Supported versions and recommended number of instances for High Availability
Supported Couchbase versions
PDS supports the following Couchbase data service versions:
Data service  | Version  | 
Couchbase  | 
  | 
Recommended minimum number of instances for High Availability
| Minimum number of instances | Reason | 
|---|---|
| 3 | Couchbase’s key-value, index, and query services each require redundant instances. Three instances help distribute data and services so that any single failure does not disrupt the entire cluster. |