Double Take - Real Time Data Replication
Access to critical data and applications is a company's most valuable asset. Due to natural disaster or careless error, companies without data and applications cease productivity and infuriate customers-factors that ultimately bring a business to its knees. NSI's Double-Take provides continuous, real-time data replication -allowing complete redundancy of data-therefore, continuous access to data and applications. Double-Take replicates vital data in real-time to a backup or failover server on an attached disk or on a server located anywhere in the world-ensuring full company operation within seconds to minutes of an outage.
According to the Gartner Group, 50% of companies experiencing a major disaster will go out of business if they cannot access their data within 24 hours. The loss of even an hour's data, in many corporate Windows Server environments, may cost many (tens of) thousands of pounds. Downtime is similarly expensive resulting in lost productivity and lost business. With traditional backup alone, you run the risk of losing up to a full day's data in the event of a system failure. Even the best tape backup systems require many hours to restore a large server, and downtime can extend to days if the restore does not go smoothly. For most businesses this amount of lost data and downtime is no longer acceptable.
How does Double-Take help?
Double-Take mirrors mission critical data to another server in real time. If the first server crashes, then a second server can take over. Extremely expensive downtime is prevented. Double-Take also allows data to go off-site so your customer is covered in case the whole building gets hit with a fire, flood or electricity problem. It is also easily cost-justified after just one server failure. DoubleTake also supports server mirroring from several source servers to a single target server minimising the number of servers standing by idle.
How does Double Take work?
A small software module is installed on each source and target server. An easy-to-use client application defines which data will be replicated and where the copies will be stored. The initial mirroring operation can be performed while the source servers are active. After this simple configuration and initial mirroring are completed, operations are automatic and transparent. Only the changes made to the data set, at byte level, are replicated over to the Target server. The Target server monitors the Source server(s). In the event of a server failure the target server can assume the name(s) and IP address(es) of the failed server(s), (this is in addition to its own original name and IP address), and invokes scripts to restart applications.
To see how DoubleTake works click HERE
