3.6.0 MxDB for SQL Server Installation and Administration Guide (5697-7088, December 2007)

Chapter 2: Introduction 8

Replication of Registry Keys

MxDB for SQL Server replicates the registry keys for the SQL server from

the local machine to a location on the PSFS filesystem containing the

corresponding “master” SQL databases. The replicator watches the main

SQL instance key and, if it changes, persists the key to the shared

filesystem.

If a Virtual SQL Server fails over to a backup node, that node reads the

keys from the PSFS filesystem and applies them back before starting SQL

services. On failback, after SQL services are stopped on the backup node,

the registry is returned to its original state on that node.