Table 17. Examples of SMS Class Usage for DB2 User Databases

Databases

Performance

Availability

Migration

Storage

 

 

 

 

Group

 

 

 

 

 

Online Production

Avg

Avg

NO

SGDB20

 

 

 

 

 

Online Production

High

Avg

NO

SGDBFAST

 

 

 

 

 

Online Production

High

High

NO

SGDBCRIT

 

 

 

 

 

Batch Production

Low

Low

YES

SGDB21

 

 

 

 

 

Batch Production

Good

Avg

NO

SGDB20

 

 

 

 

 

Batch Production

High

High

NO

SGDBCRIT

 

 

 

 

 

Data Warehouse

Low

Avg

YES

SGDB21

 

 

 

 

 

Data Warehouse

High

Good

NO

SGDBFAST

 

 

 

 

 

Development

Low

Low

YES

SGDB22

 

 

 

 

 

Test

Low

Low

YES

SGDBTEST

 

 

 

 

 

6.3 DB2 System Databases

A DB2 subsystem stores data about itself within a set of tables stored in table spaces in system databases. The system databases are:

Catalog database (DSNDB06)

Directory database (DSNDB01)

Work database (user defined name or DSNDB07)

DB2 supports a Default database (DSNDB04), which is used when the database is omitted in a table space or index space creation. The Default database can be considered a user database and may be handled in the same way as other user databases. It is not considered in this section.

The system databases have the same data organization, data type and naming convention as user databases. The system databases have stricter availability requirements. The examples of SMS classes in Chapter 6.1, “SMS Examples for DB2 Databases” on page 47 are applicable to DB2 system databases.

6.3.1 Catalog and Directory Databases

The DB2 Catalog and Directory databases contain data definitions, recovery information, security information for the data managed by DB2. If these databases become unavailable, business data is also unavailable. Recovering these table spaces is a lengthy and complex process.

To ensure that the availability requirement of the production databases is met, even in case of an outage of a DB2 system database, the DB2 Catalog and Directory databases must have an availability requirement at least as stringent as those of the production database with the highest availability requirement. Corollary: continuous availability of the DB2 Catalog and Directory is required in order to have continuous availability for a DB2 application.

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IBM 5655-DB2, 5695-DF1 manual DB2 System Databases, Catalog and Directory Databases

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.