Device Locks: mutual exclusion for storage area networks

Author

Preslan, Kenneth W. ; Soltis, Steven R. ; Sabol, Christopher J. ; O´Keefe, M.T. ; Houlder, Gerry ; Coomes, Jim

Author_Institution

Parallel Comput. Syst. Lab., Minnesota Univ., MN, USA

fYear

1999

fDate

6/21/1905 12:00:00 AM

Firstpage

262

Lastpage

274

Abstract

Device Locks are mechanisms used in distributed environments to facilitate mutual exclusion of shared resources. They can further be used to maintain coherence of data that is cached in several locations. The locks are implemented on the storage devices and accessed with the SCSI device lock command, Dlock. The paper presents the Dlock command and discusses how it can be used as a mutual exclusion device for storage area networks and shared disk file systems. Methods for the recovery of a Dlock held by a failed initiator are also presented. The Dlock command is in the process of being standardized as part of the SCSI 3 specification

Keywords

cache storage; concurrency control; peripheral interfaces; shared memory systems; system recovery; Device Locks; Dlock command; SCSI 3 specification; SCSI device lock command; data coherence; distributed environments; failed initiator; mutual exclusion; shared disk file systems; shared resources; storage area networks; storage devices; Concurrent computing; Current measurement; Distributed computing; File systems; Laboratories; Laser mode locking; Load management; Protection; Storage area networks; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Mass Storage Systems, 1999. 16th IEEE Symposium on

Conference_Location

San Diego, CA

ISSN

1051-9173

Print_ISBN

0-7695-0204-0

Type

conf

DOI

10.1109/MASS.1999.830062

Filename

830062