•Recovery

Recovery can be either at the individual data set level or to physically restore a full volume. This is applicable for both SMS and non-SMS managed data sets.

Note that full exploitation of this component requires the use of the DSS and Optimizer components of DFSMS.

4.3.4 DFSMSrmm

The Removable Media Manager (RMM)5 component provides facilities for tape and cartridge formats, including library, shelf, volume and data set level management.

Tapes are an effective media for storing many types of data, especially backup and archive copies of disk data sets. However, tapes must be mounted to be used, and the capacity of tapes is often not fully used. DFSMS/MVS can be used to assist in more effective use of tape resources.

With SMS, a group of disks can be defined to act as a buffer for tape drives, and allow HSM to manage writing the tape volumes and data sets on those volumes. DFSMS/MVS permits the use of system managed tape volumes, and RMM can be used to manage the inventory of system managed and non system managed tapes.

For further information on this topic, see the DFSMS/MVS V1R4 DFSMSrmm

Guide and Reference, SC26-4931-05.

4.3.5 DFSMSopt

The Optimizer (OPT) component is one of the supporting products of DFSMS/MVS, and is a separately orderable feature. It provides data analysis and simulation information, which assists in improving storage usage and reducing storage costs. It can be used to:

Monitor and tune HSM functions.

Create and maintain a historical database of system and data activity.

Perform analysis of Management Class, and Storage Class policies, including simulation, costing analysis, and recommendations for data placement.

Identify high I/O activity data sets, and offer recommendations for data placement.

Monitor storage hardware performance of subsystems and volumes, including I/O rate, response time, and caching statistics.

Fine tune the SMS configuration, by presenting information to help understand how current SMS practices and procedures are affecting the way data is managed.

5Other Vendor products exist which have similar capabilities, and can be used in place of RMM, although this may restrict full exploitation of ISMF.

System Managed Storage Concepts and Components 31

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IBM 5695-DF1, 5655-DB2 manual DFSMSrmm, DFSMSopt
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5695-DF1, 5655-DB2 specifications

IBM 5655-DB2 and 5695-DF1 are significant components within the IBM software ecosystem, predominantly focusing on data management and integration solutions. These offerings cater primarily to enterprise environments that require robust database management systems and associated frameworks to maintain and manipulate data efficiently.

IBM 5655-DB2 is a well-known relational database management system (RDBMS) that excels in managing large volumes of structured data. Its architecture is designed to support high availability, scalability, and performance, crucial for businesses operating in today’s data-driven world. Some of its main features include advanced indexing capabilities, support for complex queries, and dynamic workload management. Additionally, it provides strong concurrency controls, which enable multiple users to access and manipulate data simultaneously without compromising data integrity.

One of the key characteristics of DB2 is its support for various data types, including JSON and XML, making it versatile for modern applications that generate data in diverse formats. It also features robust security mechanisms to protect sensitive data, aligning with compliance standards across industries. Integration with analytics tools further allows businesses to derive insights from their data, enhancing decision-making processes.

On the other hand, IBM 5695-DF1, also known as the InfoSphere DataStage, is a powerful data integration tool that facilitates the extraction, transformation, and loading (ETL) of data from various sources to target systems. It empowers organizations to streamline their data flows, ensuring that clean, consistent information is available for analysis and operational use. Key features of 5695-DF1 include a user-friendly graphical interface that enhances developer productivity and a rich set of connectors for numerous data sources, enabling seamless data integration.

DataStage also supports real-time data integration, allowing businesses to keep their data synchronized across multiple platforms. Its parallel processing capabilities dedicatedly optimize performance, enabling organizations to handle vast datasets efficiently. It incorporates data quality tools that help in validating and cleansing data before it is used for decision-making processes.

Both IBM 5655-DB2 and 5695-DF1 are part of a broader strategy to accommodate the evolving landscape of data management. Businesses leverage these technologies to enhance their data architectures, fostering agility and competitive advantage in their respective markets. Their integration capabilities, along with a focus on security and scalability, position them as vital assets in modern enterprise environments. Whether managing critical data within a database or ensuring seamless data flow across systems, these IBM offerings provide a comprehensive approach to handling complex data challenges.
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