Druva Inc.

Rohit Singh

Shubham Agarwal

Somesh Jain

Milind Vithal Borate

Saurabh Bhavsar

The present invention discloses a file storage system including an object storage for storing data blocks for a client, a merge index database to store metadata corresponding to the stored data blocks using a merge index, a cloudcache located on a premise of the client, and a cloudcache implementation module communicatively coupled to the object storage, the cloudcache and the merge index database. The cloudcache implementation module facilitates data backup and restore operations for the client in accordance with a data retention policy, where one or more data blocks are stored on the cloudcache and a sync operation is performed between the cloudcache and the object storage. A backup of the data blocks is performed to the cloudcache in a backup operation, data blocks are compacted, and a restore operation for data blocks stored on the cloudcache are performed in accordance with the data retention policy.

Cloudcache implementation for an object storage-based file system

A file system and a related method are presented. The file system includes a data storage including a plurality of data blocks; a merge index including a plurality of namespace entries, wherein the plurality of namespace entries include a plurality of blockmap entries and a plurality of local reference entries; a deduplication database including a plurality of deduplication indices and a plurality of global reference entries for a plurality of datasets; and an indexing system configured to generate the plurality of namespace entries and the plurality of global reference entries.

Data compaction systems and method

A data management system may maintain a total-size counter for the file system. The total-size counter represents a sum of data size related to snapshots backed up to the file system. The data management system may perform data operation cycles to the file system. Each data operation cycle corresponds to a snapshot that includes files. Each data operation cycle may include incrementing the total-size counter by the data size of the files in the snapshot exchanged with the file system and adding, to a snapshot record, the amount of increment in incrementing the total-size counter as an increment-size counter. A data management system may perform a correction operation to correct the total-size counter. The correction operation may change the total-size counter by a difference between the total of the increment-size counters in the snapshot records and the total data size of file data exchanged with the file system.

Growing community of inventors

Ghaziabad, India

Rohit Singh