sge_host_aliases man page
host_aliases — Sun Grid Engine host aliases file format
All Sun Grid Engine components use a hostname resolving service provided by the communication library to identify hosts via a unique hostname. The communication library itself references standard UNIX directory services such as DNS, NIS and /etc/hosts to resolve hostnames. In rare cases these standard services cannot be setup cleanly and Sun Grid Engine communication daemons running on different hosts are unable to automatically determine a unique hostname for one or all hosts which can be used on all hosts. In such situations a Sun Grid Engine host aliases file can be used to provide the communication daemons with a private and consistent hostname resolution database.
The location for the host aliases file is <sge_root>/<cell>/common/host_aliases.
For each host a single line must be provided with a blank, comma or semicolon separated list of hostname aliases. The first alias is defined to be the unique hostname which will be used by all Sun Grid Engine components using the hostname aliasing service of the communication library.
See sge_intro(1) for a full statement of rights and permissions.