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    Directly mapped buffer cache on non-volatile memory
    1.
    发明授权
    Directly mapped buffer cache on non-volatile memory 有权

    公开(公告)号：US11256627B2

    公开(公告)日：2022-02-22

    申请号：US16907703

    申请日：2020-06-22

    Applicant: Oracle International Corporation

    Inventor： Juan R. Loaiza ,  J. William Lee ,  Wei-Ming Hu ,  Kothanda Umamageswaran ,  Neil J. S. MacNaughton ,  Adam Y. Lee

    IPC: G06F12/0873 ,  G06F12/0868 ,  G06F12/0866 ,  G06F16/13 ,  G06F16/172

    Abstract: A method and an apparatus for implementing a buffer cache for a persistent file system in a non-volatile memory is provided. A set of data is maintained in one or more extents in a non-volatile random-access memory (NVRAM) of a computing device. At least one buffer header is allocated in a dynamic random-access memory (DRAM) of the computing device. In response to a read request by a first process executing on the computing device to access one or more first data blocks in a first extent of the one or more extents, the first process is granted direct read access of the first extent in the NVRAM. A reference to the first extent in the NVRAM is stored in a first buffer header. The first buffer header is associated with the first process. The first process uses the first buffer header to directly access the one or more first data blocks in the NVRAM.

    DIRECTLY MAPPED BUFFER CACHE ON NON-VOLATILE MEMORY
    2.
    发明申请
    DIRECTLY MAPPED BUFFER CACHE ON NON-VOLATILE MEMORY 审中-公开

    公开(公告)号：US20190065383A1

    公开(公告)日：2019-02-28

    申请号：US15693273

    申请日：2017-08-31

    Applicant: Oracle International Corporation

    Inventor： Juan R. Loaiza ,  J. William Lee ,  Wei-Ming Hu ,  Kothanda Umamageswaran ,  Neil J.S. MacNaughton ,  Adam Y. Lee

    IPC: G06F12/0873 ,  G06F17/30

    Abstract: A method and apparatus for implementing a buffer cache for a persistent file system in non-volatile memory is provided. A set of data is maintained in one or more extents in non-volatile random-access memory (NVRAM) of a computing device. At least one buffer header is allocated in dynamic random-access memory (DRAM) of the computing device. In response to a read request by a first process executing on the computing device to access one or more first data blocks in a first extent of the one or more extents, the first process is granted direct read access of the first extent in NVRAM. A reference to the first extent in NVRAM is stored in a first buffer header. The first buffer header is associated with the first process. The first process uses the first buffer header to directly access the one or more first data blocks in NVRAM.

    DIRECTLY MAPPED BUFFER CACHE ON NON-VOLATILE MEMORY
    6.
    发明申请
    DIRECTLY MAPPED BUFFER CACHE ON NON-VOLATILE MEMORY 审中-公开

    公开(公告)号：US20200320010A1

    公开(公告)日：2020-10-08

    申请号：US16907703

    申请日：2020-06-22

    Applicant: Oracle International Corporation

    Inventor： Juan R. Loaiza ,  J. William Lee ,  Wei-Ming Hu ,  Kothanda Umamageswaran ,  Neil J.S. MacNaughton ,  Adam Y. Lee

    IPC: G06F12/0873 ,  G06F16/13 ,  G06F16/172 ,  G06F12/0868 ,  G06F12/0866

    Abstract: A method and apparatus for implementing a buffer cache for a persistent file system in non-volatile memory is provided. A set of data is maintained in one or more extents in non-volatile random-access memory (NVRAM) of a computing device. At least one buffer header is allocated in dynamic random-access memory (DRAM) of the computing device. In response to a read request by a first process executing on the computing device to access one or more first data blocks in a first extent of the one or more extents, the first process is granted direct read access of the first extent in NVRAM. A reference to the first extent in NVRAM is stored in a first buffer header. The first buffer header is associated with the first process. The first process uses the first buffer header to directly access the one or more first data blocks in NVRAM.

    Caching Large Objects In A Computer System With Mixed Data Warehousing And Online Transaction Processing Workload
    8.
    发明申请
    Caching Large Objects In A Computer System With Mixed Data Warehousing And Online Transaction Processing Workload 审中-公开
    在具有混合数据仓库和在线事务处理工作负载的计算机系统中缓存大对象

    公开(公告)号：US20140095802A1

    公开(公告)日：2014-04-03

    申请号：US13831462

    申请日：2013-03-14

    Applicant: ORACLE INTERNATIONAL CORPORATION

    Inventor： Adam Y. Lee ,  J. William Lee ,  Dmitry Mikhailovich Potapov ,  Neil MacNaughton ,  Vipin Gokhale ,  Bharat Chandra Baddepudi ,  David Vengerov

    IPC: G06F12/12

    CPC classification number: G06F12/128 ,  G06F12/126 ,  G06F16/24561

    Abstract: Techniques are provided for managing cached data objects in a mixed workload environment. In an embodiment, a database system receives request to access a target data object. The database system determines whether the request to access the target data object is associated with a first type of workload or a second type of workload. In response to determining that the request is associated with the first type of workload, the target data object replaces a least recently used data object in a cache. In response to determining that the request is associated with the second type of workload, the target data object is cached based on an associated access-level value.

    Abstract translation: 提供了在混合工作负载环境中管理缓存数据对象的技术。 在一个实施例中，数据库系统接收访问目标数据对象的请求。 数据库系统确定访问目标数据对象的请求是否与第一类工作负载或第二类工作负载相关联。 响应于确定该请求与第一类型的工作负载相关联，目标数据对象将替换高速缓存中最近最少使用的数据对象。 响应于确定该请求与第二类型的工作负载相关联，基于相关联的访问级别值来缓存目标数据对象。

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