The benefits of a DSSI VAXcluster configuration:
• VAXcluster features such as shared data across systems and satellite nodes.
• Higher system availability — If one of the systems is unavailable due to a
system malfunction, the satellites booted through it can continue operating
through the other system.
If one system fails, all satellite nodes booted through that system lose connections
to the system disk. But each satellite knows that the system disk is available
through a second path. So the satellite nodes establish a new connection through
the other system and continue operation.
To increase system availability, a second system disk can be added to each boot
node. If one system disk fails, the other system disk continues to serve one
system and the satellite nodes booted through it. As in any VAXcluster, a second
system disk improves availability but increases system management tasks.
DSSI VAXcluster configurations must be installed by a Digital service
representative or licensed self-maintenance customer.
1–32 System Overview
