Microsoft Technology Licensing, LLC

Hemant Kumar

Deepak Bansal

Parveen Kumar Patel

Xinyan Zan

Parag Sharma

Nimish Aggarwal

Dharma Kiritkumar Shukla

Karthik Raman

Momin Mahmoud Al-Ghosien

Ji Huang

Shireesh Kumar Thota

Pankaj Sharma

Arsalan Ahmad

Atul Katiyar

Ankur Savailal Shah

Shreshth Singhal

Sujit Vattathil Kuruvilla

Ovidiu Constantin Platon

Rajeev Sudhakar Bhopi

Padma Priya Aradhyula Bhavani

Junyan Guo

Venkata Sivaramakrishna Ramadugu

A distributed resource may be mapped into a virtual network, where the resource is distributed across a large number of nodes that are uniquely addressable within the distributed resource service's address space. The resource can be represented using a relatively small number of private VIP addresses within the virtual network, while still enabling access to all of the nodes that are uniquely addressable within the address space of the distributed resource service. A resource map may be created that relates the distributed resource service's address space to the virtual network's address space. The resource map may be used by a gateway that facilitates access to a distributed resource by clients. The resource map may also be used to translate packets that are sent from clients within a virtual network into the distributed resource service's address space.

Efficiently mapping a distributed resource to a virtual network

Distributed transactions are performed over a collection of servers operating as replicas of a data set, where a successful transaction involves meeting a quorum count of replicas that locally commit the transaction. However, performance constraints of data sets and consuming applications may vary (e.g., sensitivity to latency, scalability, and/or consistency), and the performance characteristics of the server set may be partly determined by the transactional commitment and quorum selection. The distributed transaction may be applied by designating the replicas as a set of followers and a leader that initiates the transaction and receives acknowledgments of local commits by each follower. On condition of the acknowledgments meeting a quorum count for the data set according to the performance characteristics of the application, the leader locally commits the transaction and delivers a result. The transaction may also be applied over collections of replica sets using a second-level quorum to achieve nested consensus.

Resource-governed protocol and runtime for distributed databases with consistency models

Redirecting message flows to bypass load balancers. A destination intermediary receives a source-side message that includes a virtual address of a load balancer as a destination, and that is augmented to include a network address of a destination machine as a destination. The destination intermediary determines that a source intermediary should address subsequent network messages that originate from a source machine and that are associated with the same multi-message flow to the destination machine while bypassing the load balancer. The destination intermediary modifies the source-side message so the destination for the source-side message addresses the destination machine, and passes the modified source-side message to the destination machine. The destination intermediary receives a response from the destination machine identifying the source machine as its destination, and modifies the response so a source address identifies the virtual address of the load balancer, and dispatches the modified response to the source machine.

Load balancer bypass

Bypassing a load balancer that initially appeared in a multi-message flow from a source machine served by a source intermediary and a target machine served on a target intermediary. One or more original network messages (and perhaps just the first) of the flow arrive from the source intermediary at the load balancer, which selects which machine is to be a destination machine, and it turns out selects the destination machine serviced by the destination intermediary. In response to receiving this message, the destination intermediary instructs the source intermediary to transmit subsequent messages in the flow in a manner that bypasses the load balancer. To facilitate this, the source intermediary may modify addressing of subsequent flow messages from the source machine such that they are rerouted to the destination machine without addressing the load balancer.

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Hemant Kumar