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    • 76. 发明授权
    • Single instance store for file systems
    • 文件系统的单实例存储
    • US06477544B1
    • 2002-11-05
    • US09354624
    • 1999-07-16
    • William J. BoloskyJohn R. DouceurScott M. CutshallRichard F. RashidNathan P. MyhrvoldDavid A. Goebel
    • William J. BoloskyJohn R. DouceurScott M. CutshallRichard F. RashidNathan P. MyhrvoldDavid A. Goebel
    • G06F1730
    • G06F17/3015Y10S707/99931Y10S707/99933Y10S707/99953
    • A method and system for storing the data of files having duplicate content, by maintaining a single instance of the data, and providing logically separate links to the single instance. Files of duplicate content have their data stored in a common store file by a single instance store (SIS) facility, which also converts the original file or files to links to that common store file and creates additional links thereto as needed. The SIS facility may reside above a file system as a filter driver. File system requests directed to the link file (e.g., open, write, read, close and delete) reach the SIS filter, which then transparently handles each request as if the link file was a normal file. To preserve logical separation, writes to a SIS link file are to the link file, and the written portion recorded as dirty. The SIS filter intercepts SIS read requests, and reads clean portions from the common store file and any dirty portions from the link file. When the link file is closed, the common store file also may be closed, and, if the link file has been written, the non-dirtied portions of the link file are filled in with clean data from the common store file, and the link file reconverted to a normal file. Security is provided to prevent unauthorized access to the common store files, as is a volume check facility that repairs any inconsistencies in SIS metadata.
    • 一种用于通过维护单个数据实例来存储具有重复内容的文件的数据的方法和系统,以及向单一实例提供逻辑上分离的链接。 重复内容的文件通过单一实例存储(SIS)设施将其数据存储在公共存储文件中,该设备还将原始文件或文件转换为该通用存储文件的链接,并根据需要创建其他链接。 SIS工具可以作为过滤器驱动程序驻留在文件系统之上。 指向链接文件(例如打开,写入,读取,关闭和删除)的文件系统请求到达SIS过滤器,然后透明地处理每个请求,就像链接文件是正常文件一样。 为了保留逻辑分隔,对SIS链接文件的写入是链接文件,写入的部分记录为脏。 SIS过滤器拦截SIS读取请求,并从公共存储文件读取干净的部分以及链接文件中的任何脏部分。 当链接文件被关闭时,公共存储文件也可以被关闭,并且如果链接文件已被写入,链接文件的非污染部分用来自公共存储文件的干净的数据填充,并且链接 文件重新转换为正常文件。 提供安全性以防止对公用存储文件的未经授权的访问,以及修复SIS元数据中的任何不一致的卷检查工具。
    • 77. 发明授权
    • Method and system for scheduling the use of a computer system resource
using a resource planner and a resource provider
    • 使用资源规划者和资源提供者调度计算机系统资源使用的方法和系统
    • US6003061A
    • 1999-12-14
    • US569048
    • 1995-12-07
    • Michael B. JonesPaul J. LeachRichard P. Draves, Jr.Joseph S. Barrera, IIISteven P. LeviRichard F. RashidRobert P. Fitzgerald
    • Michael B. JonesPaul J. LeachRichard P. Draves, Jr.Joseph S. Barrera, IIISteven P. LeviRichard F. RashidRobert P. Fitzgerald
    • G06F9/50G06F9/00
    • G06F9/50G06F2209/5014
    • A method and system for scheduling the use of a computer system resource using a resource planner and a resource provider is provided. In a preferred embodiment, a resource is scheduled for use by a plurality of consumer entities. Each consumer entity may request the commitment of a share of the resource. The method and system utilizes representations of resource usage policy, present commitments of shares of the resource, and present commitments of specified amounts of the resource over specified period of time. The method and system first receives a request from a consumer entity for the commitment of a specified share of the resource. In response, the method and system determines whether the specified share of the resource should be committed to the requesting consumer entity. This determination is based on the representations of resource usage policy and present commitments of shares of the resource. If it is determined that the specified share of the resource should be committed to the requesting consumer entity, then the method and system modifies the representation of present commitments of shares of the resource to commit the specified share of the resource to the requesting consumer entity. The method and system then schedules the use of the resource by the plurality of consumer entity based on the modified representation of present commitments of shares of the resource.
    • 提供了一种用于使用资源规划器和资源提供者来调度计算机系统资源的使用的方法和系统。 在优选实施例中,资源被调度为由多个消费者实体使用。 每个消费者实体可以请求资源份额的承诺。 该方法和系统利用资源使用政策的表示,资源份额的现有承诺以及指定时间内资源规定数量的承诺。 方法和系统首先从消费者实体接收对资源的指定份额的承诺的请求。 作为响应,方法和系统确定资源的指定份额是否应该提交给请求的消费者实体。 这一决定是基于资源使用政策的表示和资源份额的现有承诺。 如果确定资源的指定份额应该提交给请求的消费者实体,那么该方法和系统将修改资源共享的当前承诺的表示,以将该资源的指定份额提交给请求的消费者实体。 该方法和系统随后基于对资源份额的当前承诺的修改表示来安排多个消费者实体对资源的使用。