The sun4_Solaris and alpha_OSF1 implementations of HDS
currently provide a choice between the use of file mapping to perform
I/O operations on primitive objects and the use of direct read/write
operations. This is selectable via the `MAP' tuning parameter (see
§). The default is to use file mapping on
both systems.
Only read/write operations will be supported on other systems, regardless of the setting of the `MAP' tuning parameter.
HDS Hierarchical Data System