Dropbox, Inc.

Alexander Sosa

Braden Walker

Adam Faulkner

Ping Hu

Tanay Lathia

Preslav Le

Lihao He

Leslie Tu

Anup Chenthamarakshan

An object management system (OMS) receives a plurality of objects to be stored. The OMS identifies a subset of objects associated with a same time period and a same namespace from the plurality of objects and generates a batch object comprising the subset of objects. The OMS issues a write request to store the batch object in an object storage system (OSS) and stores, for each object in the subset of objects, a data structure comprising an identifier of the batch object and a position of the object within the batch object. Upon receiving a read request for an object, the OMS determines, based on the data structure, whether the object is stored in the OSS and issues a read request to the OSS based on the identifier of the batch object and the position of the object within the batch, if the objects is stored in the OSS.

Object management system for efficient content item management

A consistency verification system that verifies data consistency in a content item management system. The system processes a write request. The write request includes a set of preconditions, a key, and data to write in a write operation. Processing the write request includes determining that the set of conditions are met, committing the write request at a commit time, and assigning a timestamp indicating the commit time to the write request. The system verifies data consistency associated with the write request. The verifying data consistency includes sending a replay request corresponding to the write request. The system determines whether results of the replay are consistent with results of the write request. Responsive to determining whether results of the replay are consistent with results of the write request, the system outputs information describing data inconsistency.

Verifying data consistency using verifiers in a content management system for a distributed key-value database

A consistency verification system that verifies data consistency in a content item management system. The system maintains a plurality of verifiers for checking data consistency, each verifier comprising instructions for verifying consistency for a type of requests. The system may verify the original request by selecting a verifier from the plurality of verifiers based on a type of the original request. Using the selected verifier, the consistency verification system may send verification requests to the content item management system at a second timestamp that is a period of time after the original timestamp. The system may determine whether the second response is consistent with the first response. If the responses are not consistent, the system may output information describing data inconsistency. If the responses are consistent, the system may output results and perform further verifications to help ensure data accuracy.

Growing community of inventors

San Francisco, CA, United States of America

Alexander Sosa