LOGDYNAM


>>-+-------------------------------------------------------------------------------------+-><
   |                 .-,-----------------------.                                         |   
   |                 V                         |    .-SELECTMulti--(--ALL--)-----------. |   
   '-+-LOGDYnam-+--(---(--volser--+-------+--)-+-)--+----------------------------------+-'   
     '-LDY------'                 '-,unit-'         '-+-SELECTMulti-+--(--+-ALL---+--)-'     
                                                      '-SELM--------'     +-ANY---+          
                                                                          '-FIRST-'

LOGDYNAM requests logical processing and specifies that the volumes that contain the data sets to be processed are dynamically allocated.

volser

Specifies the volume serial number of a DASD volume to be dynamically allocated. The volume must be mounted and online. You cannot specify a nonspecific volume serial number by using an asterisk(*). You can specify up to 511 volumes with the LOGDYNAM keyword.

unit

Specifies the device type of a DASD volume to be processed. This parameter is optional.

SELECTMULTI

Specifies how DFSMSdss selects cataloged multivolume data sets. DFSMSdss accepts SELECTMULTI only when you specify logical processing with the LOGDDNAME, LOGDYNAM, or STORGRP keyword. Otherwise, DFSMSdss cannot accept the specification of SELECTMULTI.

ALL

Specifies that DFSMSdss not process a multivolume data set unless the following criteria is met:

The volume list created by the LOGINDDNAME, LOGINDYNAM, or STORGRP keyword must list all the volumes that contain a part of the data set.
The volume list created by the LOGINDDNAME, LOGINDYNAM, or STORGRP keyword must list all the volumes that contain a part of the VSAM cluster.

ALL is the default.

ANY

Specifies that DFSMSdss process a multivolume data set when the following criteria are met:

Any volume specified in the volume list that is created by the LOGINDDNAME, LOGINDYNAM, or STORGRP keyword must contain a part of the data set.
Any volume specified in the volume list that is created by the LOGINDDNAME, LOGINDYNAM, or STORGRP keyword must contain a part of the VSAM cluster.

FIRST

Specifies that DFSMSdss process a multivolume data set only when the volume list includes the volume that contains the first part of the data set. The volume list is created by the LOGINDDNAME, LOGINDYNAM, or STORGRP keyword. For VSAM data sets, the volume list must include the volume that contains the first extent of the data component for the cluster.

Notes for LOGDDNAME, LOGDYNAM and STORGRP keywords:

If the LOGDDNAME, LOGDYNAM, or STORGRP keyword is not specified, DFSMSdss selects from all data sets cataloged in the catalogs accessible through the standard search order.
If the LOGDDNAME, LOGDYNAM, or STORGRP keyword is specified, DFSMSdss still uses the standard catalog search order, but it selects data sets only from the specified volumes.
A multivolume data set that has extents on volumes is processed when you specify the SELECTMULTI keyword if the following criteria are met:
- The volumes cannot be designated on the volume list created by the LOGDDNAME, LOGDYNAM, or STORGRP keyword.
- You must specify the SELECTMULTI keyword option (ANY or FIRST) to release a multivolume data set that has extents on volumes which are not identified with the LOGDDNAME, LOGDYNAM, or STORGRP keyword.