Hp XP20000XP24000 Disk Array Manual de usuario descargar pdf (Pagina 156)

6-2 Performing File Access Library (FAL) Operations

Hitachi USP V Cross-OS File Exchange User’s Guide

FAL Requirements

The FAL functions have the same dataset requirements as FCU (e.g., SAM,

standard R0 track format). The FAL also has the following additional

requirements:

• The FAL functions support only standard MVS™ VTOC. The FAL functions

cannot access MVS™ datasets managed by an index VTOC and cannot access

VSE datasets when called from user applications.

• The FAL functions are not “thread-safe.” The FAL functions may not operate

properly when used by multiple threads within a single process.

• The FAL functions cannot be used by a “signal handler.” If this accidentally

happens and memory space is occupied, use kill to cancel the processes, and

use ipcrm to delete the shared memory areas that have KEY=0 (refer to OS

manuals). Do not issue the following signals to an FAL/FCU process (UNIX

only):

SIGUSR1, SIGUSR2, SIGILL, SIGTRAP, SIGIOT, SIGABRT, SIGEMT,

SIGFPE, SIGKILL, SIGBUS, SIGSEGV, SIGSYS, SIGALRM, SIGPOLL, SIGIO,

SIGSTOP, SIGTSTP, SIGCONT, SIGTTIN, SIGTTOU, SIGVTALRM, SIGPROF,

SIGXCPU, SIGXFSZ, SIGWAITING, SIGLWP, SIGFREEZE, SIGTHAW,

SIGCANCEL

• The following terminology is reserved for the FAL functions and cannot be

used in function names, variable names, or constant symbols in the user

application:

– Words that begin with dataset or fast_

– GetVolSers

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Hp XP20000XP24000 Disk Array Manual de usuario Pagina 156