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    • 1. 发明申请
    • Software upgrade and downgrade in systems with persistent data
    • 具有持久性数据的系统中的软件升级和降级
    • US20050114853A1
    • 2005-05-26
    • US10723085
    • 2003-11-26
    • Joseph GliderArchana Samtani
    • Joseph GliderArchana Samtani
    • G06F9/445G06F9/44
    • G06F8/60
    • Disclosed is a system, method, and program storage device implanting the method for revising a software application wherein the software application utilizes persistent data, comprising applying an upgrade to a first next level of software that understands both old and new persistent data structure formats; converting all persistent data structures into the old persistent data structure format; applying an upgrade to a second next level of software that understands the old and new persistent data structure formats; converting all persistent data structures into the new persistent data structure format; applying a downgrade to a first previous level of software that understands both the old and new persistent data structure formats; converting all persistent data structures into the old persistent data structure format; and applying a downgrade to a second previous level of software that understands the old persistent data structure formats.
    • 公开了一种植入用于修改软件应用的方法的系统,方法和程序存储设备,其中软件应用利用持久数据,包括将升级应用于理解旧的和新的持久数据结构格式的软件的第一下一级; 将所有持久性数据结构转换为旧的持久数据结构格式; 将升级应用于了解新旧持久性数据结构格式的第二级软件; 将所有持久性数据结构转换为新的持久数据结构格式; 将降级应用于了解旧的和新的持久数据结构格式的软件的第一个先前级别; 将所有持久性数据结构转换为旧的持久数据结构格式; 并将降级应用于理解旧的持久性数据结构格式的软件的第二级别。
    • 2. 发明申请
    • Storage system and method for prestaging data in a cache for improved performance
    • 存储系统和方法,用于在缓存中预测数据以提高性能
    • US20050050279A1
    • 2005-03-03
    • US10652997
    • 2003-08-29
    • Lawrence ChiuArchana Samtani
    • Lawrence ChiuArchana Samtani
    • G06F12/08G06F12/00
    • G06F12/0862G06F12/0866G06F2212/6024
    • A storage system and method for prestaging data in a cache based on relative changes in the frequency of data access and relative changes in the effectiveness of previous prestage operations. The relative changes in the frequency of data access are determined by storing statistics of data access to all regions in the system and comparing recent access statistics to the stored data. Access statistics include data location, I/O size and access frequency. The relative changes in the effectiveness of previous prestage operations are detected by recording the number of previous prestaging operations for a region, recording the number of I/O requests for data that has been prestaged, and dividing the number of I/O requests for previously prestaged data in a region during a time period by the number of previous prestage operations for the region during the same time.
    • 一种存储系统和方法,用于基于数据访问频率的相对变化以及先前预处理操作的有效性的相对变化来预读高速缓存中的数据。 通过将数据访问的统计信息存储到系统中的所有区域并将最近的访问统计信息与存储的数据进行比较来确定数据访问频率的相对变化。 访问统计信息包括数据位置,I / O大小和访问频率。 通过记录一个区域的先前的预处理操作的数量,记录已经预先存储的数据的I / O请求的数量,以及之前划分的I / O请求的数量来检测先前的前级操作的有效性的相对变化 在一段时间内,区域中的预先存储的数据在同一时间内该区域的先前预置操作的数量。