Книга: Mastering VMware® Infrastructure3

Double-Take for VMware Infrastructure

Double-Take for VMware Infrastructure

Double-Take for VMware Infrastructure provides virtual machine protection by offering replication services for virtual machine files. The Double-Take for VMware Infrastructure product installs on a single Windows server in the network environment and allows multiple virtual machines to be protected from a centralized management console.

Double-Take for VMware Infrastructure sits comfortably in the realm of products dedicated to easing the disaster recovery and business continuity for organizations with a VMware virtual infrastructure. Double-Take for VMware Infrastructure captures changes at defined intervals, keeping the target virtual disk up to date and ready for failover, recovery, and backup at any time.

When a production server outage occurs, the replicated virtual machine can be started on the target server with the latest replicated data. The virtual machine will be consistent as of the last successful replication procedure. Replication is supported between any type of storage supported by the VMware ESX Server, including direct attached SCSI, fibre channel or iSCSI SANs, and NAS/NFS.

The concept of whole virtual machine protection resonates from the idea that a replica of the entire virtual machine is created, including operating system, applications, and all relevant patches, as part of the copy process. Like some of the other products in this category, Double-Take has the advantage of being an agentless utility that understands the VMware VMotion feature and provides a centralized interface for managing the backups and restores.

No "agent" software is required on the ESX Server, or within any protected VM, so protection scenarios are easily managed and rapidly deployed. Double-Take for VMware Infrastructure needs to be installed only once, and multiple protection scenarios can be launched. This approach aggregates resource consumption by VM protection so it can be easily monitored and managed at the VMware enterprise level.

Setting up a VM protection scenario is easy with a directed step-by-step workflow that guides the user through the process. With just a few mouse clicks, and in less than a minute, a VM protection scenario can be created and deployed.

The Double-Take for VMware Infrastructure management interface leverages the logical groupings and hierarchies available in VMware VirtualCenter. This makes it possible for an administrator to easily navigate through configured virtual machines to select them for management and protection by Double-Take for VMware Infrastructure.

Double-Take for VMware Infrastructure provides options for compressing the replicated files, providing flexible trade-offs between host system resource consumption and network bandwidth usage. This product provides flexibility to configure the frequency of change replication based on either the amount of change or the time that has elapsed since the last replication window.

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