公开(公告)号：US10802766B2

公开(公告)日：2020-10-13

申请号：US15720959

申请日：2017-09-29

Applicant: Oracle International Corporation

Inventor： Nilesh Choudhury ,  Kothanda Umamageswaran ,  Krishnan Meiyyappan ,  Jia Shi ,  Vijay Sridharan ,  Zuoyu Tao ,  Kai Zhang ,  Semen Ustimenko ,  Salini Selvaraj Kowsalya ,  Somayeh Sardashti

IPC: G06F16/23 ,  G06F3/06 ,  G06F16/18 ,  G06F16/903

Abstract: A shared storage architecture persistently stores database files in non-volatile random access memories (NVRAMs) of computing nodes of a multi-node DBMS. The computing nodes of the multi-node DBMS not only collectively store database data on NVRAMs of the computing nodes, but also host database server instances that process queries in parallel, host database sessions and database processes, and together manage access to a database stored on the NVRAMs of the computing nodes. To perform a data block read operation from persistent storage, a data block may be transferred directly over a network between NVRAM of a computing node that persistently stores the data block to a database buffer in non-volatile RAM of another computing node that requests the data block. The transfer is accomplished using remote direct memory access (“RDMA).

公开(公告)号：US20190102113A1

公开(公告)日：2019-04-04

申请号：US15720959

申请日：2017-09-29

Applicant: Oracle International Corporation

Inventor： Nilesh Choudhury ,  Kothanda Umamageswaran ,  Krishnan Meiyyappan ,  Jia Shi ,  Vijay Sridharan ,  Zuoyu Tao ,  Kai Zhang ,  Semen Ustimenko ,  Salini Selvaraj Kowsalya ,  Somayeh Sardashti

IPC: G06F3/06 ,  G06F17/30

Abstract: A shared storage architecture persistently stores database files in non-volatile random access memories (NVRAMs) of computing nodes of a multi-node DBMS. The computing nodes of the multi-node DBMS not only collectively store database data on NVRAMs of the computing nodes, but also host database server instances that process queries in parallel, host database sessions and database processes, and together manage access to a database stored on the NVRAMs of the computing nodes. To perform a data block read operation from persistent storage, a data block may be transferred directly over a network between NVRAM of a computing node that persistently stores the data block to a database buffer in non-volatile RAM of another computing node that requests the data block. The transfer is accomplished using remote direct memory access (“RDMA).