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PowerScale OneFS 9.8.0.0 Web Administration Guide

ICAP servers

The number of ICAP servers that are required to support a PowerScale cluster depends on how virus scanning is configured, the amount of data a cluster processes, and the processing power of the ICAP servers.

If you intend to scan files exclusively through anti-virus scan policies, it is recommended that you have a minimum of two ICAP servers per cluster. If you intend to scan files on access, it is recommended that you have at least one ICAP server for each node in the cluster.

If you configure more than one ICAP server for a cluster, ensure that the processing power of each ICAP server is relatively equal. OneFS distributes files to the ICAP servers on a rotating basis, regardless of the processing power of the ICAP servers. If one server is more powerful than another, OneFS does not send more files to the more powerful server.

CAUTION:When files are sent from the cluster to an ICAP server, they are sent across the network in cleartext. Ensure that the path from the cluster to the ICAP server is on a trusted network. Authentication is not supported. If authentication is required between an ICAP client and ICAP server, hop-by-hop Proxy Authentication must be used.

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