SET RMS DEFAULT
SET RMS_DEFAULT is a DCL command that defines default values for multiblock and multibuffer counts, network transfer sizes, prolog level, extend quantity, and the query lock option used by OpenVMS Record Management Services (RMS) for file operations. If you set the default value for either the multiblock count or the multibuffer count at 0, RMS tries to use the process default value or the system default value, in that order. If these are set at 0, RMS uses a default value of 1. Defaults are set for sequential, relative, or indexed file organizations on a process- only basis, unless a systemwide basis is requested.