公开(公告)号：CA2338915C

公开(公告)日：2009-01-06

申请号：CA2338915

申请日：2001-02-28

Applicant: IBM

Inventor： ROUVELLOU ISABELLE M ,  DEGENARO LOUIS R ,  EHNEBUSKE DAVID L ,  IYENGAR ARUN K ,  MCKEE BARBARA JANE ALSPACH

IPC: G06F12/02 ,  G06F12/12 ,  G06F17/30

Abstract: A system and method for managing cacheable sets of objects having explicit lifetime specifications, wherein a time-based cache manager maintains and updates one or more sets of objects stored in the cache. A cached set of objects comprises objects havin g start times and/or end times representing, respectively, times at which such objects become val id and expire. An update time is determined for a given cached set of objects based, in part, on the start times and end times of objects comprising the cached set of objects. When a request fo r the retrieval of an object from the given cached set of objects (or the entire cached set) is received, a determination is made if the cached set of objects is valid at the time of the request bas ed on the update time. If the cached set of objects is not valid because, e.g., the update time has elapsed, the cached set of objects is updated (and any other cached sets, if necessary) by deleting and/or adding objects to the cached set of objects having start times and end times that meet predefined time criteria for inclusion in the cached set of objects.

公开(公告)号：CA2338915A1

公开(公告)日：2001-10-04

申请号：CA2338915

申请日：2001-02-28

Applicant: IBM

Inventor： IYENGAR ARUN K ,  MCKEE BARBARA JANE ALSPACH ,  ROUVELLOU ISABELLE M ,  EHNEBUSKE DAVID L ,  DEGENARO LOUIS R

IPC: G06F12/12 ,  G06F12/02 ,  G06F17/30

Abstract: A system and method for managing cacheable sets of objects having explicit lifetime specifications, wherein a time-based cache manager maintains and updates one or more sets of objects stored in the cache. A cached set of objects comprises objects havin g start times and/or end times representing, respectively, times at which such objects become val id and expire. An update time is determined for a given cached set of objects based, in part, on the start times and end times of objects comprising the cached set of objects. When a request fo r the retrieval of an object from the given cached set of objects (or the entire cached set) is received, a determination is made if the cached set of objects is valid at the time of the request bas ed on the update time. If the cached set of objects is not valid because, e.g., the update time has elapsed, the cached set of objects is updated (and any other cached sets, if necessary) by deleting and/or adding objects to the cached set of objects having start times and end times that meet predefined time criteria for inclusion in the cached set of objects.