own report writer and graphics display tools. Refer to Chapter 10 of IXFP Subsystem Reporting, SC26-7184, as a reference manual for any RVA monitoring and reporting facilities. Standard IXFP reports require use of a SAS statistical environment from SAS Institute, Incorporated. IBM Storage Division specialists can also provide REXX programs with some basic reporting facilities.

There may be some differences between the data produced by IXFP reports and the data produced in the IDCAMS LISTDATA output that RMF uses to edit its CACHE reports. For compatibility reasons, the RAMAC Virtual Array counts certain I/Os as noncached in response to LISTDATA. Therefore, the IXFP reports reflect actual RVA performance more accurately.

IXFP edits three standard reports that consolidate activities at two levels: on all LPARs sharing the RVA, and on all four LCUs contained in the RVA. The standard reports are:

•Device Performance

•Cache Effectiveness

•Space Utilization

The Space Utilization report provides information related to LSF management of physical disk space.The Device Performance and Cache Effectiveness reports offer a complementary view of RMF and can be used to cross-check RMF information. From a DB2 application point of view, the system summary information indicates what to look for. Other detailed information either at the functional volume level or at RVA hardware subcomponent level are beyond the scope of this chapter.

11.3.1 Device Performance Reports

Figure 54 on page 137 shows the subsystem summary of the device performance report. Four fields of this report complement the RMF view. Other information for storage specialists is related to either functional volume statistics, disk array summaries, channel interface performance, or distribution of physical drive module utilization.

The fields to review are:

•I/O PER SEC is the average number of I/O operations per second for the subsystem.

•KBYTES PER SEC is the amount of data in kilobytes transferred per second between the host and the subsystem.

•I/O SERVICE TIME components show the average service time per I/O operation in milliseconds. This service time does not include host and channel subsystem queuing times (IOSQ and Pend time) as the RMF Device Activity report shows.

•DISC is the average time the subsystem was disconnected from the channel (in milliseconds) while processing an I/O operation.

•CONNECT is the average time the subsystem was connected to the channel (in milliseconds) while processing an I/O operation. This includes data transfer time and command parameter transfer time.

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IBM 5655-DB2, 5695-DF1 manual Device Performance Reports
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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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