公开(公告)号：US20160085681A1

公开(公告)日：2016-03-24

申请号：US14794107

申请日：2015-07-08

Applicant: Oracle International Corporation

Inventor： Selcuk Aya ,  Jia Shi ,  Kothanda Umamageswaran ,  Juan Loaiza

IPC: G06F12/08

CPC classification number: G06F12/0246 ,  G06F12/0804 ,  G06F12/0871 ,  G06F2212/1016 ,  G06F2212/1024 ,  G06F2212/7208

Abstract: Techniques herein are for chaining nonvolatile storage devices to achieve high availability. A method involves a storage server receiving a write request to store data blocks in a first nonvolatile memory device. The storage server comprises a plurality of nonvolatile memory devices that cache data blocks stored on primary storage. The plurality of nonvolatile memory devices comprises the first nonvolatile memory device. The storage server maintains a cache index of data blocks that reside in the plurality of nonvolatile memory devices. Based on one or more criteria, the storage server reroutes the write request to a second nonvolatile memory device of the plurality of nonvolatile memory devices and stores an identifier of the second nonvolatile memory device in the cache index.

Abstract translation: 这里的技术是用于链接非易失性存储设备以实现高可用性。 一种方法涉及存储服务器，其接收写入请求以将数据块存储在第一非易失性存储器设备中。 存储服务器包括多个非易失性存储器设备，其缓存存储在主存储器上的数据块。 多个非易失性存储器件包括第一非易失性存储器件。 存储服务器维护驻留在多个非易失性存储器设备中的数据块的缓存索引。 基于一个或多个标准，存储服务器将写请求重新路由到多个非易失性存储器设备中的第二非易失性存储器设备，并将第二非易失性存储器设备的标识符存储在高速缓存索引中。

公开(公告)号：US20150089140A1

公开(公告)日：2015-03-26

申请号：US14490367

申请日：2014-09-18

Applicant: Oracle International Corporation

Inventor： Vijay Sridharan ,  Alexander Tsukerman ,  Jia Shi ,  Kothanda Umamageswaran

IPC: G06F3/06 ,  G06F12/08

CPC classification number: G06F3/065 ,  G06F3/061 ,  G06F3/0619 ,  G06F3/0659 ,  G06F3/067 ,  G06F3/0689 ,  G06F12/0875 ,  G06F2212/313

Abstract: In a write by-peer-reference, a storage device client writes a data block to a target storage device in the storage system by sending a write request to the target storage device, the write request specifying information used to obtain the data block from a source storage device in the storage system. The target storage device sends a read request to the source storage device for the data block. The source storage device sends the data block to the target storage device, which then writes the data block to the target storage device. The data block is thus written to the target storage device without the storage device client transmitting the data block itself to the target storage device.

Abstract translation: 在写入对等参考中，存储设备客户端通过向目标存储设备发送写请求，将数据块写入存储系统中的目标存储设备，从用于从目标存储设备获取数据块的写请求指定信息 源存储设备在存储系统中。 目标存储设备向数据块的源存储设备发送读请求。 源存储装置将数据块发送到目标存储装置，然后将该数据块写入目标存储装置。 因此，数据块被写入到目标存储设备，而没有存储设备客户端将数据块本身发送到目标存储设备。

公开(公告)号：US20150088805A1

公开(公告)日：2015-03-26

申请号：US14489221

申请日：2014-09-17

Applicant: Oracle International Corporation

Inventor： Sarat B. Kakarla ,  Jia Shi ,  Selcuk Aya ,  Kothanda Umamageswaran ,  Juan R. Loaiza

IPC: G06F17/30 ,  G06F12/08

CPC classification number: G06F17/3048 ,  G06F17/30306 ,  G06F17/30592

Abstract: Approaches, techniques, and mechanisms are disclosed for improved caching in database systems that deal with multiple data access patterns, such as in database systems that interface with both OLTP and Data Warehouse clients. A cache is deployed between a database server and a storage system that stores data units. Some of the data units accessed by the database server are buffered within the cache. The data units may be associated with data access patterns, such as a random data access pattern or a scan data access pattern, in accordance with which the database server is or appears to be accessing the data units. A processor selects when to cache data units accessed by the database server, based at least on the associated data access patterns. Recent access counts may also be stored for the data units, and may further be utilized to select when to cache data units.

Abstract translation: 披露了处理多种数据访问模式的数据库系统中的改进缓存的方法，技术和机制，例如在与OLTP和数据仓库客户端接口的数据库系统中。 缓存部署在数据库服务器和存储数据单元的存储系统之间。 数据库服务器访问的一些数据单元被缓存在缓存内。 数据单元可以与诸如随机数据访问模式或扫描数据访问模式的数据访问模式相关联，数据库服务器根据该数据访问模式或者似乎正在访问数据单元。 处理器至少基于相关联的数据访问模式来选择什么时候来高速缓存由数据库服务器访问的数据单元。 也可以为数据单元存储最近的访问计数，并且还可以用于选择何时高速缓存数据单元。