SPARC M8-8 and SPARC M7-8 Configurations and Failover Behavior (One PDomain)
SPARC M8-8 and SPARC M7-8 Configurations and Failover
Behavior (One PDomain)
In a SPARC M8-8 or a SPARC M7-8 server that is configured with a single PDomain, there
are eight CMIOUs in the PDomain. Each CMIOU chassis has two redundant SPs. To facilitate
failover from one SP to another, one SP serves as the Active SP, and one serves as the Standby
SP. The Active SP manages system resources unless it can no longer do so, in which case the
Standby SP assumes its role.
Related Information
■
“Determine Which SP Is Managing System Activity” on page 123
■
“Change Which SP Is Managing System Activity” on page 124
■
“Oracle ILOM Paths for SPMs” on page 122
SPARC M7-16 Configurations and Failover Behavior
A SPARC M7-16 server is divided into four configurable units called DCUs. These DCUs have
four CMIOUs each. Two of the DCUs are in the top CMIOU chassis, and two are in the bottom
CMIOU chassis. You can configure DCUs into one to four PDomains.
Each CMIOU chassis also has two service processor proxies. SPP2 and SPP3 are in the top
chassis, and SPP0 and SPP1 are in the bottom chassis. These SPPs have two service processor
modules each. To achieve redundancy, each SPM (SPM0 and SPM1) on an SPP is assigned to a
different DCU. SPM0 on each SPP manages one DCU in the CMIOU chassis, while SPM1 on
each SPP manages the other DCU in the chassis.
DCU Managed CMIOUs Assigned Assigned SPM Pairs
DCU_0 CMIOU_0–CMIOU_3 /SYS/SPP0/SPM0
/SYS/SPP1/SPM0
DCU_1 CMIOU_4–CMIOU_7 /SYS/SPP0/SPM1
/SYS/SPP1/SPM1
DCU_2 CMIOU_8–CMIOU_11 /SYS/SPP2/SPM0
/SYS/SPP3/SPM0
DCU_3 CMIOU_12–CMIOU_15 /SYS/SPP2/SPM1
Understanding Server Configurations and Failover Behavior 81
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