Patent
Technique for enabling operation of a computer system with a consistent state of a linked list data structure after a main memory failure
John D. Gabbe,Matthew S. Hecht +1 more
TLDR
In this article, the shadow copy of a data structure is periodically updated at a series of checkpoints, and updating without recopying is enabled by prelinking the list item in the read-only list to the beginning of a second read/write list, which is appended to the first list at the next checkpoint.Abstract:
Operation of a computer system after a main memory failure is enabled by storing a read-only access shadow copy of its data structures in another memory having an independent failure mode. The shadow copy is periodically updated at a series of checkpoints. Where the data structure is a linked list, updating without recopying is enabled by prelinking the list item in the read-only list to the beginning of a second read/write list, which is appended to the first list at the next checkpoint.read more
Citations
More filters
Patent
Backup system that takes a snapshot of the locations in a mass storage device that has been identified for updating prior to updating
TL;DR: In this article, a system and method for maintaining logically consistent backups using minimal data transfer is presented, which comprises a backup system having a backup storage device and one or more primary systems having mass storage devices that are to be backed up on the backup storage devices.
Patent
Removable transceiver module and receptacle
TL;DR: In this paper, a robust optoelectronic transceiver module which is quick, easy, and inexpensive to manufacture is presented, consisting of a main housing which consists of a potting box with potting material inserted therein.
Patent
Method and system for providing a static snapshot of data stored on a mass storage system
TL;DR: In this paper, a system and method for providing a static snapshot, or image, of data stored on a mass storage system are disclosed, where a preservation memory is cleared and a virtual device is created, and a check is made of the preservation memory to determine if it contains a block associated with the virtual device read address.
Patent
High speed interface converter module
Raul Medina,John J. Daly +1 more
TL;DR: In this paper, an interface converter module is provided for converting data signals from a first transmission medium to a second transmission medium, which is also referred to as a media interface converter.
Patent
Fault tolerant computer backup system
James A. Horton,Stephen M. Getz +1 more
TL;DR: In this paper, a method and apparatus for storing and retrieving any prior state of a computer system is provided, where the system monitors changes to the state of the host and subsequently stores at least some of these changes on the storage device.
References
More filters
Book ChapterDOI
Notes on Data Base Operating Systems
TL;DR: This paper is a compendium of data base management operating systems folklore and focuses on particular issues unique to the transaction management component especially locking and recovery.
Journal ArticleDOI
Physical integrity in a large segmented database
TL;DR: A recovery scheme is first proposed for system failure (hardware or software error which causes the contents of main storage to be lost) and a facility for protection against damage to the auxiliary storage itself is proposed.
Journal ArticleDOI
Experience with processes and monitors in Mesa
TL;DR: These problems are addressed by the facilities described here for concurrent programming in Mesa, and experience with several substantial applications gives us some confidence in the validity of the solutions.
Patent
System for facilitating the copying back of data in disc and tape units of a memory hierarchial system
TL;DR: In this paper, a multi-level or hierarchial memory system for a multi processing system in which two or more processing units access the memory system has been proposed, with two types of memory units on each level with the exception of the lowest level.
Journal ArticleDOI
Recovery Techniques for Database Systems
TL;DR: A survey of techniques and tools used in filing systems, database systems, and operating systems for recovery, backing out, restart, the mamtenance of consistency, and for the provismn of crash resistance is given.