Dropbox, Inc.

Akos Albert

Thomas Kleinpeter

Aaron Staley

Aaron Passey

Braden Walker

Nils Milton Bunger

Tony Xu

Sam Jau

Conor Woods

Helen Lu

Neil Burke

Adrian Ziegler-Millard

Michael Coopersmith

Panashe Fundira

The present technology is a cache that provides an implied guarantee that data returned in response to a query is current. The cache uses two techniques together to guarantee that data returned in response to a query from the cache is current. The first technique is a guaranteed clock value. The is a clock value for which all changes that have occurred before it have been written to the authoritative database. Any query having a clock value greater than the guaranteed clock value is invalid. The second technique is a data invalidation technique, where the cache repeatedly polls the authoritative database for information about changes and invalidates objects associated with changes. If no change has happened, the cache can confidently conclude it is up to date since the cache knows that it is aware of all changes as of the guaranteed clock value.

Cache with guarantee of current data

The disclosed technology addresses the need in the art for a content management system that can be highly flexible to the needs of its subjects. The present technology permits any object to be shared by providing a robust and flexible access control list mechanism. The present technology utilizes a data structure that is highly efficient that both minimizes the amount of information that needs to be written into any database, but also allows for fast reads and writes of information from authoritative tables that are a source of truth for the content management system, while allowing for maintenance of indexes containing more refined data that allow for efficient retrieval of certain information that would normally need to be calculated when it is needed.

Aggregates index

Data model and data service for content management system

Evaluating an access control list from permission statements

Determining access changes

Evaluating access based on group membership

The present technology pertains to a organization directory hosted by a synchronized content management system. The corporate directory can provide access to user accounts for all members of the organization to all content items in the organization directory on the respective file systems of the members' client devices. Members can reach any content item at the same path as other members relative to the organization directory root on their respective client device. In some embodiments novel access permissions are granted to maintain path consistency.

Synchronized organization directory with team member folders

Prevention of loss of unsynchronized content

The present technology pertains to an organization directory hosted by a synchronized content management system. The corporate directory can provide access to user accounts for all members of the organization to all content items in the organization directory on the respective file systems of the members' client devices. Members can reach any content item at the same path as other members relative to the organization directory root on their respective client device. In some embodiments novel access permissions are granted to maintain path consistency.

Cursor with last observed access state

Transition to an organization directory

File system authentication

Growing community of inventors

San Francisco, CA, United States of America

Akos Albert