TDMF overviewTDMF is user-initiated and controlled, and allows for full
system sharing throughout the data center. TDMF provides full access
to the data at any point during a migration operation. TDMF supports
dynamic takeover on the part of the target device, an important consideration in integrity and
completeness of data migration. TDMF is completely model- and
vendor-independent within the supported architecture. New storage subsystem technologies can be
brought into the data center with an absolute minimum of disruption.
Benefits offered TDMF offers full target and source flexibility, installs dynamically, and supports multiple system data sharing environments. Master/agent relationship TDMF is initiated as an MVS batch job on the Master system and all Agent systems. The MVS Job Control Language (JCL) for a TDMF session identifies the parameter input and the communications data set (COMMDS). The TDMF control statements identify the source volumes, the target volumes, the Master system, the attached Agent systems, and all other overrides and options. The control statements for a Remote Master job define only the systems participating at the remote site; the remote target volume serial numbers are provided by the Local Master job. The COMMDS allows all systems that are attached to the source and target volumes to communicate and monitor the health of the migration in progress. The COMMDS is also used as an event log and a repository for messages, diagnostic and performance information.Master system responsibilities Remote master system responsibilities Agent system responsibilities TDMF Agent environment, and checking compatibility with the TDMF release in addition to the following actions.