Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide

5-12 Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide
Compaq Confidential – Need to Know Required
Writer: Carol Tatick Project: Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide Comments:
Part Number: 225082-002 File Name: f-ch5 Installation and Configuration.doc Last Saved On: 6/13/01 10:27 AM
Table 5-1 summarizes the active/active cabling methods. Select the method
that is best for your site.
Table 5-1
Active/Active Cabling Methods
Method
Active Array
Controller
Location
Advantage Disadvantage
1 Top array controller
slot
Consistency in active array
controller definition. All active
array controllers are defined to
be in the top array controller slot
in each RA4000/RA4100 Array.
Cabling is more complex
than for method 2. Some
cables from each Storage
Hub connect to the top array
controller in each
RA4000/RA4100 Array, and
some cables from each
Storage Hub or FC-AL
Switch connect to the
bottom array controller in
each RA4000/RA4100 Array.
2 Top array controller
slot in odd-
numbered
RA4000/RA4100
Arrays
Bottom array
controller slot in
even-numbered
RA4000/RA4100
Arrays
Consistency in cabling. All cables
from Storage Hub/Switch #1
connect to the top array
controller in each
RA4000/RA4100 Array. All cables
from Storage Hub/Switch #2
connect to the bottom array
controller in each
RA4000/RA4100 Array.
Defining active array
controllers is more complex
than for method 1. The
active array controller must
be defined as the top array
controller slot in some
RA4000/RA4100 Arrays and
as the bottom array
controller slot in other
RA4000/RA4100 Arrays.