Invention Grant
- Patent Title: Cloning a pluggable database in read-write mode
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Application No.: US15215435Application Date: 2016-07-20
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Publication No.: US10922331B2Publication Date: 2021-02-16
- Inventor: Giridhar Ravipati , Kumar Rajamani , Yunrui Li , Jaebock Lee , Sanket Jain
- Applicant: Oracle International Corporation
- Applicant Address: US CA Redwood Shores
- Assignee: Oracle International Corporation
- Current Assignee: Oracle International Corporation
- Current Assignee Address: US CA Redwood Shores
- Agency: Hickman Palermo Becker Bingham LLP
- Main IPC: G06F16/00
- IPC: G06F16/00 ; G06F16/27 ; G06F16/13 ; G06F16/11 ; G06F16/178 ; G06F16/23

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.
Public/Granted literature
- US20170116249A1 CLONING A PLUGGABLE DATABASE IN READ-WRITE MODE Public/Granted day:2017-04-27
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