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    • 3. 发明申请
    • Method of Adapting a Uniform Access Indexing Process to a Non-Uniform Access Memory, and Computer System
    • 将均匀访问索引过程适用于非统一访问存储器和计算机系统的方法
    • US20150039907A1
    • 2015-02-05
    • US14519722
    • 2014-10-21
    • SimpliVity Corporation
    • Paul BowdenArthur J. Beaverson
    • G06F12/10G06F12/02G06F12/14G06F12/08
    • G06F12/1054G06F12/0246G06F12/0864G06F12/0875G06F12/1408G06F17/30097G06F17/30949G06F17/30952G06F2212/2542G06F2212/402G06F2212/452G06F2212/502G06F2212/6032G06F2212/7211
    • Method and apparatus for constructing an index that scales to a large number of records and provides a high transaction rate. New data structures and methods are provided to ensure that an indexing algorithm performs in a way that is natural (efficient) to the algorithm, while a non-uniform access memory device sees IO (input/output) traffic that is efficient for the memory device. One data structure, a translation table, is created that maps logical buckets as viewed by the indexing algorithm to physical buckets on the memory device. This mapping is such that write performance to non-uniform access SSD and flash devices is enhanced. Another data structure, an associative cache is used to collect buckets and write them out sequentially to the memory device as large sequential writes. Methods are used to populate the cache with buckets (of records) that are required by the indexing algorithm. Additional buckets may be read from the memory device to cache during a demand read, or by a scavenging process, to facilitate the generation of free erase blocks.
    • 用于构建扩展到大量记录并提供高交易速度的索引的方法和装置。 提供新的数据结构和方法以确保索引算法以对于算法是自然(有效的)的方式执行,而非均匀访问存储器设备看到对存储器件有效的IO(输入/输出)流量 。 创建一个数据结构,一个翻译表,将由索引算法查看的逻辑桶映射到存储设备上的物理桶。 这种映射使得对非均匀访问SSD和闪存设备的写入性能得到增强。 另一种数据结构,关联高速缓存用于收集桶并将其按顺序写入存储器设备,作为大量的顺序写入。 方法用于使用索引算法所需的桶(记录)来填充高速缓存。 可以在需求读取期间或通过扫描过程从存储器件读取额外的存储桶以进行高速缓存,以便于生成可用的擦除块。