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    • 3. 发明申请
    • Distributing data across multiple storage devices
    • 在多个存储设备上分发数据
    • US20050262038A1
    • 2005-11-24
    • US10848845
    • 2004-05-18
    • Thomas SepezWilliam Bridge
    • Thomas SepezWilliam Bridge
    • G06F3/06G06F7/00
    • G06F3/0658G06F3/0608G06F3/061G06F3/067
    • Pieces of data are stored among storage devices based on a cycle value, which is computed for each storage device as the total capacity of all storage devices divided by the individual capacity of the storage device. Next, a storage device for a current piece of data is selected to be the storage device with the smallest key value; followed by determination of a new key value based on at least (a) the cycle value and (b) a sequence number of the current piece. After allocation, if the number of storage devices changes, reallocation is done similarly except that selection is first from a preferred set and only if the preferred set is empty then from a remainder set. Storage devices are placed in the preferred set if a piece of data would be outside a shadow (based on cycle value) of another piece pre-existing in the storage device.
    • 基于对于每个存储设备计算的周期值,存储数据的数据作为所有存储设备的总容量除以存储设备的个别容量。 接下来,将用于当前数据的存储装置选择为具有最小键值的存储装置; 然后基于至少(a)周期值和(b)当前片段的序列号来确定新的键值。 分配后,如果存储设备的数量发生变化,则重新分配的操作类似,除了先选择首选集,只有首选集为空,然后再从剩余集中移除。 如果一条数据将在存储设备中预先存在的另一个部件的阴影(基于周期值)之外,则将存储设备放置在首选组中。
    • 4. 发明授权
    • Method and apparatus for identifying files used to restore a file
    • 用于识别用于恢复文件的文件的方法和装置
    • US6073128A
    • 2000-06-06
    • US962087
    • 1997-10-31
    • Gregory PongraczSteven WertheimerWilliam Bridge
    • Gregory PongraczSteven WertheimerWilliam Bridge
    • G06F17/30
    • G06F11/1469Y10S707/99933Y10S707/99943Y10S707/99952Y10S707/99953
    • A method and apparatus identifies backup files that will restore a file in a transactional system. A reset stamp and filename is used to identify all backup files of the file having the filename since the file was last restored. A smaller number of files necessary to restore the file are selected from these backup files by sorting the list of files and selecting certain files in sort order. If necessary, earlier reset stamps are identified and more files are identified and selected, until a file is selected that contains a full backup or datafile copy of the file. For the backup files selected, information such as the location of the file is stored in the order in which the backup files are selected. The information, such as the location of each file selected, is provided in an order that is the reverse of the order in which the files were selected so that the oldest file is listed first. The files may be restored in the order provided.
    • 一种方法和装置识别将在事务系统中恢复文件的备份文件。 自上次恢复文件以来,使用重置戳记和文件名来标识具有文件名的文件的所有备份文件。 通过排序文件列表并按排序顺序选择某些文件,从这些备份文件中选择要还原文件所需的较少数量的文件。 如有必要,可以识别早期的重置标记,并识别和选择更多的文件,直到选择了包含文件的完整备份或数据文件副本的文件。 对于选择的备份文件,按照选择备份文件的顺序存储文件位置等信息。 所选择的每个文件的位置等信息按照与选择文件顺序相反的顺序提供,以便最早列出文件。 可以按照提供的顺序恢复文件。
    • 10. 发明授权
    • Resource management using resource domains
    • 资源管理使用资源域
    • US06385613B1
    • 2002-05-07
    • US09272980
    • 1999-03-19
    • Patricia GrewellTerry N. HayesWilliam BridgeHans Karten
    • Patricia GrewellTerry N. HayesWilliam BridgeHans Karten
    • G06F1730
    • G06F9/52Y10S707/99938Y10S707/99953
    • A method and apparatus for managing access to resources is provided. When a process requires access to a resource, the process requests a lock on the resource from a lock manager unit that resides on the same node as the process. If a resource object for the resource does not exists, one is created in the lock manager unit, but not on lock manager units on other nodes. Because each lock manager unit does not have to store all resource objects, and resource objects are only created for resources that are actually used, the overhead of the lock management system is significantly reduced. Resources are grouped in recovery domains. When a lock manager unit that supported a recovery domain fails, the recovery domain is marked invalid. All resources in the recovery domain are considered invalid unless it would have been impossible for a failed instance to have held an exclusive lock on the resource. A snapshot of lock information is made before cleanup is performed on invalid resources. After cleanup, the snapshot is used to determine which resources were cleaned up.
    • 提供了一种用于管理资源访问的方法和装置。 当一个进程需要访问一个资源时,该进程从驻留在与进程相同的节点上的锁管理器单元请求对资源的锁定。 如果资源的资源对象不存在,则在锁管理器单元中创建一个资源对象,但不在其他节点上的锁管理器单元上创建。 因为每个锁管理器单元不必存储所有的资源对象,而是仅为实际使用的资源创建资源对象,所以锁管理系统的开销显着降低。 资源分组在恢复域中。 当支持恢复域的锁管理器单元失败时,恢复域被标记为无效。 恢复域中的所有资源都被视为无效,除非失败的实例不可能对资源进行排他锁。 在对无效资源执行清理之前,将进行锁定信息的快照。 清理后,快照用于确定清理哪些资源。