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Non-disruptive load-balancing of virtual machines between data centers

  • US 9,733,989 B1
  • Filed: 02/12/2015
  • Issued: 08/15/2017
  • Est. Priority Date: 09/30/2010
  • Status: Active Grant
First Claim
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1. A method for enabling migration of a Virtual Machine (VM) across two disperse sites by providing concurrent read and write access to a read writable logical volume at both sites, the method comprising:

  • presenting, using a virtual volume presenter, over a first network the read writable logical volume at a first site, wherein the first site has a first storage medium;

    presenting, using the virtual volume presenter, over a second network the read writable logical volume at a second disparate site, wherein the second site has a second storage medium; and

    enabling cotemporaneous read write access by a set of virtual machines to the read writable logical volume at the first site and to the read writable logical volume at the second site by the set of virtual machines to enable transparent migration of the virtual machine between the first site and the second site to enable load balancing across the first site and the second site according to at least one load balancing metric, wherein the virtual volume presenter provides an abstraction layer spanning the first site and the second site, wherein transparent migration of the virtual machine includes enabling the virtual machine to access the read writeable logical volume as the same logical drive at the first site and the second site; and

    wherein the read writable logical volume is configured to present logically consistent data at the first site and the second site using the first storage medium and the second storage medium.

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