Virtual machine base image upgrade based on virtual machine updates
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United States of America Patent
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Jun 11, 2019
Grant Date -
Jan 11, 2018
app pub date -
Jul 8, 2016
filing date -
Jul 8, 2016
priority date (Note) -
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Abstract
A method for de-duplicating updates in virtual machines (VMs) is provided that may be executed on a host computer u a hypervisor. Client VMs are derived from a base image, and the method includes: creating a temporary virtual machine, updating the temporary virtual machine, identifying modified blocks of the updated temporary virtual machine, and identifying files associated with the modified blocks. Moreover, the method includes determining block identifiers of matching files of a VM corresponding to identified files of the updated temporary VM, moving block content of blocks relating to the determined block identifiers from its initial location to a free location within the client VM if the block content and the matching files are not identical in the client virtual machine and the temporary VM, and de-duplicating content within the client VM, generating a complete bootable image, and replacing the base image by the temporary VM.
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