Data Facility Storage Management Subsystem (DFSMS™) is a software suite that automatically manages data from creation to expiration. DFSMS provides allocation control for availability and performance, backup/recovery and disaster recovery services, space management, tape management, and reporting and simulation for performance and configuration tuning.
Integrated, comprehensive data management solution
Delivers managed, predictable service to meet Service Level Agreements for Storage
Up to 50% increased effective storage capacity with reduced overall storage costs
Components
DFSMSdfp (Data Facility Product)
Provides storage, data, program, and device management functions and DFSMS Copy Services capabilities
DFSMS Copy Services—DFSMSdfp through its System Data Mover Component provides DFSMS Copy Services which include:
z/OS Global Mirror, also known as Extended Remote Copy (XRC)
Peer-to-Peer Remote Copy (PPRC) including:
Metro Mirror, also known as synchronous PPRC
Global Copy, also known as PPRC-XD
Global Mirror
3-site solutions:
Metro/Global Copy
Metro/Global Mirror (M/GM)
Metro/zGlobal Mirror (M/zGM)
FlashCopy®
Concurrent Copy
Virtual Concurrent Copy
SnapShot®
z/OS NFS(Network File System)—provides a way to optimize performance and efficiency in a distributed network while still capitalizing on the capacity, security, and integrity of zOS.
XRC Performance Monitor—The XRC Performance Monitor provides additional information to better manage an XRC environment and help XRC achieve the desired performance (typically measured as the latency in updating the mirrored system) at a low cost.
IBM TotalStorage (ETL) Expert—provides storage administrators with important, easy to access information about their Magstar 3494 Tape Libraries and Magstar Virtual Tape Servers.
DFSMSdss (Data Set Services) - An optional feature providing data movement, copy, backup, and space management functions
Concurrent Copy—Concurrent Copy (CC) is both an extended function in cached IBM Storage Controls and a component of DFSMSdss. CC enables you to copy or dump data while applications are updating the data. Both IMS/ESA and DB2 can use CC for their backups.
FlashCopy—FlashCopy provides a fast data duplication capability. This option helps eliminate the need to stop applications for extended periods of time in order to perform backups and restores. FlashCopy is automatically initiated by DFSMSdss on IBM Enterprise Storage Servers (ESS) with the FlashCopy feature.
DFSMSdss Stand-Alone Services—DFSMSdss Stand-Alone Services was previously introduced as an APAR enhancement to all releases of DFSMS. The stand-alone restore function is a single-purpose program designed to allow the system programmer to restore vital system packs during disaster recovery without needing to rely on an OS/390 or z/OS environment.
DFSMShsm (Hierarchical Storage Manager) - An optional feature providing backup, recovery, migration, and space management functions
DFSMSrmm (Removable Media Manager) - An optional feature providing management functions for removable media resources such as tape libraries, tape cartridges, physical, logical, and virtual volumes. The key functions provided by DFSMSrmm include:
Tape Data Set Recording—DFSMSrmm automatically tracks and records metadata for data written to all types of tape volumes.
Inventory Management—DFSMSrmm automatically records metadata for tape volumes used on the system, and allows you to define any tape volume, enabling your complete tape inventory be monitored and managed. DFSMSrmm supports tape volumes which are used anywhere in your enterprise, including z/VM, and those managed by IBMs Integrated Removable Media Manager for the enterprise on System z. You can easily partition your tape inventory and tape libraries and use DFSMSrmm to control which system can use the volumes.
Life Cycle Management—DFSMSrmm provides policies to enable tape data sets and tape volumes to be managed throughout their life. You define your tape data service levels, tape technology retention criteria and DFSMSrmm automatically manages the life cycle.
Scratch Pool Management—DFSMSrmm supports either a global scratch pool or you can define one or more specific scratch pools for non-system managed tape volumes. DFSMSrmm manages the selection of the pool, and the return of volumes back to the scratch pool once the tape data expires.
DFSMStvs (Transactional VSAM Services) is an optional priced feature that enables batch jobs and CICS online transactions to update shared VSAM data sets concurrently.
DFSORT - Separate complementary product that provides high performance, sorting, merging, copying, reporting, and analysis of data.
