Parallel file system and method anticipating cache usage pattern

Details Parallel file system and method anticipating cache usage pattern Parallel file system and method anticipating cache usage pattern

1997-07-11

1999-08-17

Lintz, Paul R.

Data processing: database and file management or data structures

Database design

Data structure types

G06F 1202

Patent

active

059408383

ABSTRACT:
A computer system having a shared disk file system running on on multiple computers each having their own instance of an operating system and being coupled for parallel data sharing access to files residing on network attached shared disks. Methods are provided for use as a parallel file system in a shared disk environment by use of a scalable directory service for the system with a stable cursor, a segmented allocation map. Dynamic prefetch and cached balance pools for multiple accesses improve the system. Extended file attributes are used for implementation of Access Control Lists in a parallel file system. Improvements to caching and cache performance developments balance pools for multiple accesses. A metadata node manages file metadata for parallel read and write actions. For our system, tokens are used for metadata node selection and identification, and we have enhanced token modes for controlling file size, as well as smart caching of byte range tokens using file access patterns and a byte range lock algorithm using a byte range token interface. Locking techniques reduce the overhead of a token manager which is also used in the file system recovery if a computer participating in the management of shared disks becomes unavailable or failed.

REFERENCES:
patent: 4274139 (1981-06-01), Hodgkinson et al.
patent: 5043876 (1991-08-01), Terry
patent: 5202971 (1993-04-01), Henson et al.
patent: 5226159 (1993-07-01), Henson et al.
patent: 5454108 (1995-09-01), Devarakonda et al.
patent: 5463736 (1995-10-01), Elko et al.
patent: 5490270 (1996-02-01), Devarakonda et al.
patent: 5537568 (1996-07-01), Yanai et al.
patent: 5566297 (1996-10-01), Devarakonda et al.
patent: 5627994 (1997-05-01), Levy et al.
patent: 5649156 (1997-07-01), Vishlitzky et al.
patent: 5682500 (1997-10-01), Vishlitzky et al.
patent: 5761717 (1998-06-01), Vishlitzky et al.
"CMS Interactive File Sharing Prototype", by Eshel et al., IBM Research Division, T.J. Watson Research Center, Yorktown Heights, NY, RC13371 (#50869) Dec. 18, 1987.
"IBM VideoCharger Server for AIX", International Business Machines Corporation, Mar. 1997.

Affiliated with

Also associated with

Rating

Parallel file system and method anticipating cache usage pattern does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Parallel file system and method anticipating cache usage pattern, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Parallel file system and method anticipating cache usage pattern will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-325887