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    NATIVE PERSISTENT STORE SUPPORT FOR BLOCKCHAINS
    34.
    发明申请
    NATIVE PERSISTENT STORE SUPPORT FOR BLOCKCHAINS 有权

    公开(公告)号：US20210034606A1

    公开(公告)日：2021-02-04

    申请号：US16932633

    申请日：2020-07-17

    Applicant: Oracle International Corporation

    Inventor： James W. Stamos ,  Mahesh Baburao Girkar ,  Wei Ming Hu ,  Juan R. Loaiza ,  Sachin Vijaykumar Sonawane ,  Hongjie Yang

    IPC: G06F16/23 ,  G06F16/21 ,  H04L9/06

    Abstract: Distributed ledgered data is stored within a distributed persistent storage system comprising multiple persistent storage systems as distributed ledgered participants. In various embodiments, the distributed ledgered data is maintained using the native capabilities of a persistent storage system. The distributed ledgered data is replicated as persistent data objects in a “ledgered repository of objects” that are replicated at each of the persistent storage systems. Changes at one persistent storage system are recorded within a block in a distributed blockchain that is distributed across each of the other distributed ledgered participants. The other distributed ledgered participants read the changes from the blockchain and apply the changes to the respective replicas at each of the other distributed ledgered participants. Hence, this approach is referred to as blockchain apply. Blockchain apply may be used to replicate the repository objects of various forms of PSSs. In a DBMS, a repository of objects is a table, where each record or row is an object in the repository. In a file system, a repository of objects is a directory, where each directory and file therein is an object in the repository. In a document storage system (DOCS), a repository of objects is a collection of documents, where each document is an object in the repository.

    DIRECTLY MAPPED BUFFER CACHE ON NON-VOLATILE MEMORY
    35.
    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.

    NV CACHE
    36.
    发明申请
    NV CACHE 审中-公开

    公开(公告)号：US20190102309A1

    公开(公告)日：2019-04-04

    申请号：US15720972

    申请日：2017-09-29

    Applicant: Oracle International Corporation

    Inventor： Zuoyu Tao ,  Jia Shi ,  Kothanda Umamageswaran ,  Juan R. Loaiza

    IPC: G06F12/0873 ,  G06F12/0871 ,  G06F12/0868 ,  G06F12/02 ,  G06F15/173 ,  G06F17/30

    Abstract: Data blocks are cached in a persistent cache (“NV cache”) allocated from as non-volatile RAM (“NVRAM”). The data blocks may be accessed in place in the NV cache of a “source” computing element by another “remote” computing element over a network using remote direct memory access (“RMDA”). In order for a remote computing element to access the data block in NV cache on a source computing element, the remote computing element needs the memory address of the data block within the NV cache. For this purpose, a hash table is stored and maintained in RAM on the source computing element. The hash table identifies the data blocks in the NV cache and specifies a location of the cached data block within the NV cache.

    Efficient data storage and retrieval using a heterogeneous main memory
    37.
    发明授权
    Efficient data storage and retrieval using a heterogeneous main memory 有权

    公开(公告)号：US10133667B2

    公开(公告)日：2018-11-20

    申请号：US15257754

    申请日：2016-09-06

    Applicant: Oracle International Corporation

    Inventor： Niloy Mukherjee ,  Tirthankar Lahiri ,  Juan R. Loaiza ,  Jesse Kamp ,  Prashant Gaharwar ,  Hariharan Lakshmanan ,  Dhruvil Shah

    IPC: G06F12/08 ,  G06F3/06 ,  G06F17/30

    Abstract: Techniques related to efficient data storage and retrieval using a heterogeneous main memory are disclosed. A database includes a set of persistent format (PF) data that is stored on persistent storage in a persistent format. The database is maintained on the persistent storage and is accessible to a database server. The database server converts the set of PF data to sets of mirror format (MF) data and stores the MF data in a hierarchy of random-access memories (RAMs). Each RAM in the hierarchy has an associated latency that is different from a latency associated with any other RAM in the hierarchy. Storing the sets of MF data in the hierarchy of RAMs includes (1) selecting, based on one or more criteria, a respective RAM in the hierarchy to store each set of MF data and (2) storing said each set of MF data in the respective RAM.

    STORAGE-SIDE STORAGE REQUEST MANAGEMENT
    39.
    发明申请
    STORAGE-SIDE STORAGE REQUEST MANAGEMENT 有权
    存储存储请求管理

    公开(公告)号：US20130339636A1

    公开(公告)日：2013-12-19

    申请号：US13971158

    申请日：2013-08-20

    Applicant: Oracle International Corporation

    Inventor： Sue K. Lee ,  Vivekananda C. Kolla ,  Akshay D. Shah ,  Sumanta Chatterjee ,  Margaret Susairaj ,  Juan R. Loaiza ,  Alexander Tsukerman ,  Sridhar Subramaniam

    IPC: G06F12/00

    CPC classification number: G06F17/30498 ,  G06F3/0611 ,  G06F3/0659 ,  G06F3/067 ,  G06F12/00 ,  G06F17/3033 ,  G06F17/30492

    Abstract: Techniques are provided for managing, within a storage system, the sequence in which I/O requests are processed by the storage system based, at least in part, on one or more logical characteristics of the I/O requests. The logical characteristics may include, for example, the identity of the user for whom the I/O request was submitted, the service that submitted the I/O request, the database targeted by the I/O request, an indication of a consumer group to which the I/O request maps, the reason why the I/O request was issued, a priority category of the I/O request, etc. Techniques are also provided for automatically establishing a scheduling policy within a storage system, and for dynamically changing the scheduling policy in response to changes in workload.

    Abstract translation: 提供了技术，用于至少部分地基于I / O请求的一个或多个逻辑特性在存储系统内管理由存储系统处理I / O请求的序列。 逻辑特征可以包括例如提交I / O请求的用户的身份，提交I / O请求的服务，I / O请求所针对的数据库，消费者组的指示 I / O请求映射到哪里，发出I / O请求的原因，I / O请求的优先类别等。还提供了用于在存储系统内自动建立调度策略，并且为了动态地 根据工作负载的变化改变调度策略。

    SELECTIVELY READING DATA FROM CACHE AND PRIMARY STORAGE
    40.
    发明申请
    SELECTIVELY READING DATA FROM CACHE AND PRIMARY STORAGE 有权
    从缓存和初级存储中选择读取数据

    公开(公告)号：US20130212332A1

    公开(公告)日：2013-08-15

    申请号：US13839251

    申请日：2013-03-15

    Applicant: ORACLE INTERNATIONAL CORPORATION

    Inventor： Kothanda Umamageswaran ,  Juan R. Loaiza ,  Umesh Panchaksharaiah ,  Alexander Tsukerman ,  Timothy L. Shetler ,  Bharat C. V. Baddepudi ,  Boris Erlikhman ,  Kiran B. Goyal ,  Nilesh Choudhury ,  Susy Fan ,  Poojan Kumar ,  Selcuk Aya ,  Sue-Kyoung Lee

    IPC: G06F12/08

    CPC classification number: G06F12/084 ,  G06F12/0811 ,  G06F12/0866 ,  G06F12/0888 ,  G06F17/3048 ,  G06F17/30492

    Abstract: Techniques are provided for using an intermediate cache to provide some of the items involved in a scan operation, while other items involved in the scan operation are provided from primary storage. Techniques are also provided for determining whether to service an I/O request for an item with a copy of the item that resides in the intermediate cache based on factors such as a) an identity of the user for whom the I/O request was submitted, b) an identity of a service that submitted the I/O request, c) an indication of a consumer group to which the I/O request maps, or d) whether the intermediate cache is overloaded. Techniques are also provided for determining whether to store items in an intermediate cache in response to the items being retrieved, based on logical characteristics associated with the requests that retrieve the items.

    Abstract translation: 提供了使用中间缓存来提供扫描操作中涉及的一些项目的技术，而从主存储器提供涉及扫描操作的其他项目。 还提供了用于基于以下因素来确定是否对具有驻留在中间高速缓存中的项目的副本的项目的I / O请求进行服务的技术，例如：a）向其提交I / O请求的用户的身份 ，b）提交I / O请求的服务的身份，c）I / O请求所映射的消费者组的指示，或d）中间缓存是否过载。 还提供了基于与检索项目的请求相关联的逻辑特征来确定是否将项目存储在中间高速缓存中以响应于正被检索的项目的技术。

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