Specifications

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Chapter 10 Configuration for Clustering
Clustering Software in Virtual Machines
Network!Load!Balancing,!Microsoft!Clustering!Service,!and!Veritas!Clustering!Service!
run!without!modification!in!virtual!machines!on!ESX!Server!2.5.
Clustering Scenarios
Several!scenarios!are!possible!for!clustering!in!virtual!machines.
Cluster in a Box
This!scenario!provides!simple!clustering!to!deal!with!software!crashes!or!
administrative!errors.!The!cluster!consists!of!multiple!virtual!machines!on!a!single!
physical!machine.!It!supports!shared!disks!without!any!shared!SCSI!hardware.!It!
supports!heartbeat!network!without!any!extra!network!
adapters.
Figure 10-1. Two-node cluster on a single physical machine; each node running
clustering software.
Cluster Across Boxes
This!type!of!cluster!consists!of!virtual!machines!on!multiple!physical!machines.!The!
virtual!disks!are!stored!on!shared,!physical!disks,!so!all!virtual!machines!can!access!
them.!Using!this!type!of!cluster,!you!can!deal!with!the!crash!of!a!physical!machine.
Cluster
software
Cluster
software
Requests
.vmdk
Physical machine
Virtual
machine
Virtual
machine