Dell PowerStore Configuring Multiprotocol File Sharing

A secure mapping cache (secmap) is a cache that stores mappings of users that connected to the NAS server. For each user the SID, username, and UID are stored. secmap only stores mappings that the standard mapping mechanism generates.

Storing SID-to-UID and primary GID and UID-to-SID mappings in a local cache ensures coherency across all file systems of the NAS server.

Storing user mappings in secmap reduces network traffic and increases efficiency. When a user mapping is stored in secmap, the NAS server leverages the local cache for future mapping lookups.