Appendix D. Software Appendix
421
General Parallel File System for AIX (GPFS)
A file system managed by the GPFS LPP can only be accessed from within the
system partition. GPFS 1.3 changes the locking semantics which control access
to data and as a result requires that all nodes be at the same level. The task of
migrating one node at a time is not supported. GPFS is supported in systems
with the SP Switch or SP Switch2. To see what GPFS levels are supported by
what PSSP and AIX levels see Table D-7.
Supported Levels
Table D-7 Supported levels in relationship to AIX and PSSP supported levels
S = Supported
N = Not supported
Coexistence
GPFS 1.3 does not coexist in a system partition with nodes using earlier levels of
GPFS. It cannot coexist in a mixed system partition–it works only with PSSP 3.2
and AIX 4.3.3. However, all applications which execute on GPFS 1.1 will execute
on GPFS 1.2 and all file systems created with GPFS 1.1 can be used with GPFS
1.2 and can be upgraded to a GPFS 1.2 file system.
In GPFS Release 3, all nodes in a GPFS nodeset must be in the same partition.
A GPFS file system may only be accessed from within a single SP partition. File
systems created under older releases of GPFS may continue to be used under
GPFS 1.4.
Attention: GPFS is not supported in a system comprised of clustered
enterprise servers.
GPFS
PSSP 2.4
PSSP 3.1.1
PSSP 3.2
AIX 4.2.1
AIX 4.3.3
1.4
N
N
S
N
S
1.3
N
N
S
N
S
1.2
N
S
S
N
S
1.1
S
S
S
S
N
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