VMS/OpenVMS Lock Manager for x86 Intel Linux and Windows
VX/LCKMGR is an VMS / OpenVMS compatible Lock Manager for Linux and UINIX. VX/LCKMGR uses Sector7 high speed AST backplane. Locks are granted and tested identically to OpenVMS. SYS$ENQ(W), SYS$DEQ(W), SYS$GETLKI(). VX/LCKMGR was stress tested in a production environment at 80,000 lock conversions per second on an old (1997) quadcore Opteron Sever.
All openVMS Lock manager functions are fully supported except that VX/LCKMGR will only work in a single node environment.
The Following Resource Lock Modes Are Supported
- LCK$K_PRMODE - Protected Read (share lock) .
- LCK$K_PWMODE - Protected Write (update lock).
- LCK$K_CRMODE - Concurrent Read.
- LCK$K_CWMODE - Concurrent Write.
- LCK$K_EXMODE - Exclusive (exclusive lock).
- LCK$K_NLMODE - NULL (placeholder for lock conversions).
Vx/LCKMGR Supported $ENQ/$DEQ Codes
| LCK$V_VALBLK | ||
| LCK$V_CONVERT | ||
| LCK$V_NOQUEUE | ||
| LCK$V_SYNCSTS | ||
| LCK$V_SYSTEM | ||
| LCK$V_NOQUOTA | ||
| LCK$V_CVTSYS | ||
| LCK$V_RECOVER | ||
| LCK$V_PROTECT | ||
| LCK$V_NODLCKWT | ||
| LCK$V_NODLCKBLK | ||
| LCK$V_EXPEDITE | ||
| LCK$V_QUECVT | ||
| LCK$V_BYPASS | ||
| LCK$V_NOIOLOCK8 | LCK$V_NOFORK |
Vx/LCKMGR Supported $GETLKI Codes
| LKI$C_BR_LENGTH | ||
| LKI$C_LENGTH | ||
| LKI$_BLOCKEDBY | ||
| LKI$_BLOCKEDBY_BR | ||
| LKI$_BLOCKER_BR | ||
| LKI$_BLOCKING | ||
| LKI$_BLOCKING_BR | ||
| LKI$_BRL | ||
| LKI$_CSID | ||
| LKI$_CVTCOUNT | ||
| LKI$_GRANTCOUNT | ||
| LKI$_LASTLKB | ||
| LKI$_LASTRSB | ||
| LKI$_LCKCOUNT | ||
| LKI$_LCKREFCNT | ||
| LKI$_LKID | ||
| LKI$_LOCKID | ||
| LKI$_LOCKS |
Vx/LCKMGR Valid $GETLKI Return Codes
| SS$_NORMAL | ||
| LKI$_BLOCKEDBY | ||
| LKI$_BLOCKING | ||
| LKI$_CSID | ||
| LKI$_CVTCOUNT | ||
| LKI$_GRANTCOUNT | ||
| LKI$_LCKCOUNT | ||
| LKI$_LCKREFCNT | ||
| LKI$_LKID | ||
| LKI$_LOCKID | ||
| LKI$_LOCKS | ||
| LKI$_MSTCSID | ||
| LKI$_MSTLKID | ||
| LKI$_NAMSPACE | ||
| LKI$_PARENT | ||
| LKI$_PID | ||
| LKI$_REMLKID | ||
| LKI$_RESNAM | ||
| LKI$_RSBREFCNT | ||
| LKI$_STATE | ||
| LKI$_VALBLK | ||
| LKI$_WAITCOUNT |
VX/LCKMGR Returned I/O Status Codes
| LKI$C_CONVERT | ||
| LKI$C_GRANTED | ||
| LKI$C_WAITING | ||
| LKI$C_RETRY | ||
| LKI$C_SCSWAIT | ||
| LKI$C_RSPNOTQED | ||
| LKI$C_RSPQUEUED | ||
| LKI$C_RSPGRANTD | ||
| LKI$C_RSPDOLOCL | ||
| LKI$C_RSPRESEND | ||
| LKI$C_RSBTYPE |
VX/LCKMGR has the ability to log all lock requests and to also replay them for tuning and diagnostic purposes.
VX/LCKMGR also has a real time display of all lock requests.
In the image below, The Lock Manager log is being replayed so AST's are not issued.
