SYSTEMS AND METHODS FOR PERFORMING DATA REPLICATION

• US 20140032495A1
• Filed: 09/26/2013
• Published: 01/30/2014
• Est. Priority Date: 05/28/2010
• Status: Active Grant

• Current Assignee: CommVault Systems Incorporated
• Original Assignee: CommVault Systems Incorporated
• Inventors: Erofeev, Andrei
• Granted Patent: US 8,745,105 B2
• Time in Patent Office: Days
• US Class Current: 707/634
• CPC Class Codes: G06F 11/1435 using file system or storage system metadata
• CPC Class Codes: G06F 11/1458 Management of the backup or restore process
• CPC Class Codes: G06F 11/1471 involving logging of persistent data for recovery
• CPC Class Codes: G06F 11/1662 the resynchronized component or unit being a persistent storage device re-synchronization of failed mirror storage G06F11/2082; rebuild or reconstruction of parity RAID storage G06F11/1008
• CPC Class Codes: G06F 11/2094 Redundant storage or storage space G06F11/2056 takes precedence
• CPC Class Codes: G06F 16/1734 Details of monitoring file system events, e.g. by the use of hooks, filter drivers, logs
• CPC Class Codes: G06F 16/1844 Management specifically adapted to replicated file systems
• CPC Class Codes: G06F 2201/84 Using snapshots, i.e. a logical point-in-time copy of the data
• CPC Class Codes: H04L 67/1095 Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes

Abstract

Preparing source data to be replicated in a continuous data replication environment. Certain systems and methods populate a file name database with entries having a unique file identifier descriptor (FID), short name and a FID of the parent directory of each directory or file on a source storage device. Such information is advantageously gathered during scanning of a live file system without requiring a snapshot of the source storage device. The database can be further used to generate absolute file names associated with data operations to be replayed on a destination storage device. Based on the obtained FIDs, certain embodiments can further combine write operations to be replayed on the destination storage device and/or avoid replicating temporary files to the destination system.

Claims

1. A method for performing data replication, the method comprising:

monitoring data operations associated with an application executing on a computing device, the data operations operative to write data to a first storage device;

populating a log file with a plurality of data entries indicative of the data operations;

identifying a first one of the plurality of data entries associated with writing data to a temporary file on the first storage device; and

replaying to a second storage device, based on a portion of the data entries, a portion of the data operations to replicate data to a first location on the second storage device, wherein the portion of the data entries does not include the first one of the plurality of data entries.