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    • 4. 发明授权
    • Method for minimizing lock processing while ensuring consistency among
pages common to local processor caches and a shared external store
    • 最小化锁处理同时确保本地处理器高速缓存和共享外部存储共享的页面之间的一致性的方法
    • US5301290A
    • 1994-04-05
    • US493562
    • 1990-03-14
    • William H. TetzlaffJay H. Unger
    • William H. TetzlaffJay H. Unger
    • G06F12/00G06F12/08G06F12/14
    • G06F12/0815
    • A computer implemented method for minimizing the grant of pages locks and the number of outstanding locks while ensuring consistency of the copies of pages resident among a first, and a second data cache with the original pages in shared external storage. A first processor requesting a lock on a designated page is granted a lock over the group of pages including the designated page in the absence of a concurrent lock to the page or group held by another processor. Any changed page is copied through to external storage. Otherwise, a processor intending to alter a page causes a global lock manager to notify concurrent lock holders, invalidate copies of the page in their local caches, and obtain an exclusive lock to the requesting process for the duration of its operation on the page. After this the lock is demoted to share and the changed page also copied through to external storage.
    • 一种计算机实现的方法,用于最小化页面锁定的授予和未完成的锁定数量,同时确保驻留在第一和第二数据高速缓存中的页面的副本与共享外部存储器中的原始页面的一致性。 在没有对另一处理器所保持的页面或组的并发锁定的情况下,在指定页面上请求锁定的第一处理器被授予包括指定页面的页面组的锁定。 任何已更改的页面都将复制到外部存储。 否则,打算更改页面的处理器会导致全局锁管理器通知并发锁持有者,使其本地缓存中的页面的副本无效,并在该页面上操作的持续时间内获取对请求进程的排他锁。 之后,锁定被降级分享,更改的页面也被复制到外部存储。
    • 8. 发明授权
    • Method for determining load capacity by grouping physical components
into logical components whose loads represent fixed proportional loads
of physical components
    • 通过将物理组件分组成其负载表示物理组件的固定比例负载的逻辑组件来确定负载容量的方法
    • US5768520A
    • 1998-06-16
    • US593597
    • 1996-01-29
    • Asit DanMartin G. KienzleDinkar SitaramWilliam H. Tetzlaff
    • Asit DanMartin G. KienzleDinkar SitaramWilliam H. Tetzlaff
    • G06F9/50G06F15/16
    • G06F9/5083
    • A system and method are provided for determining load capacity of a system. Physical components of the system and their interconnection are identified. The physical components are converted into logical components such that at least one logical component is created by grouping a plurality of the physical components and such that a load on the logical component will result in an approximately fixed proportional load on the plurality of physical components. Links between the logical components and a proportion of the load placed on each link between a source and destination pair are determined. A model of the logical components and interconnection of the logical components in is then stored in an electronically accessible data structure formed in a memory. A system and method for determining a path for routing data between a source and a destination pair in a system are also provided. An interconnection model of logical system components and logical links is provided wherein the model reflects the saturation capacity of each of the logical system components and each of the logical links. The bandwidth required for providing the data is determined. Then, by reference to the model, a path between the source and destination pair is selected that would not saturate any of the logical system components and logical links when providing the data. System capacity is then reserved by altering the model to reflect the load on the system components that would be required by providing the data from the source to the destination by way of the selected path.
    • 提供了用于确定系统的负载能力的系统和方法。 识别系统的物理组件及其互连。 物理组件被转换成逻辑组件,使得通过对多个物理组件进行分组而创建至少一个逻辑组件,并且使得逻辑组件上的负载将导致对多个物理组件的大致固定的比例负载。 确定逻辑组件之间的链接和放置在源和目的地对之间的每个链路上的负载的一部分。 然后将逻辑组件的逻辑组件和互连的模型存储在形成在存储器中的电子可访问数据结构中。 还提供了用于确定用于在系统中的源和目的地对之间路由数据的路径的系统和方法。 提供了逻辑系统组件和逻辑链路的互连模型,其中模型反映了每个逻辑系统组件和每个逻辑链路的饱和容量。 确定提供数据所需的带宽。 然后,通过参考模型,选择源和目标对之间的路径,当提供数据时,不会使任何逻辑系统组件和逻辑链路饱和。 然后通过更改模型来保留系统容量,以反映通过所选路径将数据从源提供到目的地所需的系统组件的负载。