DB2 fully integrates concurrent copy into DB2 recovery. The CONCURRENT option on the DB2 COPY utility reduces disruption and automatically manages the copies used for recovery, to ensure consistent data. This option invokes the concurrent copy function of DFSMSdss, and records the resulting image copies in the SYSCOPY table of the DB2 catalog. “Image Copy Options” on page 20 has more information about DB2 use of concurrent copy.

Concurrent copy is called through the DFSMSdss standard API. DB2 COPY with the CONCURRENT keyword calls this API for full image copies. DB2 RECOVER recognizes that type of image copy. Other callers of concurrent copy are IMS, CICS (backup while open), and DFSMShsm.

9.5.3 Virtual Concurrent Copy

Virtual concurrent copy extends the benefits of concurrent copy to users who have RVA installed with SnapShot. When the CONCURRENT keyword is specified on a DFSMSdss COPY or DUMP statement, the software can detect whether you have a 3990 storage control or an RVA. If you have an RVA, the virtual concurrent copy function is invoked. If all the criteria are met for DFSMSdss SnapShot, a DFSMSdss SnapShot will be performed in preference to a concurrent copy.

The logical completion of the point-in time copy occurs when the source data is snapped into an interim data set called the working space data set (WSDS). The physical completion occurs when the data is moved by DFSMSdss to the target tape or disk data set. Once copy is logically complete, the data can be made available for application updates. Figure 27 on page 95 explains the four steps of a virtual concurrent copy operation.

Source

1) SNAP

WSDS

2) Logical copy complete

Target

4) Physical copy complete

3) DFSMSdss data mover

Target

Figure 27. Virtual Concurrent Copy Operation Steps

When concurrent copy is already in use, it is not necessary to change the JCL to use virtual concurrent copy. As concurrent copy support is incorporated into the backup and recovery utilities of DB2, IMS, and CICS, virtual concurrent copy can take advantage of this support immediately and without any change.

9.5.4 Remote Copy

Remote copy continuously duplicates on a remote (secondary) storage server any update done on a local (primary) storage server. The objective is to provide

an application independent disaster recovery solution. The problem with

Disk Environment Overview

95

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IBM 5695-DF1, 5655-DB2 manual Virtual Concurrent Copy, Remote Copy

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.