LGM

Live Guest Migration.

Observation: Block migration is not officially supported on KVM for z Systems 1.1.1.5, but it does work…, watch out for future releases.

Objectives:

  • Load Balance between KVM Hosts
  • KVM Host Maintenance

Boundary conditions:

  • The disk containing the guest's file system must be accessible on both Logical Partitions
  • Both KVM hosts must have the network devices to allow the guest to communicate

Exceptions:

  • Possible Cenarios:

  • LPARs on the same CEC

  • LPARs on different CECs
  • ECKD not shared
  • SCSI with or without NPIV
  • MacVTAP
  • Open vSwitch

Total of combinations: ;-)

[root@kvm1awb var]# virsh pool-define-as sles_images --type dir --target /var/migration/sles
Pool sles_images defined

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