Serviceguard Extended Distance Cluster (EDC) with VxVM/CVM Mirroring on HP-UX, May 2008

Example hardware configuration
Figure 1. Sample EDC configuration
UID
ESC ENTER
UID
ESC ENTER
HP
StorageWorks
hsv210
HP
StorageWorks
hsv210
hp StorageW orks
Bay 14Bay 1
300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k
UID
ESC ENTER
UID
ESC ENTER
HP
StorageWorks
hsv210
HP
StorageWorks
hsv210
hp StorageW orks
Bay 14Bay 1
300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k
UID
ESC EN TER
UID
ESC EN TER
HP
StorageWorks
hsv210
HP
StorageWorks
hsv210
hp StorageW orks
Bay 14Bay 1
300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k
UID
ESC EN TER
UID
ESC EN TER
HP
StorageWorks
hsv210
HP
StorageWorks
hsv210
hp StorageW orks
Bay 14Bay 1
300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k 300GB 15k
This sample configuration meets the general architectural rules:
• half of the nodes in each data center
• half of the storage in each data center
• each data center is highly available by itself
– multiple nodes if possible
– highly available storage
– redundant network and Fibre Channel configurations
• quorum service is provided by a system at an independent third location
• redundant inter-site links (network and storage) are physically routed differently
Best practice:
Routing inter-site network and storage traffic on the same physical media
ensures that heartbeat and storage access between the sites are either both
available or both unavailable.
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