Preserving cache data against cluster reboot

Details Preserving cache data against cluster reboot Preserving cache data against cluster reboot

2006-11-21

2006-11-21

Baderman, Scott (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S005110, C714S006130, C714S006130, C711S114000

Reexamination Certificate

active

07139933

ABSTRACT:
A dual cluster storage server maintains track control blocks (TCBs) in a data structure to describe the data stored in cache in corresponding track images or segments. Following a cluster failure and reboot, the surviving cluster uses the TCBs to rebuild data structures such as a scatter table, which is a hash table that identifies a location of a track image, and a least recently used (LRU)/most recently used (MRU) list for the track images. This allows the cache data to be recovered. The TCBs describe whether the data in the track images is modified and valid, and describe forward and backward pointers for the data in the LRU/MRU lists. A separate non-volatile memory that is updated as the track images are updated is used to verify the integrity of the TCBs.

REFERENCES:
patent: 5341493 (1994-08-01), Yanai et al.
patent: 5448719 (1995-09-01), Schultz et al.
patent: 5519831 (1996-05-01), Holzhammer
patent: 5623604 (1997-04-01), Russell et al.
patent: 5724501 (1998-03-01), Dewey et al.
patent: 5761406 (1998-06-01), Kobayashi et al.
patent: 5774643 (1998-06-01), Lubbers et al.
patent: 5828823 (1998-10-01), Byers et al.
patent: 6243831 (2001-06-01), Mustafa et al.
patent: 6295577 (2001-09-01), Anderson et al.
patent: 6438661 (2002-08-01), Beardsley et al.
patent: 6516426 (2003-02-01), Forehand et al.
patent: 6543049 (2003-04-01), Bates et al.
patent: 2002/0078399 (2002-06-01), Caulkins
patent: 2004/0250022 (2004-12-01), Jarvis et al.
“Mechanism to establish the normal/good reboot path e.g. for computer systems, in which IPL is achieved with saved persistence boot time configuration”, IBM RD-438159, Oct. 10, 2000 (abstract).

Affiliated with

Also associated with

Rating

Preserving cache data against cluster reboot does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preserving cache data against cluster reboot, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preserving cache data against cluster reboot will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3650822