the file protection and
       ACL of the journal are the default file protection for the
       process that creates the journal, except that none of the four
       ownership categories (system, owner, group, world) is given
       delete access.

    If you want to use a single journal for both after-image and
    before-image journaling, do not use the CREATE keyword with both
    the /AI_JOURNAL and /BI_JOURNAL qualifiers, because that will
    create two separate journals. When you create a journal that
    will be used for more than one data file or more than one type
    of journaling (after-image or before-image), you should first
    use a SET FILE command to create the journal for a single type
    of journaling and for a single data file. After the journal is
    created, then you can use a single SET FILE command for multiple
    data files and both after-image and before-image journaling. For
    example, you might use the following sequence of commands:

    $ SET FILE/AI_JOURNAL=(FILE=JNL_DISK:,CREATE) [WEEKLY]SALES.DAT
    $ SET FILE/BI_JOURNAL=(FILE=JNL_DISK:[WEEKLY]SALES) -
    _$INVOICES.DAT,COMMISSIONS.DAT

 EXTENSION=n

    Specifies the default extension quantity, in blocks, for the
    journal. You can specify a value from 0 to 65,535.

    The EXTENSION keyword is meaningful only when you use the
    CREATE keyword. If the file is extended, the value that you
    specify is used. If you do not use the EXTENSION keyword
    when you create a journal, RMS calculates its own EXTENSION
    value for the journal.

 FILE=journal-filespec

    Specifies the journal where all before-image journal entries for
    the data file will be recorded. The default file specification
    for the journal is the file specification of the data file that
    you name, but with a file type of RMS$JOURNAL. Use the FILE
    keyword if you wish to modify this default file specification
    for the journal. If you provide a partial file specification for
    the before-image journal, any unspecified portions are taken from
    the default file specification.

    The file specification cannot include a node name, since the SET
    FILE command is not valid for network access.

    The FILE keyword is optional with the SET FILE/BI_JOURNAL
    command.

    You can use a single journal for multiple data files for before-
    image journaling, and you can also use the same journal for both
    before-image and after-image journaling.