Clustering System Requirements

The following are system requirements for the parent node and child nodes. These estimations assume that the KB and audit trail settings are disabled. If those settings are enabled, the size required can significantly increase.

Note: All Nessus nodes in a cluster must be on the same version. Otherwise, the cluster deployment is unsupported.

Parent Node (Nessus Manager with clustering enabled)

Note: The amount of disk space needed depends on how many agent scan results you keep and for how long. For example, if you run a single 5,000 agent scan result once per day and keep scan results for seven days, the estimated disk space used is 35 GB. The disk space required per scan result varies based on the consistency, number, and types of vulnerabilities detected.

  • Disk: Estimated minimum of 5 GB per 5000 agents per scan per day
  • CPU: 2 cores
  • RAM: 8 GB

Child Node (Nessus scanner managed by Nessus Manager parent node)

Note: Disk space is used to store agent scan results temporarily, both individual and combined, before uploading the results to the parent node.

Child node with 0-10,000 agents:

  • Disk: Estimated minimum of 5 GB per 5000 agents per concurrent scan.
  • CPU: 2 cores
  • RAM: 8 GB

Child node with 10,000-20,000 agents:

A child node can support a maximum of 20,000 agents.

  • Disk: Estimated minimum of 5 GB per 5000 agents per concurrent scan.
  • CPU: 4 cores
  • RAM: 16 GB

Agents

  • Linked agents must be on software version 7.4.0 or later.