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1. 发明公开

EP2353081A4 MANAGING CACHE DATA AND METADATA 有权转让
标题翻译： VERWALTUNG VON CACHE-DATEN UND -METADATEN
公开(公告)号：EP2353081A4
公开(公告)日：2012-06-27
申请号：EP09826570
申请日：2009-11-03
申请人： MICROSOFT CORP
发明人： IYIGUN MEHMET , BAK YEVGENIY , FORTIN MICHAEL , FIELDS DAVID , ERGAN CENK , KIRSHENBAUM ALEXANDER
IPC分类号： G06F9/00 , G06F12/08 , G06F13/10
CPC分类号： G06F12/0866 , G06F12/0804 , G06F12/0862 , G06F12/0871 , G06F12/14 , G06F2212/1016 , G06F2212/1032 , G06F2212/1052 , G06F2212/2022 , G06F2212/222 , G06F2212/466
摘要： Embodiments of the invention provide techniques for managing cache metadata providing a mapping between addresses on a storage medium (e.g., disk storage) and corresponding addresses on a cache device at data items are stored. In some embodiments, cache metadata may be stored in a hierarchical data structure comprising a plurality of hierarchy levels. Only a subset of the plurality of hierarchy levels may be loaded to memory, thereby reducing the memory “footprint” of cache metadata and expediting the process of restoring the cache metadata during startup operations. Startup may be further expedited by using cache metadata to perform operations associated with reboot. Thereafter, as requests to read data items on the storage medium are processed using cache metadata to identify addresses at which the data items are stored in cache, the identified addresses may be stored in memory. When the computer is later shut down, instead of having to transfer the entirety of the cache metadata from memory to storage, only the subset of the plurality of hierarchy levels and/or the identified addresses previously loaded to memory may be transferred (e.g., to the cache device), thereby expediting the shutdown of the computer.
摘要翻译：本发明的实施例提供了用于管理提供存储介质（例如，磁盘存储）上的地址之间的映射的高速缓存元数据和存储数据项上的高速缓存设备上的相应地址的技术。在一些实施例中，高速缓存元数据可以存储在包括多个层次级别的分层数据结构中。可以仅将多个层次级别的子集加载到存储器，从而减少高速缓存元数据的存储器“占用空间”，并且在启动操作期间加快恢复高速缓存元数据的过程。通过使用缓存元数据来执行与重新启动相关的操作，可以进一步加快启动。此后，当使用高速缓存元数据来处理在存储介质上读取数据项的请求时，识别数据项被存储在高速缓存中的地址，所识别的地址可被存储在存储器中。当计算机稍后关闭时，不是必须将整个高速缓存元数据从存储器传送到存储器，所以只有先前加载到存储器的多层次级别和/或已识别地址的子集可以被传送（例如，缓存设备），从而加速计算机的关闭。

2. 发明公开

EP2329360A4 MANAGING CACHE DATA AND METADATA 有权转让
标题翻译：高速缓存数据和元数据的管理
公开(公告)号：EP2329360A4
公开(公告)日：2012-05-02
申请号：EP09813565
申请日：2009-09-09
申请人： MICROSOFT CORP
发明人： IYIGUN MEHMET , BAK YEVGENIY , FORTIN MICHAEL , FIELDS DAVID , ERGAN CENK , KIRSHENBAUM ALEXANDER
IPC分类号： G06F9/06 , G06F1/32 , G06F3/06 , G06F11/14 , G06F12/02 , G06F12/08
CPC分类号： G06F12/0833 , G06F11/1441 , G06F12/0862 , G06F12/0866 , G06F12/128 , G06F12/14 , G06F2212/1052 , G06F2212/2022 , G06F2212/2146 , G06F2212/222 , G06F2212/466 , G06F2212/62 , Y02D10/13
摘要： To ensure that the contents of a non-volatile memory device cache may be relied upon as accurately reflecting data stored on disk storage, it may be determined whether the cache contents and/or disk contents are modified during a power transition, causing cache contents to no longer accurately reflect data stored in disk storage. The cache device may be removable from the computer, and unexpected removal of the cache device may cause cache contents to no longer accurately reflect data stored in disk storage. Cache metadata may be managed during normal operations and across power transitions, ensuring that cache metadata may be efficiently accessed and reliably saved and restored across power transitions. A state of a log used by a file system may be determined prior to and subsequent to reboot of an operating system in order to determine whether data stored on a cache device may be reliably used.
摘要翻译：为了确保非易失性存储器件缓存的内容可以被准确地反映存储在磁盘存储器上的数据，可以确定在功率转换期间高速缓存内容和/或盘内容是否被修改，从而使缓存内容成为不再准确反映存储在磁盘存储中的数据。高速缓存设备可以从计算机移除，并且高速缓存设备的意外移除可能导致高速缓存内容不再准确地反映存储在磁盘存储器中的数据。高速缓存元数据可以在正常操作和功率转换期间进行管理，从而确保高速缓存元数据可以被有效地访问，并且在功率转换之间可靠地保存和恢复。可以在操作系统重新启动之前和之后确定文件系统使用的日志的状态，以便确定存储在高速缓存设备上的数据是否可以被可靠地使用。

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