Red Hat, Inc.

Patrick Joseph Donnelly

Jeffrey Thomas Layton

Ramana Krisna Venkatesh Raja

Varsha Rao

Zheng Yan

Gregory Allan Farnum

Sidharth Anupkrishnan

Jeffrey Layton

Metadata including an encrypted file name can be attached to a directory entry for a file. For example, a method may include a processing device performing operations. The operations may include receiving, from a client system, a request to generate a directory entry in a distributed file system for a file. The operations may include generating the directory entry in a storage node of the plurality of storage nodes. The directory entry may include a file name and an index number. The operations may include encrypting the file name to generate an encrypted file name. The operations may include attaching the encrypted file name to the directory entry as metadata, the metadata being distinct from the file name and the index number. The metadata may be usable by the client system for decrypting the encrypted file name.

Encrypted file name metadata in a distributed file system directory entry

Systems and method for improved creation and management of distributed file systems are provided. In one embodiment, a method is provided that includes creating a plurality of containers within a cloud computing environment and executing, within the plurality of containers, a plurality of gateways for a distributed file system. Exports of the distributed file system may be assigned to a subset of the plurality of gateways. The exports may correspond to an exclusive subset of the distributed file system. The method may also include responding to requests to access exports of the distributed file system using containers executing gateways assigned to corresponding exports of the distributed file system.

Containerized gateways and exports for distributed file systems

Methods and systems for improved pinning of file system subtrees are provided. In one aspect, a method is provided that includes receiving an identifier of a base directory within a file system tree. A plurality of subnodes of the base directory may be identified within the file system tree. At least a subset of the subnodes may be temporarily pinned to a plurality of metadata servers (MDSs). Pinning each respective subnode of the at least a subset of subnodes may include hashing an identifier of the respective subnode to generate a hashed value corresponding to a particular MDS and assigning the particular MDS to store and manage metadata for a subdirectory associated with the respective subnode.

Automated pinning of file system subtrees

A system includes a plurality of clustered servers, a plurality of clients communicating with the plurality of clustered servers, and a grace database. Each of the plurality of clustered servers maintains a respective client recovery list. A client of the plurality of clients is configured to send a reclaim request to a server of the plurality of clustered servers. The grace database is configured to maintain an epoch value and a reclaim value. The epoch value indicates the current epoch, and the reclaim value indicates from which epoch reclaim is allowed. The server of the plurality of clustered servers is configured to maintain a client list and receive the reclaim request from the client. The client list indicates each client currently holding state on the server.

Clustered network file system server reclaim via decentralized, coordinated grace period

The technology disclosed herein that may enable a client of a distributed storage system to recover a storage session after a failure occurs. An example method may include: identifying a storage session of a distributed storage service, the storage session comprising session data that corresponds to a storage object of the distributed storage service; providing, by a processing device of a client, an indication that the client is recovering the storage session; and obtaining, by the client, the session data of the storage session from one or more devices that accessed the storage object of the distributed storage service.

Growing community of inventors

Sacramento, CA, United States of America

Patrick Joseph Donnelly