Instant copy of data in a cache memory via an atomic command

Details Instant copy of data in a cache memory via an atomic command Instant copy of data in a cache memory via an atomic command

2006-07-21

2009-06-23

Nguyen, Than (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S161000

Reexamination Certificate

active

07552297

ABSTRACT:
A system and method are described to improve the efficiency of copy-on-write operations in a storage system. A PDSS descriptor associated with partition PSS and a PDTT descriptor associated with partition PTT are maintained in a cache memory, with partition PSS associated with a source logical unit LUSand partition PTT associated with a source logical unit LUT. An ICP flag is set in the PDSS and PDTT descriptors indicating that the PSS and PTT are undergoing a copy-on-write operation. Data is then dissociated with PTT and locations of each block of the PSS stored in memory are copied from the PDSS descriptor to the PDTT descriptor. A task is then created to fetch blocks of the PSS and the fetched blocks are copied from the PSS to the PTT.

REFERENCES:
patent: 6532527 (2003-03-01), Selkirk et al.
patent: 6779095 (2004-08-01), Selkirk et al.
patent: 6792518 (2004-09-01), Armangau et al.
patent: 7246211 (2007-07-01), Beloussov et al.
patent: 7318135 (2008-01-01), Tormasov et al.

Affiliated with

Also associated with

Rating

Instant copy of data in a cache memory via an atomic command does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Instant copy of data in a cache memory via an atomic command, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Instant copy of data in a cache memory via an atomic command will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4061295