Microsoft Technology Licensing, LLC

Naresh Bade

Amit Mittal

Mehul Vora

Sangeeth Kumar

Devendra Jaripiti

Aditya Kumar Jha

Phani Prakash Boppana

A base caching disk and associated methods for facilitating fast instantiation of virtual machines in distributed computing systems are disclosed herein. In one embodiment, a method includes during an instantiation process of a virtual machine on a node in the distributed computing system, determining whether a base caching disk on the node contains a block of data of the image needed for the instantiation process of the virtual machine. The method can also include, in response to determining that the base caching disk does not contain the block of data, retrieving the block of data from the central image store without retrieving the entire image, writing the retrieved block of data to a sector on the base caching disk at the node and subsequently, marking the sector containing the written block of data on the base caching disk as read-only.

Fast instantiation of virtual machines in distributed computing systems

A system may include a cloud-based virtual machine connected to multiple virtual hard drives and associated with a guest of a first datacenter. A recovery management server may, substantially simultaneously for each virtual hard drive, create an Infrastructure-as-a-Service snapshot of data on the virtual hard drive without utilizing an agent of the virtual machine. The recovery management server may also directly replicate the snapshot of data for each virtual hard drive at a second datacenter, which may be geographically remote from the first datacenter, without re-creating Input Output ('IO') operations for each virtual hard drive via a log file. Upon an indication of failure of the first datacenter, the recovery management server may arrange to have each virtual hard drive's replicated snapshot of data be consumed by a recovery service for the guest at the second datacenter.

Protection of infrastructure-as-a-service workloads in public cloud

A virtual disk and associated methods for facilitating live migration of virtual machines in distributed computing systems are disclosed herein. In one embodiment, a method includes during a live migration of a virtual machine, determining whether a destination virtual disk on a node contains a block of data corresponding to the migrated virtual machine. The method can also include, in response to determining that the destination virtual disk does not contain the block of data, retrieving the block of data from a source virtual disk of the migrated virtual machine, writing the retrieved block of data to one or more empty sectors on the destination virtual disk, and marking the one or more written to sectors containing the block of data as read-only on the destination virtual disk.

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Hyderabad Telangana, India

Naresh Bade