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| ShaoLin HA Cluster 1.0 Installation Manual and Operations Guide | ||
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| Prev | Chapter 1. Introduction to ShaoLin HA Cluster | Next |
It is always good to understand the terminology of ShaoLin HA Cluster prior install the system.
A cluster refers to a physical host or machine that is in the cluster group.
A cluster group refers to a set of clusters which those clusters can failover or failback each other. A cluster group is identified by a cluster key.
A cluster key is a randomly generated number which stores in a file. A cluster group will only have a single unique cluster key for identification.
The active node refers to the host that is actively running the system. The active node is also referred as active cluster, primary server and active server.
The standby node refers to the host that performance monitoring for the active node. The standby node is also referred as standby cluster, secondary server and backup server.
Heartbeat refers to cluster communications. It is for telling the other cluster end which the other cluster is alive or dead. It is a periodic message passing routine. See Section 1.3.2 for more information on heartbeat.
