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With Nessus Manager clustering, you can deploy and manage large numbers of agents from a single Nessus Manager instance. For Tenable.sc users with over 10,000 agents and up to 200,000 agents, you can manage your agent scans from a single Nessus Manager, rather than needing to link multiple instances of Nessus Manager to Tenable.sc.
A Nessus Manager instance with clustering enabled acts as a parent node to child nodes, each of which manage a smaller number of agents. Once a Nessus Manager instance becomes a parent node, it no longer manages agents directly. Instead, it acts as a single point of access where you can manage scan policies and schedules for all the agents across the child nodes. With clustering, you can scale your deployment size more easily than if you had to manage several different Nessus Manager instances separately.
Example scenario: Deploying 100,000 agents
You are a Tenable.sc user who wants to deploy 100,000 agents, managed by Nessus Manager.
Without clustering, you deploy 10 Nessus Manager instances, each supporting 10,000 agents. You must manually manage each Nessus Manager instance separately, such as setting agent scan policies and schedules, and updating your software versions. You must separately link each Nessus Manager instance to Tenable.sc.
With clustering, you use one Nessus Manager instance to manage 100,000 agents. You enable clustering on Nessus Manager, which turns it into a parent node, a management point for child nodes. You link 10 child nodes, each of which manages around 10,000 agents. You can either link new agents or migrate existing agents to the cluster. The child nodes receive agent scan policy, schedule, and plugin and software updates from the parent node. You link only the Nessus Manager parent node to Tenable.sc.
Parent node — The Nessus Manager instance with clustering enabled, which child nodes link to.
Child node — A Nessus instance that acts as a node that Nessus Agents connect to.
Nessus Manager cluster — A parent node, its child nodes, and associated agents.
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