FILE SYSTEM CHANGES IN OpenVMS V8.4

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ACP QIO changes– New flags defined to request/identify symlink– Naming convention consistency – „special‟ instead of „symlink‟– Need to re-compile ACP QIO program!On V8.3! INPUT: Operate on symlink, not targetMY_FIB [FIB$V_SYMLINK] = 1;! Make QIO callstatus = SYS$QIOW (..., IO$_ACCESS, ...,FIB_DESC, file_desc, ...);! OUTPUT: Did XQP operate on symlink?IF (.MY_FIB [FIB$V_SYMLINKENTRY]) THEN::On V8.4! INPUT: Operate on symlink, not targetMY_FIB [FIB$V_CHECK_SPECIAL] = 1;! Make QIO callstatus = SYS$QIOW (..., IO$_ACCESS, ...,FIB_DESC, file_desc, ...);! OUTPUT: Did XQP operate on symlink?IF (.MY_FIB [FIB$V_IS_SPECIAL]) THEN::34© Copyright 2010 Hewlett-Packard Development Company, L.P.
V8.3 Metadata limitation•No symlink indicator in directory entry− Was defined but not actually used− Indicator was only in File Header•Caused a File Header read− Two issues:• Extra overhead• False Audit Alarm•Corrected with new DIR$V_SPECIAL flag in directoryentry35© Copyright 2010 Hewlett-Packard Development Company, L.P.
Page 1: FILE SYSTEM CHANGES INOpenVMS V8.4S
Page 7 and 8: V8.4 Solution: Use new [NO]DATA key
Page 9 and 10: V8.3 Limitations and V8.4 Solutions
Page 11 and 12: V8.3 limitations and V8.4 Solutions
Page 13 and 14: V8.4: Now we can…-Free-up „oran
Page 15 and 16: 2 TB support15© Copyright 2010 Hew
Page 17 and 18: V8.4: 2TB volumes- Device drivers a
Page 19 and 20: 2 TB on older VMS version- Older VM
Page 21 and 22: SYMLINKENHANCEMENTS21© Copyright 2
Page 23 and 24: About symlinks- Symbolic link, syml
Page 25 and 26: Symlinks on OpenVMS- Available star
Page 27 and 28: Symlinks on OpenVMS27© Copyright 2
Page 29 and 30: Symlink file attributes$ dir /full
Page 31 and 32: V8.3 symlink limitations•Implemen
Page 33: Programming interface changes- No c
Page 37 and 38: V8.3 False AUDIT ALARM- Only File H
Page 39 and 40: COMPATIBILITY: V8.3, V8.4 SYMLINKSA
Page 41 and 42: RMS: SYMLINKS AS LOGICAL NAMES- Tra
Page 43 and 44: RMS: SYMLINKS WILDCARD CONTROL- In

FILE SYSTEM CHANGES IN OpenVMS V8.4

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