Esdebe Consultancy has worked on many projects where the key requirements have been resilience, reliability and availability a few of our installations are listed below to give an example of the typical configuration.
A
local council required a highly available and resilient solution for its Social
Services databases. Esdebe Consultancy designed and implemented a solution,
which consisted of two Sun Servers, clustered together across remote sites,
with data being replicated (using mirroring over fibre) between the two sites.
The servers then used Veritas Cluster Server to monitor and manage the fail
over of the Oracle application in the event that any one or combinations of
resources were lost at the primary site.
For another client in the leisure industry we have installed Veritas Volume Manager and Veritas Volume Replicator under windows 2000 to transfer data over the WAN to a remote site. The Primary data source was a MSCS cluster running SQL, and the remote server was a Windows 2000 server.
We
have also, assisted a web housing company in checking and documenting the
configuration of a Veritas Cluster solution that they were going to be managing
on behalf of one of their clients, who no longer employed the engineers that
initially set up and configured the servers. This service also included assisting
in migrating the cluster with multiple subnets to a completely different subnet
infrastructure.
For some companies who can not afford the high costs of Veritas Cluster server we have written some monitoring and management scripts to import and deport Veritas Volume Manager disk groups between servers and start applications up on a standby server.