IBM Z9, Руководство по планированию

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PR/SM Shared Partitions
PR/SM configurations supporting multiple partitions, all sharing CPs, support
concurrent CP upgrades. PR/SM code, once signaled that one or more central
processors have been made available to the configuration, will vary them online
automatically into the “shared pool” of physical CPs and begin full utilization of the
added capacity. In the following example, three partitions sharing eight physical CPs
are able to share the increased capacity resulting from a nondisruptive upgrade to a
9-way server without any other configuration changes. In the second upgrade
scenario, Partition 1 is additionally changed from a 4-way to a 5-way partition
nondisruptively. The preparation for this is straightforward and easy. Simply define
and activate logical Partition 1 with four initial and one reserved logical CPs (see
Figure 3-20 on page 3-63 for a similar example). At the time of the concurrent CP
upgrade, the SCP operator command can be used in Partition 1 to configure a fifth
CP online to the shared partition without interruption to any logical partition.
S
A
P S
A
P
S
A
P
S
A
P S
A
P
S
A
P
Partition 1
4 - Way
Partition 1
4 - Way
Partition 1
5 - Way
Partition 2
3 - Way
Partition 2
3 - Way
Partition 2
3 - Way
Partition 3
2 - Way
Partition 3
2 - Way
Partition 3
2 - Way
Active
Reserved
Concurrent
PU Upgrade
(No IPLs)
Concurrent
PU
Upgrade
(Partition
1)
P
U
8
P
U
9
P
U
9
P
U
9
C
P
0
C
P
1
C
P
2
C
P
3
C
P
4
C
P
5
C
P
6
C
P
7
C
P
0
C
P
0
C
P
1
C
P
1
C
P
2
C
P
2
C
P
3
C
P
3
C
P
4
C
P
4
C
P
5
C
P
5
C
P
6
C
P
6
C
P
7
C
P
7
C
P
8
C
P
8
Mixed Shared and Dedicated PR/SM Partitions
As with configurations in which all PR/SM partitions share available CPs, those
shared partitions within a mixed configuration also support concurrent CP upgrade.
CPs are added, without disruption to any of the partitions, to the pool of physical
CPs shared amongst the shared CP LPs. In addition, partitions configured with
dedicated CPs in a mixed environment can add new CP capacity while both the
shared CP partitions and the dedicated CP partition run uninterrupted. To prepare
for this ability, in the following example simply define Partition 3 as a 3-way
dedicated partition with two initial logical CPs and one reserved logical CP (see
Figure 3-20 on page 3-63 for a similar example). The reserved logical CP is offline
automatically at the time of partition activation. At the time of the concurrent CP
upgrade, the SCP operator command can be used in the dedicated partition to
configure a third CP online to the dedicated partition without interruption to any
logical partition.
C
P
0
C
P
0
C
P
1
C
P
1
C
P
2
C
P
2
C
P
3
C
P
3
C
P
4
C
P
4
C
P
5
C
P
5
C
P
6
C
P
6
C
P
7
C
P
7
S
A
P S
A
P S
A
P S
A
P
Partition 1
4 - Way
Partition 1
4 - Way
Partition 2
3 - Way
Partition 2
3 - Way
Partition 3
Dedicated
2 - Way
Partition 3
Dedicated
3- Way
Active Reserved
Concurrent
PU Upgrade
(No IPLs)
P
U
8
C
P
8
P
U
9
P
U
9
Chapter 2. Planning Considerations
2-63