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    2.
    发明专利
    未知

    公开(公告)号：DE60129025D1

    公开(公告)日：2007-08-02

    申请号：DE60129025

    申请日：2001-08-17

    Applicant: NETWORK APPLIANCE INC

    Inventor： DOUCETTE DOUGLAS P ,  LEWIS BLAKE ,  EDWARDS JOHN K

    IPC: G06F3/06 ,  G06F17/30

    Abstract: A file system determines the relative vacancy of a collection of storage blocks, i.e., an “allocation area”. This is accomplished by recording an array of numbers, each of which describes the vacancy of a collection of storage blocks. The file system examines these numbers when attempting to record file blocks in relatively contiguous areas on a storage medium, such as a disk. When a request to write to disk occurs, the system determines the average vacancy of all of the allocation areas and queries the allocation areas for individual vacancy rates. The system preferably writes file blocks to the allocation areas that are above a threshold related to the average storage block vacancy of the file system.

    INSTANT SNAPSHOT
    3.
    发明申请
    INSTANT SNAPSHOT 审中-公开
    即时快照

    公开(公告)号：WO0229573A3

    公开(公告)日：2002-07-11

    申请号：PCT/US0125763

    申请日：2001-08-17

    Applicant: NETWORK APPLIANCE INC

    Inventor： LEWIS BLAKE ,  EDWARDS JOHN K ,  VISWANATHAN SRINIVASAN

    IPC: G06F11/14

    CPC classification number: G06F11/14 ,  G06F11/1435 ,  G06F2201/84 ,  Y10S707/99931 ,  Y10S707/99956

    Abstract: The invention provides an improved method and apparatus for creating a snapshot of a file system. In a first aspect of the invention, a "copy-on-write" mechanism is used. An effective snapshot mechanism must be efficient both in its use of storage space and in the time needed to create it because file systems are often large. The snapshot uses the same blocks as the active file system until the active file system is modified. Whenever a modification occurs, the modified data is copied to a new block and the old data is saved (henceforth called "copy-on-write". In this way, the snapshot only uses space where it differs from the active file system, and the amount of work required to create the snapshot is small. In a second aspect of the invention, a record of which blocks are being used by the snapshot is included in the snapshot itself, allowing effectively instantaneous snapshot creation and deletion.

    Abstract translation: 本发明提供了一种用于创建文件系统的快照的改进的方法和装置。 在本发明的第一方面中，使用“写入时复制”机制。 有效的快照机制在使用存储空间和创建它所需的时间内都必须高效，因为文件系统通常很大。 快照使用与活动文件系统相同的块，直到活动文件系统被修改。 每当修改发生时，修改后的数据将被复制到一个新的块中，并保存旧的数据（以下称为“写入时复制”）。这样，快照仅使用与活动文件系统不同的空间，并且 创建快照所需的工作量很小在本发明的第二方面，快照正在使用哪些块正在被快照使用的记录，其允许快速创建和删除瞬间快照。

    INSTANT SNAPSHOT
    6.
    发明申请
    INSTANT SNAPSHOT 审中-公开
    即时通知

    公开(公告)号：WO0229573B1

    公开(公告)日：2002-11-14

    申请号：PCT/US0125763

    申请日：2001-08-17

    Applicant: NETWORK APPLIANCE INC

    Inventor： LEWIS BLAKE ,  EDWARDS JOHN K ,  VISWANATHAN SRINIVASAN

    IPC: G06F11/14

    CPC classification number: G06F11/14 ,  G06F11/1435 ,  G06F2201/84 ,  Y10S707/99931 ,  Y10S707/99956

    Abstract: The invention provides an improved method and apparatus for creating a snapshot of a file system. In a first aspect of the invention, a "copy-on-write" mechanism is used. An effective snapshot mechanism must be efficient both in its use of storage space and in the time needed to create it because file systems are often large. The snapshot uses the same blocks as the active file system until the active file system is modified. Whenever a modification occurs, the modified data is copied to a new block and the old data is saved (henceforth called "copy-on-write". In this way, the snapshot only uses space where it differs from the active file system, and the amount of work required to create the snapshot is small. In a second aspect of the invention, a record of which blocks are being used by the snapshot is included in the snapshot itself, allowing effectively instantaneous snapshot creation and deletion.

    Abstract translation: 本发明提供了一种用于创建文件系统的快照的改进的方法和装置。 在本发明的第一方面中，使用“写时复制”机制。 有效的快照机制在使用存储空间以及创建时所需的时间必须要高效，因为文件系统通常很大。 快照使用与活动文件系统相同的块，直到活动文件系统被修改为止。 每当修改发生时，修改的数据被复制到新的块，并且保存旧数据（以下称为“写时复制”，这样，快照只使用与活动文件系统不同的空间， 创建快照所需的工作量很小。在本发明的第二方面，快照中使用哪些块的记录被包括在快照本身中，从而有效地即时创建和删除快照。

    IMPROVED SPACE ALLOCATION IN A WRITE ANYWHERE FILE SYSTEM
    7.
    发明申请
    IMPROVED SPACE ALLOCATION IN A WRITE ANYWHERE FILE SYSTEM 审中-公开
    在任何文件系统中改进空间分配

    公开(公告)号：WO0217057A3

    公开(公告)日：2003-03-20

    申请号：PCT/US0125822

    申请日：2001-08-17

    Applicant: NETWORK APPLIANCE INC

    Inventor： DOUCETTE DOUGLAS P ,  LEWIS BLAKE ,  EDWARDS JOHN K

    IPC: G06F3/06 ,  G06F17/30 ,  G06F11/14 ,  G06F12/02

    CPC classification number: G06F3/0605 ,  G06F3/0608 ,  G06F3/0631 ,  G06F3/0643 ,  G06F3/0644 ,  G06F3/0689 ,  G06F17/30067 ,  Y10S707/99943 ,  Y10S707/99952 ,  Y10S707/99953 ,  Y10S707/99956

    Abstract: The invention provides a method and system for improving data access of a reliable file system. In a first aspect of the invention, the file system determines the relative vacancy of a collection of storage blocks, herein called an "allocation area". This is accomplished by recording an array of binary numbers. Each binary number in the array describes the vacancy of a collection of storage blocks. The file system examines these binary numbers when attempting to record file blocks in relatively contiguous areas on a storage medium, such as a hard disk. When a request to write to disk occurs, the system determines the average vacancy of all the allocation areas and queries the allocation areas for individual vacancy rates such as sequentially. The system preferably writes file blocks to the allocation areas that are above a threshold related to the average storage block vacancy of the file system. If the file in the request to write is larger than the selected allocation area, the next allocation area above the threshold is preferably used to write the remaining blocks of the file.

    Abstract translation: 本发明提供了一种用于改善可靠文件系统的数据访问的方法和系统。 在本发明的第一方面，文件系统确定存储块集合的相对空位，这里称为“分配区域”。 这是通过记录二进制数字的数组来实现的。 阵列中的每个二进制数字描述了存储块集合的空位。 当尝试在诸如硬盘的存储介质上的相对连续的区域中记录文件块时，文件系统检查这些二进制数。 当写入磁盘的请求发生时，系统确定所有分配区域的平均空缺，并查询单个空缺率的分配区域，如顺序。 系统优选地将文件块写入高于与文件系统的平均存储块空缺相关的阈值的分配区域。 如果写入请求中的文件大于所选择的分配区域，则优选地使用高于阈值的下一个分配区域来写入文件的剩余块。

    8.
    发明专利
    未知

    公开(公告)号：DE60129025T2

    公开(公告)日：2008-02-21

    申请号：DE60129025

    申请日：2001-08-17

    Applicant: NETWORK APPLIANCE INC

    Inventor： DOUCETTE DOUGLAS P ,  LEWIS BLAKE ,  EDWARDS JOHN K

    IPC: G06F3/06 ,  G06F17/30

    Abstract: A file system determines the relative vacancy of a collection of storage blocks, i.e., an “allocation area”. This is accomplished by recording an array of numbers, each of which describes the vacancy of a collection of storage blocks. The file system examines these numbers when attempting to record file blocks in relatively contiguous areas on a storage medium, such as a disk. When a request to write to disk occurs, the system determines the average vacancy of all of the allocation areas and queries the allocation areas for individual vacancy rates. The system preferably writes file blocks to the allocation areas that are above a threshold related to the average storage block vacancy of the file system.

    MULTIPLE CONCURRENT ACTIVE FILE SYSTEMS
    10.
    发明公开
    MULTIPLE CONCURRENT ACTIVE FILE SYSTEMS 有权
    多个同时活动的文件系统

    公开(公告)号：EP1535198A4

    公开(公告)日：2007-05-16

    申请号：EP03757323

    申请日：2003-06-03

    Applicant: NETWORK APPLIANCE INC

    Inventor： HITZ DAVID ,  EDWARDS JOHN ,  LEWIS BLAKE

    IPC: G06F12/00 ,  G06F17/30

    CPC classification number: G06F17/30067 ,  G06F2201/84 ,  Y10S707/99931 ,  Y10S707/99938 ,  Y10S707/99952 ,  Y10S707/99953

    Abstract: Maintenance of plural active file systems (100), wherein each of the active file systems initially access data (120) with another of the active file systems, and wherein changes made to each of the active file systems are not reflected in other active file systems. When a second active file system is created based on a first active file system, the first active file system and the second active file system initially share data. When changes are made to the first active file system, modified data is recorded in the first active file system in a location that is not shared with the second active file system in a location that is not shared with the second active file system. When changes are made to the second active file system, modified data is recorded in the second active file system in a location that is not shared with the first active file system. Also, creation of the plural active file systems.

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