DB2 Continuous Availability with the IBM DB2 pureScale Featuretips0926

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Continuous Availability with the IBM DB2 pureScale Feature 1

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Continuous Availability with the IBM DB2 pureScale

Feature

IBM Redbooks Solution Guide

Designed for organizations that run online transaction processing (OLTP) applications, the IBM® DB2®

pureScale® Feature provides clustering technology that helps deliver high availability and exceptional

scalability that is transparent to applications. DB2 pureScale leverages the industry standard for OLTP

scalability and reliability that is set by IBM DB2 for z/OS® and its IBM Parallel Sysplex® architecture and

brings a highly scalable architecture to the distributed platform.

The DB2 pureScale Feature is available as an option on IBM DB2 Enterprise Server Edition and

Advanced Enterprise Server Edition. This IBM Redbooks Solution Guide provides an overview of the DB2

pureScale Feature, highlights its architecture, and includes a usage scenario.

Figure 1. DB2 pureScale featuring extreme capacity, application transparency, and continuous availability

Continuous Availability with the IBM DB2 pureScale Feature 2

Did you know?

DB2 pureScale is more than just a feature. It is a whole new way to look at DB2 databases. You are no

longer limited to a single host to access your data, and you are not required to partition your data so that

each host owns a partition. DB2 pureScale provides a clustered solution that uses multiple hosts to

access the same data partition, allowing for increased capacity and continuous availability.

Business value

Does your database cluster give you headaches? Is it cumbersome to add a node to your cluster? When

you lose a node, does your cluster freeze? Is it difficult to tune your system for optimal performance? If

your answer to any of these questions is

, simplify your environment with the scalable database cluster

capability of the IBM DB2 pureScale Feature.

DB2 pureScale delivers unmatched levels of database scalability and availability on UNIX or Linux

systems, and maintains application transparency:

Grow with your business.



By using DB2 pureScale, your database can continue processing through unplanned outages and

take advantage of extreme capacity for any transactional workload. Scaling your system is a matter of

connecting a host and issuing two simple commands. With DB2 pureScale, you can scale your OLTP

systems to meet the most demanding business needs and control data management costs.

Scale up transparently without complex application tuning.



As application usage grows, the databases must grow in step with application usage to ensure that

the business continues operating smoothly and without bottlenecks. DB2 pureScale does not require

administrators to perform complex tuning or update application code when scaling the database. The

flexible application workload balancing and grouping capabilities of DB2 pureScale allow multiple

servers to appear as a single database, and new hosts can be used immediately. This feature helps

to reduce deployment complexity and to cut costs.

Maintain continuous availability.



Just a few minutes of downtime for critical applications can significantly damage an organization’s

bottom line. DB2 pureScale continues operating even if host failure occurs, and it maintains data

consistency without performance degradation. Centralized locking and cache management allow the

remaining hosts in the cluster to access critical information promptly and quickly absorb the additional

workload. No incoming workloads are rejected because the cluster can automatically adjust within

seconds. During planned outages, administrators can perform rolling maintenance on individual hosts

without affecting the availability of the cluster.

Support performance with a clustering architecture that is designed for scalability.



Designed for high-use clustered servers, the DB2 pureScale architecture helps ensure that

applications do not hit a scalability wall after the workload is distributed across more than a few hosts.

It can deliver near-linear scalability and maximum throughput, helping to reduce software licensing

costs and power and cooling expenditures.

Simplify database management with streamlined installation and monitoring.



DB2 pureScale simplifies database and clustering administration. Hosts can be added to and

removed from the cluster easily so that IT staff can scale the cluster up or down quickly to meet

changing business requirements. DB2 pureScale also features a single installation process for all

software components. One bundle contains all the tools that are necessary for setup, which is

automated at installation.