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1. 发明授权

US5608890A Data set level cache optimization 失效
标题翻译：数据集级缓存优化
公开(公告)号：US5608890A
公开(公告)日：1997-03-04
申请号：US417631
申请日：1995-04-06
申请人： Jeffrey A. Berger , Stanley C. Kurtz
发明人： Jeffrey A. Berger , Stanley C. Kurtz
IPC分类号： G06F12/08 , G06F12/00
CPC分类号： G06F12/0866 , G06F12/0888 , G06F2212/312
摘要： A method and means for dynamically managing access by data sets to an LRU disciplined DASD cache staging data sets. A threshold utilizes the inverse of slowly varying global hit ratios (ST) taken over a large number of data sets to control the access by individual data sets in cache as measured by their local hit ratios (DSHR). After an initial trial period, a data set is allowed access to the cache only where DSHR>ST. The method and means are self adjusting in that as I/O demand changes, ST also changes in phase such that an increase in aggregate demand for cache results in elimination of data sets whose DSHRs were marginally equal to the old ST and now less than the new ST. Utilization of a DASD Fast Write and non-volatile store (NVS) can be managed similarly if coordinated with the cache and maintenance of both a global WRITE threshold (WR), local data set write hit ratio (DSHRW), and invocation of Fast Write only where DSHRW>WT (write threshold).
摘要翻译：一种用于动态管理数据集对LRU有序DASD缓存分级数据集的访问的方法和装置。门限利用了大量数据集中缓慢变化的全局命中率（ST）的逆，以通过其本地命中率（DSHR）来测量缓存中的各个数据集的访问。初始试用期后，只允许在DSHR> ST访问数据集。该方法和手段是自调整的，因为随着I / O需求的变化，ST也在相位上变化，使得缓存的总需求的增加导致数据集的消除，其DSHR略微等于旧ST，现在小于新ST 如果与高速缓存和全局写入阈值（WR），本地数据集写入命中率（DSHRW）以及快速写入的调用（DSHRW）保持一致，则可以类似地管理DASD快速写入和非易失性存储（NVS）的使用只有DSHRW> WT（写阈值）。

2. 发明授权

US5499354A Method and means for dynamic cache management by variable space and time binding and rebinding of cache extents to DASD cylinders 失效
标题翻译：通过可变空间进行动态缓存管理的方法和方法，并将缓存区段的时间绑定和重新绑定到DASD气瓶
公开(公告)号：US5499354A
公开(公告)日：1996-03-12
申请号：US64295
申请日：1993-05-19
申请人： John G. Aschoff , Jeffrey A. Berger , David A. Burton , Bruce McNutt , Stanley C. Kurtz
发明人： John G. Aschoff , Jeffrey A. Berger , David A. Burton , Bruce McNutt , Stanley C. Kurtz
IPC分类号： G06F12/08 , G06F12/02
CPC分类号： G06F12/0866 , G06F2212/312
摘要： Dynamic allocation of read cache space is allocated among bands of DASD cylinders rather than to data sets or processes as a function of a weighted average hit ratio to the counterpart cache space. Upon the hit ratio falling below a predetermined threshold, the bands are disabled for a defined interval as measured by cache accesses and then rebound to cache space again.
摘要翻译：读取高速缓存空间的动态分配在DASD气缸的频带之间分配，而不是数据集或进程作为与对方高速缓存空间的加权平均命中率的函数。当命中率下降到预定阈值以下时，通过高速缓存访问测量的频带被禁用定义的间隔，然后再次反弹到高速缓存空间。

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