While there are various data recovery solutions on the market, all of these solutions can be divided into three basic categories according to where the solution resides:
Host-based solutions and storage-based solutions
Host-based solutions are OS dependent and require an agent installed on each host -- an agent that generally has limited OS support. This limits their scalability and increases management overhead as IT must configure and manage its DR solutions per OS and not centrally at the network layer.
Storage-based data solutions are vendor-specific leading to vendor lock-in or increased management overhead as IT tries to manage more than one storage vendor. Vendor
- lock-in typically eliminates the option of using lower-cost storage media at the secondary site, which would enable a company to contain its data recovery solution costs.
Unfortunately neither of these solutions allows for remote data replication. Remote data replication is the lynch pin in a quality data recovery solution. Without remote data replication the network remains vulnerable to a single point failure. If the data storage center is destroyed or disconnected from the network then all of the data will be offline if there is no remote data replication.
Network-based solution -- remote data replication
Network based solutions live at the network level. Network based solutions replicate data at the block level providing the most efficient data replication thereby decreasing traffic on network links and resulting in the most up-to-the minute data copies at the secondary site. This is why remote data replication is so important when choosing a data recovery solution. Remote data replication continually backs up data to remote sites so that no single point failure will disrupt the safety of the data.
The importance of remote data replication can not be undervalued. Remote data replication should be the first you look for when solving your data disaster recovery needs.