Use a redundant architecture to back up Unwired Platform production deployments with multiple secondary resources to create a fault-tolerant environment using clusters on a server or data tier.
- Hot standby is a method of redundancy in which the primary and secondary server nodes run simultaneously. The data tier is also mirrored to the secondary server in real time, so both systems contain identical information. This is the least expensive redundant architecture; however, Unwired Platform does not support it.
- A simple 3-node cluster is an entry-level redundant architecture used by production deployments.
- An optimal N+2 cluster is the Sybase-recommended production architecture.
- Virtualization allows you to manage system
infrastructure on virtual machines. Virtualization allows platform components to run in isolation, but side-by-side on the same physical machine (typically a 64-bit processor with virtual symmetric multiprocessing). Virtualization, while supported in Unwired Platform deployments, is beyond scope of this document.