- recovery
The restoration of system operation to full capacity or partial
capacity. During recovery, a system performs the following tasks:
- redundancy
The provision of a backup node to take over in the event of
failure. The Foundation Services use the 2N redundancy model.
See also availability, reliability, and serviceability.
- relative priority
The priority of one of the Foundation Services processes compared to
another. In descending order of priority, the Foundation Services daemons have the following
relative priority: nhpmd > nhwdtd > nhprobed> nhcmmd > nhcrfsd
> nhnsmd.
See also actual priority and base priority.
- reliability
The measure of continuous system uptime.
See also availability, redundancy, and serviceability.
- Reliable Boot Service
A service that uses the Dynamic Host Configuration Protocol
(DHCP) and the other Foundation Services to ensure the boot of diskless nodes regardless
of software failures or hardware failures.
- Reliable NFS
A service that provides a mounted file system to make data
on the master node accessible to other cluster nodes. Reliable NFS mirrors
disk-based data on the master node to the vice-master node, and reconfigures
the floating address triplet after failover or switchover.
- replication
The copying of data from the master node to the vice-master
node. Through replication, the vice-master node keeps an up-to-date copy of
the data on the master node.
See also synchronization.
- role
A membership role allocated by the Cluster Membership Manager.
See also in node, out node, master node, and vice-master node.