US 7,636,743 B2Granted

Pathname translation in a data replication system

AssigneeCommvault Systems, Inc.

InventorAndrei Erofeev

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Abstract

Performing data management operations on replicated data in a computer network. Log entries are generated for data management operations of an application executing on a source system. Consistency point entries are used to indicate a time of a known good, or recoverable, state of the application. A destination system is configured to process a copy of the log and consistency point entries to replicate data in a replication volume, the replicated data being a copy of the application data on the source system. When the replicated data represents a known good state of the application, as determined by the consistency point entries, the destination system(s) may perform a storage operation (e.g., snapshot, backup) to copy the replicated data and to logically associate the copied data with a time information (e.g., time stamp) indicative of the source system time when the application was in the known good state.

Claims17

Dependent claims

A method for performing pathname translation in a data replication system, the method comprising:

storing log entries in a first log file on a source system;
copying at least a portion of the log entries to a second log file on a destination system;
processing the log entries in the second log file to create replicated data on a destination system, wherein one or more of the log entries identify a data management operation and an inode associated with a source system location corresponding to the data management operation, the inode being one of a plurality of inodes on the source system;
storing in a database on the destination system, a short inode name and a parent inode name for at least a first inode identified by the log entries in the second log file;
processing a log entry from the second log file on the destination device that identifies a second inode, wherein the first inode is the parent of the second inode;
accessing the database on the destination system to obtain path data for the second inode based on the short inode name and the parent inode name of the first inode stored in the database;
constructing from the path data an absolute pathname on the destination system that corresponds to the second inode of the log entry in the second log file.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/640,830Filed 18 Dec 2006 · us provisional application
Priority: 19 Dec 2005
Published: US 2007/0185852 A19 Aug 2007
Granted: 22 Dec 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G06F 16/184
Distributed file systems: implemented as replicated file system
G06F 16/166
File meta data generation: file name conversion
Y10S 707/99953
Coherency, e.g. same view to multiple users: recoverability
Y10S 707/99955
Coherency, e.g. same view to multiple users: archiving or backup

Family

Application60/752,204Us provisional application · filed 19 Dec 2005
Application60/833,851Us provisional application · filed 27 Jul 2006
US 2007/0185852 A1Pre-grant publication · published 9 Aug 2007
US 7,636,743 B2This patent

From the US filing history. Foreign family members aren’t listed.