公开(公告)号：US07167969B2

公开(公告)日：2007-01-23

申请号：US10671035

申请日：2003-09-25

申请人： Kevin Curtis Griffin ,  Scott Dennis Helt ,  Glen Warren Nelson ,  Mark Philip Piazza ,  Gary Ross Ricard

发明人： Kevin Curtis Griffin ,  Scott Dennis Helt ,  Glen Warren Nelson ,  Mark Philip Piazza ,  Gary Ross Ricard

IPC分类号： G06F12/00

CPC分类号： G06F12/1441 ,  G06F11/2056

摘要： An apparatus and method provides the capability of mirroring storage from a primary system to a mirrored system in a way that uses parallelism in the mirrored system to maximize the efficiency of writing data to the mirrored storage for operations that do not conflict while serializing operations that do conflict. The mirroring of the present invention is “logical mirroring”, which does not require identical disk drives, and which supports mirroring between geographically remote locations to protect against catastrophic site failure. Parallelism is achieved in the mirrored system by dividing the virtual address space into multiple ranges, and by assigning a group of tasks to each range. When an operation is received on the mirrored system, the virtual address range that the operation affects is determined, and the operation is then delegated to the task group that corresponds to the affected virtual address range. By dividing the virtual address space into ranges, tasks in different ranges (i.e., in different task groups) may execute in parallel without any threat of conflict, and even tasks within the same range may execute in parallel if they operate in different portions of the range.

摘要翻译： 一种装置和方法提供将存储从主系统镜像到镜像系统的能力，其方法是使用镜像系统中的并行性来最大限度地提高将数据写入镜像存储器的效率，以用于在串行化操作时不冲突的操作 冲突。 本发明的镜像是“逻辑镜像”，其不需要相同的磁盘驱动器，并且其支持在地理上偏远的位置之间的镜像，以防止灾难性的站点故障。 通过将虚拟地址空间划分为多个范围，并通过为每个范围分配一组任务，在镜像系统中实现并行化。 当在镜像系统上接收到操作时，确定操作影响的虚拟地址范围，然后将该操作委派给与受影响的虚拟地址范围对应的任务组。 通过将虚拟地址空间划分为范围，不同范围内的任务（即，在不同的任务组中）可以并行执行，而不会产生任何冲突的威胁，如果在相同范围内的任务可以并行执行，如果它们在 范围。

公开(公告)号：US06324620B1

公开(公告)日：2001-11-27

申请号：US09121449

申请日：1998-07-23

申请人： Patrick James Christenson ,  Michael Joseph Corrigan ,  Thomas Richard Crowley ,  Michael Steven Faunce ,  Michael James McDermott ,  Timothy John Mullins ,  Glen Warren Nelson ,  Russell Paul VanDuine ,  Bruce Marshall Walk

发明人： Patrick James Christenson ,  Michael Joseph Corrigan ,  Thomas Richard Crowley ,  Michael Steven Faunce ,  Michael James McDermott ,  Timothy John Mullins ,  Glen Warren Nelson ,  Russell Paul VanDuine ,  Bruce Marshall Walk

IPC分类号： G06F1200

CPC分类号： G06F3/061 ,  G06F3/0644 ,  G06F3/0653 ,  G06F3/0674

摘要： Method and apparatus for managing data on DASD units to improve system performance comprises monitoring portions of data on a plurality of DASD units to determine the times the data is accessed within a given time period, and characterizing accessed data portions of a DASD unit as HOT and COLD data. The DASD units are monitored to determine the number of times each unit is accessed within a time period to develop utilization factors reflective of the number of times the DASD unit is accessed during the time period. HOT and COLD data is moved between DASD units based on the utilization factors of the DASD units.

摘要翻译： 用于管理DASD单元上的数据以提高系统性能的方法和装置包括监视多个DASD单元上的数据部分以确定在给定时间段内数据被访问的次数，以及将DASD单元的访问数据部分表征为HOT，以及 COLD数据。 监视DASD单元以确定每个单元在一段时间内访问的次数，以开发反映在该时间段期间访问DASD单元的次数的利用因子。 基于DASD单元的利用率，HOT和COLD数据在DASD单元之间移动。