Agent-based backup is a proven technique for safeguarding physical servers. AGENT VERSUS AGENTLESS: FACTORS TO EVALUATE Administrators appreciate its speed, consistency, and ease of administration when performing image-based backups for bare-metal server recovery or non-image-based backup for file recovery. But do these benefits transfer cost-effectively to virtualized environments? With multiple virtual machines (VMs) per server and mobile VMs that can migrate throughout a distributed environment, the costs of purchasing and managing a separate agent for each physical and virtual server can be prohibitive. Agentless backup was created to retain the benefits of agent-based backup without the expense of per-server agents. Instead of installing a backup agent on each VM, the back

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