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    • 1. 发明授权
    • Journaling ordered changes in a storage volume
    • 日记功能订购存储卷中的更改
    • US06189016B1
    • 2001-02-13
    • US09097288
    • 1998-06-12
    • Luis Felipe CabreraThomas J. MillerBrian D. AndrewMark J. ZbikowskiGary D. Kimura
    • Luis Felipe CabreraThomas J. MillerBrian D. AndrewMark J. ZbikowskiGary D. Kimura
    • G06F1730
    • G06F17/30067Y10S707/99952Y10S707/99953Y10S707/99954
    • A change journal for recording changes to files in a storage volume of a computer system keeps a record for each notable change to a file. Each record is given a unique update sequence number, which is a serial number of ever-increasing value assigned to each record. Each record includes one or more change reasons specifying what type of action occurred with respect to the associated file. The presence of a close file change reason in a record connotes that the record includes all the notable changes made to the file in a preceding file session, which is defined as the time occurring after the last time a close file change reason was entered in a change record, up to the time of the next succeeding close file change reason. For each file, an entry is made in the storage volume's master file table referencing the change record that currently includes the most up-to-date information on the status of the change reasons for the file.
    • 用于记录对计算机系统的存储卷中的文件的更改的更改日志将为文件的每个显着更改保留记录。 每个记录都有一个唯一的更新序列号,它是分配给每个记录的不断增加的值的序列号。 每个记录包括一个或多个更改原因,指定相关文件发生的动作类型。 在记录中存在关闭文件更改原因意味着记录包括在前一个文件会话中对文件所做的所有显着更改,该更改被定义为在上次关闭文件更改原因输入后发生的时间 更改记录,直到下一个成功关闭文件更改原因的时间。 对于每个文件,在存储卷的主文件表中引用了一个引用变更记录的条目,该更改记录当前包含有关文件更改原因状态的最新信息。
    • 2. 发明授权
    • File system primitive providing native file system support for remote
storage
    • 文件系统原语为远程存储提供本地文件系统支持
    • US5978815A
    • 1999-11-02
    • US874787
    • 1997-06-13
    • Luis Felipe CabreraGary D. KimuraThomas J. MillerBrian D. Andrew
    • Luis Felipe CabreraGary D. KimuraThomas J. MillerBrian D. Andrew
    • G06F3/06G06F12/00G06F13/10G06F17/30
    • G06F3/0626G06F13/102G06F3/0643G06F3/067Y10S707/99955
    • In order to decrease the overall cost of storing large amounts of data, systems have been developed that use a hierarchy of storage devices from fast local disks to archival off-line storage. Such storage devices may be managed in a hierarchy where data that is accessed only infrequently can be moved to archival storage. The present invention relies on a tight integration of a hierarchical storage manager into the I/O system so that remotely stored attributes can be identified and tracked internally to the I/O system just like any other attributes. Implementations of the present invention may rely on a layered driver model where lower level drivers detect the existence of files with remotely stored attributes and then transfer control for processing I/O requests involving files with remotely stored attributes to higher level drivers. The higher level drivers then assume control to finish processing the I/O request.
    • 为了降低存储大量数据的总体成本,已经开发出使用快速本地磁盘的存储设备的层次结构来归档离线存储的系统。 这样的存储设备可以以不经常访问的数据被移动到档案存储的层次结构来管理。 本发明依赖于将分层存储管理器紧密集成到I / O系统中,使得远程存储的属性可以像其他任何属性一样在I / O系统内部被识别和跟踪。 本发明的实现可以依赖于分层驱动器模型,其中较低级别的驱动程序检测到具有远程存储的属性的文件的存在,然后传送控制以将涉及具有远程存储的属性的文件的I / O请求处理到较高级别的驱动程序。 然后,较高级别的驱动程序将控制完成处理I / O请求。
    • 4. 发明授权
    • Native data signatures in a file system
    • 文件系统中的原生数据签名
    • US5978814A
    • 1999-11-02
    • US10097
    • 1998-01-21
    • Thomas J. MillerLuis Felipe Cabrera
    • Thomas J. MillerLuis Felipe Cabrera
    • G06F12/00G06F17/30
    • G06F17/30097Y10S707/99954
    • The present invention provides reliable systems and methods for rapidly determining whether file data streams are the same, or different, without having to make a comparison between the actual data streams. If the determination is made that the data streams are different, the present invention can rapidly determine where the changes between the data streams occur, again, without having to actually compare the entire size of the data streams. Such methods and systems are accomplished by generating a native data signature (NDS) for each data stream stored by the file system, wherein each NDS is substantially smaller in size as compared to the data stream corresponding thereto. The NDS is generated by separating the data stream into a plurality of allocation units, ranging in size from 4K bytes to 256K bytes; by generating a unique change identifier (UCI), one per each allocation unit; and by assembling the UCIs into a series of bits, typically ranging up to, and including, 64 in number. Thus, even with a UCI having 64 bits, time efficiency for comparing data streams by comparing between NDSs is improved on the order of 500:1 or 32,000:1, depending upon the size of the allocation unit.
    • 本发明提供用于快速确定文件数据流是相同还是不同的可靠的系统和方法,而不必对实际的数据流进行比较。 如果确定数据流不同,则本发明可以快速地确定数据流之间的变化在何处发生,而不必实际地比较数据流的整体大小。 通过为由文件系统存储的每个数据流生成本地数据签名(NDS)来实现这样的方法和系统,其中与对应于其的数据流相比,每个NDS的大小显着更小。 通过将数据流分离成大小从4K字节到256K字节的多个分配单元来生成NDS; 通过生成唯一的改变标识符(UCI),每个分配单元一个; 并且通过将UCI组装成一系列位,通常范围达到并包括数量的64。 因此,即使具有64位的UCI,取决于分配单元的大小,用于通过NDS之间的比较来比较数据流的时间效率提高了大约500:1或32,000:1。
    • 6. 发明授权
    • Method and system for accessing a file using file names having different
file name formats
    • 使用不同文件名格式的文件名访问文件的方法和系统
    • US5745902A
    • 1998-04-28
    • US909984
    • 1992-07-06
    • Thomas J. MillerGary D. Kimura
    • Thomas J. MillerGary D. Kimura
    • G06F12/00G06F17/30
    • G06F17/30123G06F17/30179Y10S707/99933
    • A multiple file name referencing system stores multiple file names in a file. These multiple file names include an operating system formatted file name and an application formatted file name. When an operating system formatted file name is created or renamed, the multiple file name referencing system automatically generates an application formatted file name having a potentially different format from, but preserving the extension of, the operating system formatted name. The multiple file name referencing system similarly generates an operating system formatted name upon creation or renaming of an application formatted name. A B-tree is provided which contains an operating system entry for the operating system formatted name and an application entry for the application formatted name, each entry containing the address of the same file to which both names refer. The multiple file name referencing system converts the operating system formatted file name to the application formatted file name by accessing the B-tree with reference to the operating system entry, and vice versa. As a result, either file name can be used to directly reference the file without requiring additional file name translation.
    • 多文件名引用系统在文件中存储多个文件名。 这些多个文件名包括操作系统格式的文件名和应用程序格式的文件名。 当创建或重命名操作系统格式的文件名时,多个文件名引用系统自动生成具有与操作系统格式化名称有可能不同格式的应用程序格式化文件名,但保留扩展名。 在创建或重命名应用程序格式化名称时,多个文件名引用系统类似地生成操作系统格式的名称。 提供了一个B树,其中包含操作系统格式化名称的操作系统条目和应用程序格式化名称的应用条目,每个条目都包含两个名称引用的相同文件的地址。 多个文件名引用系统通过参考操作系统条目访问B-tree将操作系统格式的文件名转换为应用程序格式的文件名,反之亦然。 因此,任何文件名都可用于直接引用该文件,而不需要额外的文件名转换。