Linked by Robert Gezelter on Tue 18th Jul 2006 11:57 UTC
In its initial concept, OpenVMS (then VAX/VMS) sought to provide the functionality and capabilities of a mainframe-class system at a small fraction of the size and cost, while at the same time providing higher levels of reliability and integrity. These goals were achieved by what has become OpenVMS' hallmark, an
emphasis on integrity and architectural leverage. Note: This is an entry to our OS Contest.
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Member since:
2006-07-18
w-ber,
Yes, logical names can point to any point in a directory tree, for example:
$ ASSIGN DISK$USERS:[GEZELTER.KUMQUAT] DATAFILES
means that the open statement using the filename DATAFILES:JUNK.DAT will refer to a file in DISK$USERS:[GEZELTER.KUMQUAT].
As has been aluded to, you can also use the logical name facility to create something akin to *IX mount points. In the OpenVMS case, for the purposes of filename parsing, a (sub)directory appears to be the root of an entirely different directory tree. The logical name facility is more extensively discussed (with some examples) in a series of five columns available from OpenVMS.org at http://www.openvms.org/stories.php?story=02/09/24/5441505
- Bob Gezelter, http://www.rlgsc.com