# NServiceBus Gateway RavenDB Persistence Upgrade from 1 to 2


## Cluster-wide transactions support

NServiceBus.Gateway.RavenDB version 2 supports cluster-wide transactions. RavenDB 5.2 or greater is required for both the RavenDB client and server. Cluster-wide transaction support is disabled by default. To enable it, configure the persister as follows:

```
var ravenGatewayDeduplicationConfiguration = new RavenGatewayDeduplicationConfiguration((builder, _) =>
{
   //create and configure the RavenDB document store.
})
{
   EnableClusterWideTransactions = true
};
```

If the persister is configured to connect to a database whose replication factor is greater than one, and cluster-wide transaction are not enabled, the persister will throw the following exception:

> The configured database is replicated across multiple nodes, in order to continue, use EnableClusterWideTransactions on the gateway configuration.