DB2 High Availability features
High availability is about ensuring that a database system or other critical server functions remain operational both during planned or unplanned outages, such as maintenance operations, or hardware or network failures. Reduced database down-time enables you to meet strict Service Level Agreements (SLAs) with no loss of data during infrastructure failures.
With IBM DB2, it is possible to implement highly available and continuously available database applications.
DB2 high availability disaster recovery (HADR) feature provides a high availability solution for both partial and complete site failures. HADR protects against data loss by replicating data changes from a source or the primary server, to one or more standby servers. DB2 HADR supports up to three remote standby servers and is available in all DB2 editions excluding DB2 Express-C.
Designed for organizations that run online transaction processing (OLTP) applications on distributed systems, IBM® DB2® pureScale® feature offers clustering technology that helps deliver continuous availability and exceptional scalability transparent to applications. Automatic load balancing across all active members means your application remains available even if a node is down.
Bring it all together
In the event of unplanned downtime, pureScale and HADR are designed to failover in seconds 1. HADR can also help disaster recover of pureScale uclusters over distance of 1000s km 1. Together, DB2 HADR and pureScale reduce the risks of unplanned outages to help meeting your SLA requirements.
Furthermore, you can reduce complexity and accelerate the deployment of DB2 HADR and pureScale with IBM PureData™ System for Transactions, which is an expert integrated system combining software, servers, storage and networking designed to accelerate deployments, simplify management and help ensure business continuity.
1 Based on IBM design for normal operation under typical workload using DB2 10.5 HADR and pureScale clusters. Individual results will vary depending on individual workloads, configurations and conditions, network availability and bandwidth.