公开(公告)号：US20210200765A1

公开(公告)日：2021-07-01

申请号：US16731100

申请日：2019-12-31

Applicant: Oracle International Corporation

Inventor： Sumit Sahu ,  Lakshminarayanan Chidambaran ,  Krishna Itikarlapalli ,  Srinath Krishnaswamy

IPC: G06F16/2453 ,  G06F16/27 ,  G06F9/52 ,  G06F9/48

Abstract: A server system provided according to an aspect of the present disclosure provides a shared connection pool to parallel execution entities accessing database instances of a distributed database when processing requests. A shared connection pool implies that each pool connection of the connection pool may be used for serving different execution entities requiring access to different database instances. In an embodiment, the database instances correspond to shards together implementing a distributed database, and the parallel execution entities correspond to threads.

公开(公告)号：US12197443B2

公开(公告)日：2025-01-14

申请号：US18128914

申请日：2023-03-30

Applicant: Oracle International Corporation

Inventor： Sumit Sahu ,  Srinath Krishnaswamy ,  Krishna Mohan Itikarlapalli ,  Rajesh Kumar ,  Anoop J S

IPC: G06F16/00 ,  G06F16/2455

Abstract: Disclosed is an improved approach to implement cursor sharing in database systems, where a server-side mapping of cursor identifiers to SQL is maintained to allow for continued use of client-side statement caches even after connections and database sessions are returned to shared pools and then subsequently re-assigned. This avoids the need to clear the statement cache across session releases to the database session pools. Instead, applications can retain their statement cache while still leveraging the benefits of server based pooling solutions.

公开(公告)号：US20240330297A1

公开(公告)日：2024-10-03

申请号：US18128914

申请日：2023-03-30

Applicant: Oracle International Corporation

Inventor： Sumit Sahu ,  Srinath Krishnaswamy ,  Krishna Mohan Itikarlapalli ,  Rajesh Kumar ,  Anoop J S

IPC: G06F16/2455

CPC classification number: G06F16/24552

Abstract: Disclosed is an improved approach to implement cursor sharing in database systems, where a server-side mapping of cursor identifiers to SQL is maintained to allow for continued use of client-side statement caches even after connections and database sessions are returned to shared pools and then subsequently re-assigned. This avoids the need to clear the statement cache across session releases to the database session pools. Instead, applications can retain their statement cache while still leveraging the benefits of server based pooling solutions.

公开(公告)号：US11947534B2

公开(公告)日：2024-04-02

申请号：US16731100

申请日：2019-12-31

Applicant: Oracle International Corporation

Inventor： Sumit Sahu ,  Lakshminarayanan Chidambaran ,  Krishna Itikarlapalli ,  Srinath Krishnaswamy

IPC: G06F16/2453 ,  G06F9/48 ,  G06F9/52 ,  G06F16/27

CPC classification number: G06F16/24532 ,  G06F9/485 ,  G06F9/52 ,  G06F16/27

Abstract: A server system provided according to an aspect of the present disclosure provides a shared connection pool to parallel execution entities accessing database instances of a distributed database when processing requests. A shared connection pool implies that each pool connection of the connection pool may be used for serving different execution entities requiring access to different database instances. In an embodiment, the database instances correspond to shards together implementing a distributed database, and the parallel execution entities correspond to threads.

公开(公告)号：US09582375B2

公开(公告)日：2017-02-28

申请号：US14272167

申请日：2014-05-07

Applicant: Oracle International Corporation

Inventor： Mehul Dilip Bastawala ,  Srinath Krishnaswamy ,  Nancy Reiko Ikeda ,  Lakshminarayanan Chidambaran

IPC: G06F11/00 ,  G06F11/20 ,  H04L29/06 ,  H04L29/08

CPC classification number: G06F11/20 ,  G06F11/203 ,  G06F11/2038 ,  G06F11/2046 ,  G06F2201/82 ,  G06F2201/83 ,  H04L67/1097 ,  H04L67/2814 ,  H04L67/42

Abstract: Some embodiments are directed to a method and apparatus for implementing an automatic failover mechanism for a resource. A client accesses a source through a first server using a first session. During the session, the client stores checksum information corresponding to data received via the session with the first server. When it is detected that the session between the first server and the client has failed, the client is automatically connected with second server that has access to the resource. The checksum information is transmitted from the client to the second server, where it is compared with checksum information calculated at the second server, so that a determination can be made as to whether the client can continue processing where it left off when connected to the second server.

Abstract translation: 一些实施例涉及用于实现资源的自动故障切换机制的方法和装置。 客户端通过第一个服务器使用第一个会话来访问源。 在会话期间，客户端存储与经由与第一服务器的会话接收的数据相对应的校验和信息。 当检测到第一台服务器和客户端之间的会话发生故障时，客户机将自动连接到可访问该资源的第二台服务器。 校验和信息从客户端发送到第二服务器，在第二服务器处与第二服务器计算的校验和信息进行比较，从而可以确定当连接到第二服务器时客户端是否可以继续处理 服务器。

公开(公告)号：US11277435B2

公开(公告)日：2022-03-15

申请号：US15705113

申请日：2017-09-14

Applicant: Oracle International Corporation

Inventor： Krishna Mohan Itikarlapalli ,  Santanu Datta ,  Srinath Krishnaswamy ,  Lakshminarayanan Chidambaran ,  Rajesh Kumar ,  Sumit Sahu ,  Rajendra Pingte

IPC: H04L29/00 ,  H04L29/06 ,  G06F9/54 ,  G06F16/00

Abstract: Techniques described herein improve database security by reducing network attack surface area in conjunction with deep input validation. In an embodiment, a database session receives one or more network packets sent via a network, the database session including a database session state that specifies one or more database privileges. The database session reads said one or more network packets into one or more request-packet-buffers, wherein said one or more request-packet-buffers include an RPC op code for a database operation. Based on the one or more database privileges associated with the user associated with the database session, the database session determines whether the RPC op code may be executed. In response to determining that the RPC op code may be executed by said database session, the RPC op code is executed. In response to determining that the op code may not be executed by said database session, the execution of the RPC op code is prevented.

公开(公告)号：US20180077196A1

公开(公告)日：2018-03-15

申请号：US15705113

申请日：2017-09-14

Applicant: Oracle International Corporation

Inventor： Krishna Mohan Itikarlapalli ,  Santanu Datta ,  Srinath Krishnaswamy ,  Lakshminarayanan Chidambaran ,  Rajesh Kumar ,  Sumit Sahu ,  Rajendra Pingte

IPC: H04L29/06

CPC classification number: H04L63/1441 ,  G06F9/547 ,  G06F16/00 ,  H04L63/0245 ,  H04L63/102

Abstract: Techniques described herein improve database security by reducing network attack surface area in conjunction with deep input validation. In an embodiment, a database session receives one or more network packets sent via a network, the database session including a database session state that specifies one or more database privileges. The database session reads said one or more network packets into one or more request-packet-buffers, wherein said one or more request-packet-buffers include an RPC op code for a database operation. Based on the one or more database privileges associated with the user associated with the database session, the database session determines whether the RPC op code may be executed. In response to determining that the RPC op code may be executed by said database session, the RPC op code is executed. In response to determining that the op code may not be executed by said database session, the execution of the RPC op code is prevented.