公开(公告)号：AT368886T

公开(公告)日：2007-08-15

申请号：AT04741751

申请日：2004-06-08

Applicant: IBM

Inventor： FACTOR MICHAEL ,  FIENBLIT SHACHAR ,  HAYARDENY AMIRAN ,  JARVIS THOMAS ,  MATOSEVICH RIVKA ,  MICKA WILLIAM ,  NURIEL IFAT ,  RAHAV SHELI ,  SHUKEVICH SVETLANA ,  SPEAR GAIL ,  TAL SIVAN ,  TZAFRIR DALIT

IPC: G06F3/06 ,  G06F11/20 ,  G06F12/00 ,  G06F12/08

Abstract: Provided are a method, system, and program for managing a relationship between one target volume and one source volume. For each of the source volume and target volume, the memory includes: (i) at least one element, wherein each element represents a range of sequential data units in the volume; (ii) at least one relationship entry, wherein each relationship entry represents one relationship; (iii) at least one element pointer associating one element with one relationship entry, wherein the data units represented by the element are part of the relationship represented by the relationship entry that the pointer associates with the element; and (iv) one relationship pointer for each relationship entry associating the relationship entry with volume metadata, wherein the volume metadata provides information on the relationship represented by the relationship entry.