公开(公告)号：SG142137A1

公开(公告)日：2008-05-28

申请号：SG2004018164

申请日：2004-04-02

Applicant: IBM

Inventor： CLARK THOMAS K ,  EVERHART CRAIG F ,  VENKATESWARARAO JUJJURI ,  WEIGHT RUSSELL H

IPC: G06F11/00 ,  G06F9/46 ,  G06F11/07 ,  H02H3/05

Abstract: AUTOMATICALLY FREEZING FUNCTIONALITY OF A COMPUTING ENTITY RESPONSIVE TO AN ERROR An arrangement for facilitating error handling of computing environments (100), including those environments (100) having file systems. Responsive to an entity of the computing environment, such as a client (110) of a file system, obtaining, in a step (200), at least an indication of an error, a portion of functionality of the entity is automatically frozen in a step (202). The obtaining is, for instance, responsive to an event of another entity of the computing environment, such as a server (112) of the file system. Eventually, the frozen functionality is thawed, at a step (206) allowing the functionality to proceed.

公开(公告)号：SG143951A1

公开(公告)日：2008-07-29

申请号：SG2004023149

申请日：2004-04-23

Applicant: IBM

Inventor： ANANTHANARAYANAN RAJAGOPAL ,  BECKER-SZENDY RALPH A ,  REES ROBERT M ,  BURNS RANDAL C ,  LONG DARRELL D E ,  VENKATESWARARAO JUJJURI ,  WOLFE DAVID M

IPC: G06F3/06 ,  G06F12/00 ,  G06F12/10

Abstract: METHOD, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR IMPLEMENTING COPY-ON-WRITE OF A FILE Various copy-on-write implementations for a computing environment are disclosed. One copy-on-write implementation includes employing a read mapping table (900) to map virtual blocks ( 1-4) to physical blocks (A, D, G and L) for use in reading a block of data of a file to be copy-on-written from physical storage for modification; and employing a different, write mapping table (910) to map virtual blocks (1-4) to physical blocks (W, X, Y and Z) for use in writing a modified block of the file data to physical storage, wherein copy-on-write of the block of data is achieved using a single write operation.