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

ManualsBrandsHP ManualsSoftwareHP-UX 11i Volume Management (LVM/VxVM) Software

Attachment A: Extended Distance Cluster for RAC

Figure A-1 illustrates a basic configuration that includes common high availability (HA) components in

SGeRAC clusters.

Figure A-1. SGeRAC and Oracle 10g RAC Redundant Configuration

UID

ESC ENTER

UID

ESC ENTER

StorageWo rks

hsv210

StorageWo rks

hsv210

hp StorageW orks

Bay 14Bay 1

300GB 15k

UID

ESC ENTER

UID

ESC ENTER

StorageWo rks

hsv210

StorageWo rks

hsv210

hp StorageW orks

Bay 14Bay 1

300GB 15k

UID

ESC EN TER

UID

ESC EN TER

StorageWorks

hsv210

StorageWorks

hsv210

hp StorageW orks

Bay 14Bay 1

300GB 15k

UID

ESC EN TER

UID

ESC EN TER

StorageWorks

hsv210

StorageWorks

hsv210

hp StorageW orks

Bay 14Bay 1

300GB 15k

SGeRAC supports Extended Distance Cluster for RAC (EDC) with CFS. The standard basic

configuration

consists of two datacenters where the servers and storage reside, and a third site

where the quorum server resides. The quorum server on a third site is required as a tie-breaker in the

event of loss of communications between the datacenters. There is redundant connectivity for both the

storage fabric and the network connections through the extended distance switching equipment. All

cluster communication traffic would flow through the cluster communication network, including

heartbeats for SGeRAC, Oracle Clusterware and RAC, and CFS/CVM.

See document “Understanding and Designing Serviceguard Disaster Tolerant Architectures, 1

Edition, December 2006” available at

http://docs.hp.com

, Select High Availability, Select Metrocluster.