Patent
Data backup using metadata mapping
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TLDR
In this paper, an information processing apparatus, backup method, and program product that enable efficient differential backup of files stored in a storage device is presented, including a metadata management unit, a map generation unit, and a backup management unit for scanning metadata to detect files that have been created, modified, or deleted since the last backup.Abstract:
An information processing apparatus, backup method, and program product that enable efficient differential backup. In one embodiment, an information processing apparatus for files stored in a storage device includes: a metadata management unit for managing metadata of files stored in the storage device; a map generation unit for generating a map which indicates whether metadata associated with an identification value uniquely identifying a file in the storage device is present or absent; and a backup management unit for scanning the metadata to detect files that have been created, modified, or deleted since the last backup, and storing at least a data block and the metadata for a detected file in a backup storage device as backup information in association with the identification value.read more
Citations
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Patent
Minimizing a footprint of incremental backups
TL;DR: A backup operation can identify blocks that have changed since a most recent backup operation and compare the blocks that are being used with those that are not being used to reduce the size of the backup be excluding blocks that may have changed but are no longer used as mentioned in this paper.
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Efficient content indexing of incremental block-based backups
Patwardhan Kedar,Nair Rajesh +1 more
TL;DR: In this article, a first list is received including locations of blocks of a file system that changed between current and previous backups, and a superblock of the file system is read to generate a second list including location of metadata records representing file objects.
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Forming a consistency group comprised of volumes maintained by one or more storage controllers
TL;DR: In this paper, the point-in-time copies at the storage units are formed at which the suspension of I/O operations was ended after being successfully suspended, and the consistency of the point in-time copy is maintained as of a same point in time.
References
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Patent
System and method for determining changes in two snapshots and for transmitting changes to destination snapshot
TL;DR: In this article, a scan of the blocks that make up two versions of a snapshot of the source file system, which identifies changed blocks in the respective snapshot files based upon differences in volume block numbers identified in a scan on the logical file block index of each snapshot.
Patent
System and method for providing highly available data storage using globally addressable memory
John B. Carter,Scott H. Davis,Daniel J. Dietterich,Steven J. Frank,Robert S. Phillips,John Woods,David Porter,H. Hsin Lee +7 more
TL;DR: In this article, a network of computer nodes interface to globally addressable memory system that provides persistent storage of data exchange periodic connectivity information is described. But, it does not specify how to recover the portion of the global address space for which the failed node was responsible.
Patent
System and method for distributed storage management on networked computer systems using binary object identifiers
TL;DR: In this article, the authors present a distributed storage management system for networked computer systems with at least two storage devices for storing data files comprised of one or more binary objects, which includes a device for selectively copying the binary objects stored on one of the storage devices to another of the devices and another device for calculating a current value for a binary object identifier for selected binary objects.
Patent
Method and apparatus for storage system to provide distributed data storage and protection
David G. Therrien,James E. Pownell,Adrian Vanderspek,Herman Robert Kenna,Cory Lee Sawyer,Elizabeth Dougherty,Dave Voegtlin,Paul B. Greizerstein +7 more
TL;DR: In this paper, the authors present a computer primary data storage system that integrates the functionality of file backup and remote replication to provide an integrated storage system, based on the concept of file replication.