Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide

2-18 Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide
Compaq Confidential – Need to Know Required
Writer: John Blackburn Project: Compaq Parallel Database Cluster Model PDC/O1000 for Oracle8i and Windows 2000 Administrator Guide
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Part Number: 225083-002 File Name: c-ch2 Cluster Architecture.doc Last Saved On: 6/11/01 11:20 AM
Using Multiple Non-Redundant Fibre Channel
Arbitrated Loops
The PDC/O1000 supports the use of multiple non-redundant FC-ALs within
the same cluster. Physically, this means that within each cluster node, multiple
Fibre Host Adapters are used to connect the nodes to different sets of
RA4000/RA4100 Arrays.
NOTE: The PDC/O1000 supports the mixing of non-redundant FC-ALs and non-redundant
Fibre Channel Fabrics in the same cluster.
You would install additional non-redundant FC-ALs in a PDC/O1000
cluster to:
■ Increase the amount of shared storage available to the cluster’s servers
when the Storage Hub or FC-AL Switch in your first FC-AL is filled to
capacity. With just one FC-AL present, your shared storage resources
are restricted by the number of ports available on its Storage Hub or
FC-AL Switch.
■ Increase the PDC/O1000 cluster’s I/O performance.
Adding a second non-redundant FC-AL to the PDC/O1000 involves
duplicating the hardware components used in the first FC-AL.
The maximum number of non-redundant FC-ALs you can install in a
PDC/O1000 is restricted by the number of Fibre Host Adapters your
Compaq ProLiant servers support. Refer to the Compaq ProLiant server
documentation for this information.