公开(公告)号：US10860605B2

公开(公告)日：2020-12-08

申请号：US15215446

申请日：2016-07-20

Applicant: Oracle International Corporation

Inventor： Jaebock Lee ,  Kumar Rajamani ,  Sanket Jain ,  Giridhar Ravipati

IPC: G06F16/00 ,  G06F16/27 ,  G06F16/13 ,  G06F16/11 ,  G06F16/178 ,  G06F16/23

Abstract: Embodiments minimize downtime involved in moving a PDB between CDBs by allowing read-write access to the PDB through most of the moving operation, and by transparently forwarding connection requests, for the PDB, from the source CDB to the destination CDB. The files of a source PDB are copied from a source CDB to a destination CDB, during which the source PDB may be in read-write mode. The source PDB is then closed to write operations so that changes to the source PDB cease. Another round of recovery is performed on the PDB clone, which applies all changes that have been performed on the source PDB during the copy operation and the PDB clone is opened for read and write operations. Forwarding information is registered with the source location, which information is used to automatically forward connection requests, received at the source location for the moved PDB, to the destination location.

公开(公告)号：US20170116298A1

公开(公告)日：2017-04-27

申请号：US15215443

申请日：2016-07-20

Applicant: Oracle International Corporation

Inventor： Giridhar Ravipati ,  Kumar Rajamani ,  Yunrui Li ,  Muthu Olagappan ,  Jaebock Lee ,  Sanket Jain

IPC: G06F17/30 ,  G06F11/14

CPC classification number: G06F16/27 ,  G06F11/14 ,  G06F11/1469 ,  G06F16/119 ,  G06F16/13 ,  G06F16/178 ,  G06F16/214 ,  G06F16/2358 ,  G06F16/2365 ,  G06F16/273 ,  G06F2201/84

Abstract: Embodiments incrementally refresh a clone of a source PDB while the source PDB accepts write operations. Specifically, refreshing the PDB clone incorporates changes made to the source PDB since a refresh reference time stamp, which marks the time at which the PDB clone was created or, if the PDB clone has been previously refreshed, the time at which the PDB clone was last refreshed. A PDB clone is incrementally refreshed by incorporating, into the PDB clone data, those source data blocks that have changed since the refresh reference time stamp. Recovery is performed on the PDB clone, once the blocks are copied, to apply any changes made to the source PDB while the blocks were being copied, which recovery makes the PDB clone files consistent. This recovery is based on redo entries recorded for the source PDB during the time it took to copy the blocks to the PDB clone.

公开(公告)号：US20170116282A1

公开(公告)日：2017-04-27

申请号：US15192837

申请日：2016-06-24

Applicant: Oracle International Corporation

Inventor： Sanket Jain ,  Kumar Rajamani ,  Jaebock Lee ,  Giridhar Ravipati

IPC: G06F17/30

CPC classification number: G06F16/24566 ,  G06F16/172 ,  G06F16/214 ,  G06F16/258

Abstract: A pluggable database (PDB) that is encoded using a particular character set (differing character set) may be plugged into a container database (CDB) and queried, even when the CDB in which the particular PDB resides is encoded using a different character set. The DBMS records what character set is used to encode the PDB. Any predicate that may prune results from a PDB that is encoded in a differing character set is converted to the differing character set as needed, such that the predicate may be applied within the PDB to prune results. At times, cross-container views will require data from a PDB that is encoded using a differing character set. The data returned from a recursive query over the PDB is converted to being encoded using the character set of the root database of the CDB.

公开(公告)号：US20170116235A1

公开(公告)日：2017-04-27

申请号：US15266030

申请日：2016-09-15

Applicant: Oracle International Corporation

Inventor： Philip Yam ,  Kumar Rajamani ,  Jaebock Lee

IPC: G06F17/30

CPC classification number: G06F16/24566 ,  G06F16/172 ,  G06F16/214 ,  G06F16/258

Abstract: A database server instance automatically detects configuration issues when a pluggable database (PDB) is plugged into a new destination container database (CDB). The database server instance identifies one or more update templates, within the destination CDB, that, when run over the relocated PDB, will update the configuration of the PDB to conform to the configuration of the destination CDB. Instead of requiring an administrator to initiate update scripts from a DBMS kernel to reconfigure a PDB, the DBMS creates the update templates by recording commands run within PDBs in connection with system updates. These recorded update templates may then be run over relocated PDBs, to configure the PDBs according to the configuration of the destination CDB. Further, the update templates may be pre-recorded update templates, which record commands to perform configuration updates, to PDBs, that have never before been performed within the CDB.

公开(公告)号：US20150254240A1

公开(公告)日：2015-09-10

申请号：US14202091

申请日：2014-03-10

Applicant: Oracle International Corporation

Inventor： Yunrui Li ,  Kumar Rajamani ,  Giridhar Ravipati ,  Chi Cao Minh ,  Jaebock Lee ,  Sanket Jain ,  Jonghyun Lee

IPC: G06F17/30

CPC classification number: G06F17/303 ,  G06F17/30371 ,  G06F17/30575

Abstract: A pluggable database is transported between a source DBMS and a destination DBMS, in a way that minimizes downtime of the pluggable database. While a copy of the pluggable database is being made at the destination DBMS, transactions continue to execute against the pluggable database at the source DBMS and change the pluggable database. Eventually, the transactions terminate or cease executing. Redo records generated for the transactions are applied to the copy of the pluggable database at the source DBMS. Undo records generated for at least some of the transactions may be stored in a separate undo log and transported to the destination DBMS. The transported pluggable database is synchronized at a destination DBMS in a “pluggable-ready state”, where it may be plugged into the destination container DBMS.

Abstract translation: 可插拔数据库在源DBMS和目标DBMS之间传输，从而最大限度地减少可插拔数据库的停机时间。 虽然目标DBMS正在进行可插拔数据库的副本，但是事务将继续针对源DBMS上的可插拔数据库执行，并更改可插拔数据库。 最终，交易终止或停止执行。 为事务生成的重做记录应用于源DBMS的可插拔数据库的副本。 至少为某些事务生成的撤销记录可以存储在单独的撤销日志中，并传送到目标DBMS。 传输的可插拔数据库在目标DBMS上以“可插拔就绪状态”进行同步，可以插入到目标容器DBMS中。

公开(公告)号：US20210056123A1

公开(公告)日：2021-02-25

申请号：US17090732

申请日：2020-11-05

Applicant: Oracle International Corporation

Inventor： Jaebock Lee ,  Kumar Rajamani ,  Sanket Jain ,  Giridhar Ravipati

IPC: G06F16/27 ,  G06F16/13 ,  G06F16/11 ,  G06F16/178 ,  G06F16/23

Abstract: Embodiments minimize downtime involved in moving a PDB between CDBs by allowing read-write access to the PDB through most of the moving operation, and by transparently forwarding connection requests, for the PDB, from the source CDB to the destination CDB. The files of a source PDB are copied from a source CDB to a destination CDB, during which the source PDB may be in read-write mode. The source PDB is then closed to write operations so that changes to the source PDB cease. Another round of recovery is performed on the PDB clone, which applies all changes that have been performed on the source PDB during the copy operation and the PDB clone is opened for read and write operations. Forwarding information is registered with the source location, which information is used to automatically forward connection requests, received at the source location for the moved PDB, to the destination location.

公开(公告)号：US10191671B2

公开(公告)日：2019-01-29

申请号：US14835507

申请日：2015-08-25

Applicant: ORACLE INTERNATIONAL CORPORATION

Inventor： Andre Kruglikov ,  Kumar Rajamani ,  Jaebock Lee ,  Sanket Jain ,  Giridhar Ravipati

IPC: G06F17/30 ,  G06F3/06 ,  G06F11/14 ,  G06F21/62 ,  G06F12/084 ,  G06F13/16

Abstract: Techniques for common users and roles, and commonly-granted privileges and roles are described. In one approach, the DBMS of a container database allows for the creation of common roles and common users that are shared across the container database. Thus, when a common role or a common user is established, the common role or common user is propagated to each database of the container database. In another approach, the DBMS of a container database allows privileges and roles to be granted commonly or locally. When a privilege or role is granted commonly, the privilege applies in each of the databases of a container database. When a privilege or role is granted locally, the privilege applies only in the database to which the grantor of the privilege or role established a connection.

公开(公告)号：US20180075041A1

公开(公告)日：2018-03-15

申请号：US15266340

申请日：2016-09-15

Applicant: Oracle International Corporation

Inventor： Margaret Susairaj ,  Giridhar Ravipati ,  Kumar Rajamani ,  Yunrui Li ,  Jaebock Lee ,  Sanket Jain

IPC: G06F17/30 ,  G06F11/14

Abstract: Techniques are provided for using a sparse file to create a hot archive of a pluggable database of a container database. In an embodiment and while a source pluggable database is in service, a source database server creates a clone of the source pluggable database. Also while the source pluggable database is in service, the source database server creates an archive of the source pluggable database that is based on the clone. Eventually, a need arises to consume the archive. A target database server (which may also be the source database server) creates a target pluggable database based on the archive.

公开(公告)号：US20170116249A1

公开(公告)日：2017-04-27

申请号：US15215435

申请日：2016-07-20

Applicant: Oracle International Corporation

Inventor： Giridhar Ravipati ,  Kumar Rajamani ,  Yunrui Li ,  Jaebock Lee ,  Sanket Jain

IPC: G06F17/30

CPC classification number: G06F16/27 ,  G06F11/14 ,  G06F11/1469 ,  G06F16/119 ,  G06F16/13 ,  G06F16/178 ,  G06F16/214 ,  G06F16/2358 ,  G06F16/2365 ,  G06F16/273 ,  G06F2201/84

Abstract: Embodiments create a clone of a PDB while the PDB accepts write operations. While the PDB remains in read-write mode, the DBMS copies the data of the PDB and sends the data to a destination location. The DBMS performs data recovery on the PDB clone based on redo entries that record changes made to the source PDB while the DBMS copied the source PDB files. This data recovery makes all changes, to the PDB clone, that occurred to the source PDB during the copy operation. The redo information, on which the data recovery is based, is foreign to the PDB clone since the redo entries were recorded for a different PDB. In order to apply foreign redo information to perform recovery on the PDB clone, a DBMS managing the PDB clone maintains mapping information that maps PDB source reference information to corresponding information for the PDB clone.

公开(公告)号：US20170116207A1

公开(公告)日：2017-04-27

申请号：US15215446

申请日：2016-07-20

Applicant: Oracle International Corporation

Inventor： Jaebock Lee ,  Kumar Rajamani ,  Sanket Jain ,  Giridhar Ravipati

IPC: G06F17/30

CPC classification number: G06F16/27 ,  G06F11/14 ,  G06F11/1469 ,  G06F16/119 ,  G06F16/13 ,  G06F16/178 ,  G06F16/214 ,  G06F16/2358 ,  G06F16/2365 ,  G06F16/273 ,  G06F2201/84

Abstract: Embodiments minimize downtime involved in moving a PDB between CDBs by allowing read-write access to the PDB through most of the moving operation, and by transparently forwarding connection requests, for the PDB, from the source CDB to the destination CDB. The files of a source PDB are copied from a source CDB to a destination CDB, during which the source PDB may be in read-write mode. The source PDB is then closed to write operations so that changes to the source PDB cease. Another round of recovery is performed on the PDB clone, which applies all changes that have been performed on the source PDB during the copy operation and the PDB clone is opened for read and write operations. Forwarding information is registered with the source location, which information is used to automatically forward connection requests, received at the source location for the moved PDB, to the destination location.