Scenario 2: Multiple systems in the sysplex using the same release level

Figure 3 shows another SYSPLEX(YES) configuration. In this configuration, however, two or more systems are sharing the same version file system (the same release level of code). Figure 1 shows a sample BPXPRMxx for the entire sysplex (what IBM® suggests) using &SYSNAME. as a symbolic name, and Figure 2 shows a configuration where each system in the sysplex has its own BPXPRMxx. For our example, SY1 has its own BPXPRMxx and SY2 has its own BPXPRMxx.

Figure 1. Sharing file systems: one version file system and one BPXPRMxx for the entire sysplex

One BPXPRMxx member to define file systems for the entire sysplex

FILESYSTYPE
TYPE(ZFS)
ENTRYPOINT(IOEFSCM)
ASNAME(ZFS)

VERSION('REL9')
SYSPLEX(YES)

ROOT
FILESYSTEM ('OMVS.SYSPLEX.ROOT')
TYPE(ZFS) MODE(READ)

MOUNT FILESYSTEM('OMVS.USER.ZFS'
MOUNTPOINT('/u') AUTOMOVE
TYPE(ZFS) MODE(RDWR)


MOUNT FILESYSTEM('OMVS.&SYSNAME..SYSTEM.ZFS')
TYPE(ZFS) MODE(RDWR) UNMOUNT PARM('NORWSHARE') 
MOUNTPOINT('/&SYSNAME')

MOUNT
FILESYSTEM('OMVS.ROOT.ZFS')
TYPE(ZFS) MODE(READ)
MOUNTPOINT('/$VERSION')

MOUNT
FILESYSTEM('OMVS.&SYSNAME..DEV')
TYPE(ZFS) MODE(RDWR) UNMOUNT PARM('NORWSHARE')
MOUNTPOINT('/&SYSNAME/dev')

MOUNT
FILESYSTEM('OMVS.&SYSNAME..TMP')
TYPE(ZFS) MODE(RDWR) UNMOUNT PARM('NORWSHARE') 
MOUNTPOINT('/&SYSNAME/tmp')
.
.
.

Figure 2. Sharing file systems: one version file system and separate BPXPRMxx members for each system in the sysplex

BPXPRMS1 (for SY1)                                    BPXPRMS2 (for SY2)

FILESYSTYPE                                           FILESYSTYPE
TYPE(ZFS)                                             TYPE(ZFS)
ENTRYPOINT(IOEFSCM)                                   ENTRYPOINT(IOEFSCM)      
ASNAME(ZFS)                                           ASNAME(ZFS)               

VERSION('REL9')                                       VERSION('REL9')
SYSPLEX(YES)                                          SYSPLEX(YES)

ROOT                                                  ROOT
FILESYSTEM('OMVS.SYSPLEX.ROOT')                       FILESYSTEM('OMVS.SYSPLEX.ROOT')
TYPE(ZFS) MODE(READ)                                  TYPE(ZFS) MODE(READ)

MOUNT                                                 MOUNT
FILESYSTEM('OMVS.SY1.SYSTEM.ZFS')                     FILESYSTEM('OMVS.SY2.SYSTEM.ZFS')
TYPE(ZFS) MODE(RDWR) UNMOUNT PARM('NORWSHARE')        TYPE(ZFS) MODE(RDWR) UNMOUNT PARM('NORWSHARE')
MOUNTPOINT('/SY1')                                    MOUNTPOINT('/SY2')

MOUNT FILESYSTEM('OMVS.ROOT.ZFS')                     MOUNT FILESYSTEM('OMVS.ROOT.ZFS')
TYPE(ZFS) MODE(READ)                                  TYPE(ZFS) MODE(READ)
MOUNTPOINT('/$VERSION')                               MOUNTPOINT('/$VERSION')

MOUNT FILESYSTEM('OMVS.SY1.DEV')                      MOUNT FILESYSTEM('OMVS.SY2.DEV')
TYPE(ZFS) MODE(RDWR) UNMOUNT PARM('NORWSHARE')        TYPE(ZFS) MODE(RDWR) UNMOUNT PARM('NORWSHARE')
MOUNTPOINT('/SY1/dev')                                MOUNTPOINT('/SY2/dev')

MOUNT FILESYSTEM('OMVS.SY1.TMP')                      MOUNT FILESYSTEM('OMVS.SY2.TMP')
TYPE(ZFS) MODE(RDWR) UNMOUNT PARM('NORWSHARE')        TYPE(ZFS) MODE(RDWR) UNMOUNT PARM('NORWSHARE')
MOUNTPOINT('/SY1/tmp')                                MOUNTPOINT('/SY2/tmp')
.
.
.

Figure 3. Sharing file systems in a sysplex: multiple systems in a sysplex using the same release level What a multiple system in a sysplex looks like when using the same version file system

What a multiple system in a sysplex looks like when using the same version file system

In this scenario, where multiple systems in the sysplex are using the same version file system, if ls –l /bin/ is issued from either system, the user expects to see the contents of /bin. However, because /bin is a symbolic link pointing to $VERSION/bin, the symbolic link must be resolved first. $VERSION resolves to /REL9 which makes the path name /REL9/bin. The contents of this directory are displayed.