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METHODS AND SYSTEMS FOR IMPLEMENTING TRANSCENDENT PAGE CACHING

  • US 20100186011A1
  • Filed: 03/03/2010
  • Published: 07/22/2010
  • Est. Priority Date: 01/20/2009
  • Status: Active Grant
First Claim
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1. A computer implemented method of implementing transcendent page caching, the method comprising:

  • establishing a plurality of virtual machines on a physical machine, wherein each of the plurality of virtual machines includes a private cache, and wherein a portion of each of the private caches is used to create a shared cache maintained by a hypervisor, wherein the hypervisor is configured to manage physical resources of the physical machine, divide and assign the physical resources to the plurality of virtual machines as specified by a system administrator, creates an illusion for an operating environment running in each of the plurality of virtual machines that each is running on a separate physical machine, and isolate the virtual machines from each other to ensure no one virtual machine interferes with another virtual machine;

    storing memory pages in the plurality of virtual machines'"'"' private caches;

    determining that at least one of the stored memory pages has been designated to be removed from one of the plurality of virtual machines'"'"' private caches;

    delaying the removal of the at least one of the stored memory pages;

    storing the at least one of the stored memory pages in the shared cache;

    requesting, by one of the plurality of virtual machines, the at least one of the stored memory pages from the shared cache;

    determining that the at least one of the stored memory pages is stored in the shared cache; and

    transferring the at least one of the stored shared memory pages to the one of the plurality of virtual machines.

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