The nis_cachemgr command starts the NIS+ cache manager program, which should run on all NIS+ clients. The cache manager maintains a cache of location information about the NIS+ servers that support the most frequently used directories in the namespace, including transport addresses, authentication information, and a time-to-live value.
The cache manager makes requests as a client workstation. Make sure the client workstation has the proper credentials, or instead of improving performance, the cache manager will degrade it.
To start the cache manager, enter the nis_cachemgr command (with or without the -i option):
client% nis_cachemgr client% nis_cachemgr -i
Without the -i option, the cache manager is restarted but it retains the information in the /var/nis/NIS_SHARED_DIRCACHE file. The information in the cold-start file is simply appended to the existing information in the file. The -i option clears the cache file and re-initializes it from the contents of the client's cold-start file.