Cohesity, Inc.

Anand Arun

Rupesh Bajaj

Yinzen Hwang

Shreshtha Mundra

Shubham Parashram Sawant

Apurv Gupta

Himanshu Mehra

Amandeep Gautam

Debasish Garai

Vairavanathan Emalayan

Chinmaya Manjunath

Markose Thomas

Zheng Cai

A computing device comprising a storage device and processing circuitry may perform the techniques of this disclosure. The storage device may have a plurality of blocks forming a volume. The processing circuitry may obtain volume changed block tracking (CBT) information identifying one or more of the blocks storing updated data that has changed relative to a previous backup of the one or more blocks, and determine file mapping information identifying one or more blocks of the plurality of blocks that store file data associated with a file. The processing circuitry may also determine, based on the volume CBT information and the file mapping information, file system CBT information identifying whether at least one of the one or more blocks store file data associated with the file have changed, and initiate, based on the file system CBT information, a subsequent backup of at least a portion of the file data.

File system changed block tracking for data platforms

A request to restore a specific backup instance is received. In response to the received request to restore the specific backup instance, a new reference backup instance based on the specific backup instance stored at the storage controlled by the backup system is created at a storage controlled by a backup system. Data associated with the specific backup instance is provided to a recipient system from the storage associated with a backup system. A constructive incremental backup snapshot of the recipient system is performed based on the new reference backup instance.

Efficient backup after a restore operation

An identification of a new primary snapshot created for a primary storage system is received. A change tracking time window that is at least a portion of a period between a first capture time associated with a previous primary snapshot and a second capture time associated with the new primary snapshot is determined. Entries of a storage log of the primary storage system occurring within the change tracking time window are analyzed to coalesce changes identified in the entries of the storage log occurring within the change tracking time window into a change tracking result set. The change tracking result set is used to identify at least a portion of data changes between the previous primary snapshot and the new primary snapshot to capture in a new backup snapshot stored at a secondary storage system.

Coalescing storage log entries

An identification of a new primary snapshot created for a primary storage system is received. A threshold time window based on a capture time associated with the new primary snapshot is determined. Entries of a storage log of the primary storage system occurring within the threshold time window are analyzed to identify any objects of the primary storage system that have changed during the threshold time window. Changed objects to capture in a new secondary backup stored at a secondary storage system and corresponding to the new primary snapshot are identified. Metadata of the new primary snapshot and metadata of a previous secondary backup are compared to determine for each of the objects of the primary storage system identified as having changed during the threshold time window whether a change to an object since the previous secondary backup is captured in the new primary snapshot.

Using a storage log to generate an incremental backup

A method and system for migrating data are described. A storage capture instance in a first format from a first type of device is received. Processing utilized to back up the storage capture instance to a second format of a snapshot tree is distributed to multiple storage nodes. A request to migrate at least part of the storage capture instance to a second type of device in a third format is received. In response to the request, processing utilized to migrate the at least part of the storage capture instance from the second format to the second type of device in the third format is distributed to the storage nodes. In one aspect, file(s) in a first network attached storage (NAS) device format are migrated to a second NAS device format. In another aspect, a virtual machine (VM) and/or file(s) therein having a first VM format are migrated to a second VM format.

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San Jose, CA, United States of America

Anand Arun