Epoch
An Epoch is a configuration number for the partition as a whole. When the configuration of the replica set changes, for example when the Primary replica changes, the operations that are replicated from the new Primary replica are said to be a new Epoch from the ones which were sent by the old Primary replica.
Properties
| Name | Type | Required |
|---|---|---|
ConfigurationVersion |
string | No |
DataLossVersion |
string | No |
ConfigurationVersion
Type: string
Required: No
The current configuration number of this Epoch. The configuration number is an increasing value that is updated whenever the configuration of this replica set changes.
DataLossVersion
Type: string
Required: No
The current data loss number of this Epoch. The data loss number property is an increasing value which is updated whenever data loss is suspected, as when loss of a quorum of replicas in the replica set that includes the Primary replica.