production
CPCs
fails,
you
could
transfer
the
logical
paths
from
the
failing
CPC
to
the
backup
CPC
by
prohibiting
the
dynamic
connection
to
the
failed
CPC
and
allowing
the
dynamic
connection
to
the
backup
CPC.
If
a
control
unit
is
connected
to
more
than
one
Director,
it
is
necessary
to
coordinate
allocation
of
the
control
unit’s
logical
paths
across
all
of
the
Directors.
You
can
use
the
System
Automation
for
z/OS
(SA
z/OS)
to
dynamically
manage
the
Directors
and
logical
paths
by
sending
SA
z/OS
commands
to
reconfigure
one
or
more
Directors.
SA
z/OS
then
sends
the
appropriate
operating
system
Vary
Path
requests.
SA
z/OS
can
also
provide
coordination
between
operating
systems
when
logical
paths
are
removed
from
one
system
and
transferred
to
another
system
as
a
result
of
blocking
Director
ports
or
prohibiting
Director
dynamic
connections
or
communication.
3990
Cluster 1
Cluster 2
Dashed lines indicate dynamic
connections between ports that
were initially prohibited.
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
C
N
C
ESCD
Production
CPC1
Production
CPC2
Production
CPC3
Production
CPC4
Backup
CPC5
Figure
2-7.
Using
the
ESCD
to
Manage
Logical
Paths
by
Prohibiting
Dynamic
Connections
2-20
PR/SM
Planning
Guide
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