New disaster tolerant solutions for HP NonStop servers

May 26, 2004

Two new disaster tolerant solutions—HP Metrocluster for NonStop Servers and HP Continentalclusters for NonStop Servers—are being introduced at the 2004 ITUG European Conference, June 7–9 in Madrid, Spain. These geographically dispersed NonStop clusters extend the native fault tolerance of NonStop servers to encompass disaster tolerance. Utilizing data replication software such as NonStop Remote Database Facility (RDF) and NonStop AutoSYNC, HP Metrocluster and Continentalclusters for NonStop Servers maintain multiple copies of an application and database, allowing continuous availability in the event of a local or regional outage—or even for something as simple as a system or application upgrade.

HP Metrocluster for NonStop Servers

An HP Metrocluster configuration of NonStop servers consists of two or more servers that are

1. Locally or geographically dispersed for disaster tolerance

2. Part of the same application domain

3. Linked to each other via a distance-limited technology, such as HP NonStop ServerNet (15 kilometers) or NonStop Remote Database Facility/Zero Lost Transactions (NonStop RDF/ZLT, 100 kilometers)

HP Continentalclusters for NonStop Servers

An HP Continentalclusters (note the use of the plural in the name) configuration differs from a Metrocluster configuration in that servers are linked via a technology that is not distance-limited, such as an HP Expand wide area network (WAN).

As with an HP Metrocluster configuration, HP Continentalclusters servers are locally or geographically dispersed for disaster tolerance and are part of the same application domain.

This news is published on NonStop Computing websites. May 2004.