Cluster Deployment Descriptor Reference : Cluster Tab — Cache Manager — Configuration Settings

Cluster Tab — Cache Manager — Configuration Settings
For General settings see Cluster Tab — General Settings.
 
Specifies a minimum number of storage-enabled nodes (that is, a quorum) that must be active in the cluster when the system starts up before the following occur:
The property does not affect the running of the deployed application after startup (though a message is written to the log file if the number of cache servers running falls below the number specified in this property).
Starting a Minimum Number of Cache Servers
At system startup, one node in the cache cluster loads objects from the backing store to the cache cluster. Any node in the cluster can perform the preloading.
Before preloading begins, you must ensure that enough cache servers have started to hold the objects from the backing store. The cluster does not start processing incoming data until the required objects have been loaded into the cache.
See Cluster Tab — Cache Manager — Configuration Settings for details on specifying the minimum number of cache servers that must start before cache loading begins
After the specified number of servers has started, the processing unit that acquires the lock first performs the cache loading. Any processing unit can acquire the lock. All agents wait until backing store data has finished loading before they start.
This setting does not affect runtime operation of the deployed application. Deployed applications continue to run even if one or more cache servers fails and the quorum is no longer met. A warning message is written to the log file.