Chapter
7.
Parallel
Sysplex
®
Parallel
Sysplex
Planning
This
chapter
is
intended
to
provide
guidance
to
those
customers
who
operate
in
a
Parallel
Sysplex
environment.
A
Parallel
Sysplex
typically
involves
multiple
processors
and
coupling
facilities,
shared
I/O
devices,
and
a
host
of
interconnection
possibilities.
Detailed
planning
for
a
Parallel
Sysplex
is
essential
to
meet
technical
objectives,
such
as
performance
and
high
availability,
within
the
constraints
of
a
specific
raised
floor
configuration.
Consider
using
the
zSeries
Fiber
Optic
Cabling
Service
to
plan
your
sysplex
environment.
A
list
of
tasks
the
Service
can
perform
is
provided
under
“zSeries
Fiber
Cabling
Service”
on
page
6-1
Different
technologies
for
servers,
links
and
coupling
facilities
affect
your
ability
to
configure
a
productive
sysplex.
Following
are
some
guidelines
to
help
you
better
plan
for
multiple
system
interconnection.
The
basic
premise
for
a
successful
Parallel
Sysplex
installation
is
to
centralize
the
physical
location
of
the
coupling
facilities,
and
then
position
the
sysplex
servers
around
that
center.
1.
Position
the
coupling
facilities
(or
servers
with
internal
coupling
facilities)
in
the
center
of
an
open
area
of
raised
floor
large
enough
to
accommodate
all
of
the
servers
and
other
coupling
facilities
to
which
you
want
to
connect.
Central
Coupling
Facilities
= Perforated floor tile
= Cool aisle, 1.22 meters (48 inches) wide
= Exhaust (heated air from equipment)
= 610 mm (24 in) floor tiles
Central
Coupling
Facilities
v
Use
physical
planning
information
for
each
type
of
server/coupling
facility
you
intend
to
add
to
the
Parallel
Sysplex
to
help
determine
how
much
floor
space
you
will
need.
v
Remember
to
consider
weight
distribution,
service
clearances,
power,
and
cooling
for
each
piece
of
equipment
you
want
to
include.
2.
Arrange
the
sysplex
in
two
rows,
with
the
fronts
of
servers
and
coupling
facilities
facing
each
other
(see
the
illustration
under
“Considerations
for
Multiple
System
Installations”
on
page
2-9).
Allow
a
1.22
meter
(48
inch)
aisle
width
between
the
rows.
Although
this
may
be
a
larger
aisle
than
you
have
used
before,
your
Parallel
Sysplex
will
benefit
from
the
improvement
in
cooling
that
a
wider
aisle
provides
(see
the
illustration
under
“Considerations
for
Multiple
System
Installations”
on
page
2-9).
Note:
The
system
air
flow
illustration
shows
a
minimum
aisle
width
of
941
mm
(37
in).
Although
this
width
is
adequate
for
a
congested
computer
room
floor,
it
is
the
minimum
you
should
use.
An
aisle
1.22
m
(48
in)
wide
will
Level
04a,
June
21,
2004
©
Copyright
IBM
Corp.
2002,
2004
7-1
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