Emc IP Holding Company LLC

Uber Technologies, Inc.

Deepti Chheda

Nikunj Aggarwal

Nicholas Cobb

Ashwin Neurgaonkar

Adam Noffsinger

Vincent Fong

Domenic Anthony Narducci, Iv

Osman Haque

Niraj Tolia

Vaibhav Kamra

Nathan Rosenblum

Vijay Panghal

Diwaker Gupta

Shrinand Javadekar

Domenic Anthony Narducci

A system can receive a request for a transport service from a first device. The request can include a user identifier associated with a first user of the first device, contact information associated with a second user, and a pickup location information. The system can make a determination whether a user account associated with the second user is stored in a user database using the contact information in the request. Based on the determination, the system can select a messaging protocol to transmit data to a second device associated with the contact information. The system can transmit a message corresponding to the transport service to the second device using the selected messaging protocol.

Selecting a messaging protocol for transmitting data in connection with a location-based service

Compounding file system metadata operations via buffering is disclosed. In various embodiments, an indication to send locally-stored file system operations to a remote file system metadata server is received. A dependency graph or other data structure reflecting dependencies between the locally-stored file system operations to identify a linear chain of dependent file system operations. Operations comprising the linear chain are combined into a compound file system operation. The compound file system operation is sent to the remote file system metadata server.

Compounding file system metadata operations via buffering

A snapshot is received at the MDS from a backup storage location at a point-in-time subsequent to taking the snapshot, wherein the MDS comprises a map identifying an object store location for a plurality of data objects and a queue identifying individuals of the plurality of data objects that only reside on the transient object store. Individuals of the plurality of data objects identified in the queue are located on the distributed file system. The map is updated to identify the object store location for the individuals of the plurality of data objects identified in the queue.

Disaster recovery in a distributed file system

Cancelling file system operations at a file system client of a distributed file system is disclosed. In various embodiments, an indication is received to send locally-stored file system operations to a remote file system metadata server. A dependency graph or other data structure reflecting dependencies between the locally-stored file system operations is used to identify a set of locally-stored file system operations the members of which are fully dominated by a create-delete pair of operations comprising the set. The locally-stored file system operations comprising the set are cancelled, without being sent to the remote file system metadata server.

File system operation cancellation

Techniques to eliminate redundant file system operations are disclosed. In various embodiments, an indication is received to send locally-stored file system operations to a remote file system metadata server. A set of related locally-stored file system operations is determined. Operations in the set are determined to satisfy a merger criteria and are merged into a single merged file system operation. The merged file system operation is sent to the remote file system metadata server.

Eliminating redundant file system operations

A method, article of manufacture, and apparatus for providing a site cache manager is discussed. Data objects may be read from a site cache rather than an authoritative object store. This provides performance benefits when a client reading the data has a better connection to the site cache than to the authoritative object store. The site cache manager controls the volume of stored data on the site cache to enhance performance by increasing the frequency of data object being read from or written to the site cache rather than the authoritative object store.

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San Francisco, CA, United States of America

Deepti Chheda