Double-Take Availability workloads

Full server protection provides high availability for an entire server, including the system state, which is the server's configured operating system and applications. You identify your source, which is the server you want to protect, and your target, which is the server that will stand-in for the source in the event the source fails. Double-Take monitors the source for a failure, and if it fails, the target will stand-in for the source by rebooting and applying the source system state on the target. After the reboot, the target becomes the source.

1. The source data and system data, together a total image of the source, are mirrored and replicated to the target.
2. The target monitors the source for failure.
3. In the even the source fails, the source's system state is applied when the target is rebooted. After the reboot, the target is now the source, in both identity and with the source data.

Application protection provides high availability for Microsoft Exchange or Microsoft SQL Server. You identify your source, which is the server running the application, and your target, which is the server that will stand-in for the source in the event the source fails. Double-Take will gather information from your environment (application configuration, Active Directory, DNS, and so on) about the application being protected and automatically protect the application. Double-Take monitors the source server or the application services for a failure. If it fails, the target will stand-in for the source. End-users continue to access the application, now running on the target.

1. The configuration is sent to the target and then application data is mirrored and replicated to the target.
2. The target can monitor the application for failure.
3. The target can monitor the source for failure.

Virtual protection provides high availability to Hyper-V or ESX virtual servers. You identify your source, which is the server you want to protect. Your source can be a physical server, a virtual machine where you want to protect the data within the guest operating system, or a virtual machine where you want to protect the host-level virtual disk files (.vhd or .vhdx files). Your target is a Hyper-V or ESX server that will host a virtual machine that is a replica of the source. Double-Take monitors the source for a failure. In the event of a source failure, the replica virtual machine on the target can stand-in allowing end-users to continue accessing data and/or applications.

You can protect virtual workloads in many different configurations. See Need help getting started in the Double-Take Documentation Library for a matrix that will help you determine the best virtual protection for your environment.