Home > Storage > ObjectScale and ECS > Product Documentation > Dell ECS with Commvault: Configuration and Best Practices > ECS multi-site replication
In a multi-site deployment, more than one VDC is managed as a federation and/or geo-replicated. In a geo-replicated deployment, data can be read or written from any active site within the defined replication group.
Geo-replication provides enhanced protection against site failures by having multiple copies of the data—for example, a primary copy of the data at the original site and a secondary copy of the data at a remote site/VDC. For detailed information, see the ECS Overview and Architecture White Paper.
Managing application traffic both locally and globally can provide high availability (HA) and efficient use of ECS storage resources. HA is obtained by directing application traffic to known-to-be-available local or global storage resources. Optimal efficiency can be gained by balancing application load across local storage resources. An IP load balancer is required to direct traffic to an alternate site when the primary site is unavailable by using the active/standby or fixed weighting features of the load balancer.
Note: Carefully plan to determine what data should be replicated or kept local.