Table 26. Trace Requirement for the I/O Activity Reports

I/O Activity Report

DB2 Trace

Class

IFCID

 

 

 

 

Buffer Pool

Performance

4

6, 7, 8, 9, 10, 105, 107

 

 

 

 

EDM Pool

Performance

4

29, 30, 105, 107

 

 

 

 

Active Log

Performance

5

34, 35, 36, 37, 38, 39

 

 

 

 

Archive Log/BSDS

Performance

5

34, 35, 36, 37, 40, 41,

 

 

 

114, 115, 116, 119, 120

 

 

 

 

Cross Invalidation

Performance

21

105, 107, 255

 

 

 

 

BUFFER POOL

TOTALS

AET

----------------------------

-------- ---------

TOTAL I/O REQUESTS

51

0.019885

TOTAL READ I/O REQUESTS

51

0.019885

NON-PREFETCH READS

51

 

PREFETCH READS

 

 

WITHOUT I/O

0

 

WITH I/O

0

 

PAGES READ

0

 

PAGES READ / SUCC READ

0.00

 

TOTAL WRITE REQUESTS

0

 

SYNCHRONOUS WRITES

0

N/C

COUPLING FACILITY CASTOUTS

0

N/C

PAGES WRITTEN PER WRITE

0.00

 

ASYNCHRONOUS WRITES

0

N/C

COUPLING FACILITY CASTOUTS

0

N/C

PAGES WRITTEN PER WRITE

0.00

 

Figure 47. Buffer Pool Section from I/O Activity Summary Report

11.2 RMF Monitoring

From a DB2 point of view, I/O flows between disk storage and buffer pools. I/O activity can be modeled as a three-step process involving pathing from hosts to storage servers, caching of storage server, and internal activity between cache and physical disk storage. Therefore, to monitor I/O one must ask the following questions:

Which paths do I/Os use, and what is their workload?

How efficient are the storage server cache algorithms for this workload?

What is the performance, service time, and/or response time, offered by the storage server?

124Storage Management with DB2 for OS/390

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IBM 5655-DB2, 5695-DF1 manual RMF Monitoring, Buffer Pool Totals AET Total I/O Requests, Total Read I/O Requests

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.