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1. 发明授权

US07539892B2 Enhanced resynchronization in a storage-based mirroring system having different storage geometries 失效
标题翻译：在具有不同存储几何形状的基于存储的镜像系统中增强了重新同步
公开(公告)号：US07539892B2
公开(公告)日：2009-05-26
申请号：US11251339
申请日：2005-10-14
申请人： Pierre-Fortin Jean-Denis , Gail A Spear , Robert F Bartfai , Warren K Stanley
发明人： Pierre-Fortin Jean-Denis , Gail A Spear , Robert F Bartfai , Warren K Stanley
IPC分类号： G06F11/00
CPC分类号： G06F11/2082 , G06F11/2071
摘要： Resynchronization of data between a primary (production) data site and a secondary (recovery) site following a failure is enhanced when the size of a data track at the production site is different from the size of a data track at the recovery site. The recovery site reads an out-of-sync (OOS) bitmap created at the production site and expands or contracts the bitmap to accommodate the size difference. The resulting production site bitmap is merged with a OOS bitmap maintained at the recovery site to indicate those tracks which are to be transferred from the recovery site to the production site. Thus, only those tracks which are required to be transferred are transferred. Buffer space may be allocated in which to expand or contract the production site OOS bitmap. Buffer space may be conserved by sequentially reading portions of the production site OOS bitmap into a small buffer. In a first operation, half of the bitmap portion is discarded and the remaining half is expanded into the buffer and merged with a corresponding section of the recovery site OOS bitmap. In a second operation, the portion is re-read into the buffer and the other half discarded. The remaining half is then expanded into the buffer and merged with the corresponding section of the recovery site OOS bitmap. The process continues until the entire production site OOS bitmap has been merged with the recovery site OOS bitmap.
摘要翻译：当生产现场的数据轨道的大小与恢复站点上的数据轨道的大小不同时，会在故障后的主要（生产）数据站点和辅助（恢复）站点之间重新同步数据。恢复站点读取在生产站点创建的不同步（OOS）位图，并扩展或收缩位图以适应大小差异。生成的生产站点位图与恢复站点上维护的OOS位图合并，以指示要从恢复站点传输到生产站点的轨道。因此，仅传送需要传送的那些轨道。可以分配缓冲区空间来扩展或收缩生产站点OOS位图。可以通过将生产站点OOS位图的部分顺序读入小缓冲区来保存缓冲区空间。在第一个操作中，位图部分的一半被丢弃，剩下的一半被扩展到缓冲区，并与恢复站点OOS位图的相应部分合并。在第二操作中，该部分被重新读入缓冲器，另一半被丢弃。然后剩下的一半扩展到缓冲区并与恢复站点OOS位图的相应部分合并。该过程一直持续到整个生产站点OOS位图已经与恢复站点OOS位图合并。

2. 发明授权

US08676748B2 Clearing metadata tracks in a storage system 有权
标题翻译：清除存储系统中的元数据跟踪
公开(公告)号：US08676748B2
公开(公告)日：2014-03-18
申请号：US10993048
申请日：2004-11-18
申请人： Angelique R Budaya , Aaron S Mahar , James A Springer , Warren K Stanley , Gail A Spear
发明人： Angelique R Budaya , Aaron S Mahar , James A Springer , Warren K Stanley , Gail A Spear
IPC分类号： G06F17/30
CPC分类号： G06F17/30067
摘要： Methods, systems, computer program products and methods for deploying computing infrastructure for clearing metadata in a storage subsystem. The method includes identifying one or more metadata tracks to clear, receiving a request from a client to clear the identified tracks, quiescing any active processes, clearing the identified tracks and resuming the quiesced processes. The request may be a single request operable to clear all metadata tracks. Alternatively, target volumes having metadata tracks to be cleared are identified and a request is received from a client for each target volume. A dynamic function list may also be created for each target volume, the list including a list of functions in which the target volume is associated. After active processes are quiesced, each function in the dynamic function list of each target volume is invoked whereby the metadata tracks are cleared. The quiesced processes are then resumed.
摘要翻译：用于部署用于清除存储子系统中的元数据的计算基础设施的方法，系统，计算机程序产品和方法。该方法包括识别一个或多个元数据轨道以清除，接收来自客户端的请求以清除所识别的轨道，停止任何活动进程，清除所识别的轨道并恢复静默过程。请求可以是可用于清除所有元数据轨道的单个请求。或者，识别具有待清除的元数据轨迹的目标卷，并且从客户端接收针对每个目标卷的请求。也可以为每个目标卷创建动态功能列表，该列表包括目标卷相关联的功能列表。在活动进程停顿后，将调用每个目标卷的动态功能列表中的每个功能，从而清除元数据轨。然后恢复静态过程。

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