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From "Marcus Sorensen (JIRA)" <>
Subject [jira] [Created] (CLOUDSTACK-6203) KVM live migration improvement
Date Wed, 05 Mar 2014 19:22:43 GMT
Marcus Sorensen created CLOUDSTACK-6203:

             Summary: KVM live migration improvement
                 Key: CLOUDSTACK-6203
             Project: CloudStack
          Issue Type: Improvement
      Security Level: Public (Anyone can view this level - this is the default.)
          Components: KVM
            Reporter: Marcus Sorensen
            Assignee: Marcus Sorensen
             Fix For: 4.4.0

Run the KVM live migration in a thread so we can monitor it. This will allow us to see how
long migrations are taking and do things like pause the vm if migration is stalling (per user
defined time limit) to quickly complete migration, or set the domain's max downtime during
cut-over between machines (higher values make migration of busy vms easier, lower values may
make migration stall).  In the future we can add the autoconvergence flag that stalls VMs
for a few ticks to allow memory copy to catch up, but it will be awhile before libvirt that's
shipped in a distro supports it, so these tunables may be useful now.

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