Specify database file and member attributes

When you create a database file, database attributes are stored with the file and members. You specify attributes with database command parameters.

• Specify file name and member name (FILE and MBR) parameters
  When you create a database file, you can name the file and the member with the FILE and MBR parameters.
• Specify the physical file member control (DTAMBRS) parameter
  You can control the reading of the physical file members with the DTAMBRS parameter on the Create Logical File (CRTLF) command.
• Specify the source file and source member (SRCFILE and SRCMBR) parameters
  You can use the SRCFILE and SRCMBR parameters to specify the names of the source file and members that contain the DDS statements.
• Specify the database file type (FILETYPE) parameter
  You can specify the type of a database file with the FILETYPE parameter.
• Specify the maximum number of members allowed (MAXMBRS) parameter
  You can specify the maximum number of members that the file can hold with the MAXMBRS parameter.
• Specify where to store the data (UNIT) parameter
  The system finds a place for the file on auxiliary storage. You can specify where to store the file with the UNIT parameter.
• Specify the frequency of writing data to auxiliary storage (FRCRATIO) parameter
  You can control when database changes are written to auxiliary storage using the force write ratio (FRCRATIO) parameter on the create, change, or override database file command.
• Specify the frequency of writing the access path (FRCACCPTH) parameter
  You can specify the frequency of writing the access path with the force access path (FRCACCPTH) parameter. The FRCACCPTH parameter controls when an access path is written to auxiliary storage.
• Specify the check for record format description changes (LVLCHK) parameter
  When the file is opened, the system checks for changes to the database file definition. You can specify the check for record format description changes with the LVLCHK parameter.
• Specify the current access path maintenance (MAINT) parameter
  You can specify how access paths are maintained for closed files with the MAINT parameter.
• Specify the recover (RECOVER) parameter
  After a failure, you must rebuild changed access paths that were not forced to auxiliary storage or journaled with the RECOVER parameter.
• Specify the file sharing (SHARE) parameter
  The database system allows multiple users to access and change a file at the same time. You can specify the file sharing with the SHARE parameter.
• Specify the locked file or record wait time (WAITFILE and WAITRCD) parameters
  When you create a file, you can specify how long a program waits for either the file or a record in the file if another job has the file or record locked with the WAITFILE and WAITRCD parameters.
• Specify the public authority (AUT) parameter
  Public authority is the authority a user has to a file (or other object on the system) if the user does not have specific authority for the file or does not belong to a group with specific authority for the file. When you create a file, you can specify public authority with the AUT parameter.
• Specify the system on which the file is created (SYSTEM) parameter
  You can specify the system on which the file is to be created with the SYSTEM parameter. You can specify if the file is to be created on the local system or a remote system that supports distributed data management (DDM).
• Specify the file and member text (TEXT) parameter
  You can specify a text description for each file and member you create with the TEXT parameter. The text data is useful in describing information about your file and members.
• Specify the coded character set identifier (CCSID) parameter
  You can specify a coded character set identifier (CCSID) for physical files with the CCSID parameter. CCSID describes the encoding scheme and the character set for character type fields that are contained in a file.
• Specify the sort sequence (SRTSEQ) parameter
  You can specify the sort sequence for a physical or logical file with the SRTSEQ parameter.
• Specify the language identifier (LANGID) parameter
  You can specify the language identifier that the system uses when the SRTSEQ parameter value is *LANGIDSHR or *LANGIDUNQ.