This could happen if an archived redo log backup has taken place on the target server during the clone operation and deleted the backed up logs. This is known as active database duplication. You want two online redo logs groups, each with two members of size 200 KB, which on the duplicate system will be stored in the directory "/duplogs". This example shows the steps required to update a standby database using incremental backups. The backup sets produced by this command are written to ?/dbs by default, even if the flash recovery area or some other backup destination is defined as the default for disk backups. Listed in order of precedence, they are: Use the RMAN command SET NEWNAME FOR DATAFILE within a RUN block that encloses both the SET NEWNAME commands and the DUPLICATE command. Since we are duplicating the database onto a separate server with the same filesystem as the original, we don't need to convert the file names. Makes the duplicate filenames the same as the filenames from the target. In particular, this capability makes it possible to reverse the effects of converting the standby into a reporting database. More specifically, if the duplicate database exists in the same Oracle home as the target, then the DB_NAME initialization parameter must be different. KT Experts is one enthusiastic knowledge-sharing platform. In this article we will implement RMAN Cloning on different servers. The incremental backup is created at the source database by means of the BACKUP INCREMENTAL FROM SCN=n form of the BACKUP command. 12c | RMAN uses the REUSE parameter when creating the logs. 9i | In case of ASM storage, create required ASM diskgroups accessible to all clone Nodes. So long as RMAN is able to connect to the primary and auxiliary instances, the RMAN client can run on any host. Table 13-2 Read-Only Tablespaces in V$DATAFILE View on Duplicate Database, Table 13-3 Read-Only Tablespaces in Data Dictionary Views on Duplicate Database. Allocate at least one auxiliary channel on the auxiliary instance. o1_mf_nnnd0_TAG20201016T234303_hrmroyoq_.bkp 100% 2079MB 33.0MB/s 01:03. The process is similar to the backup-based duplication, with a few exceptions. Linux. When using disk backups, you can accomplish this goal in any of the following ways: Manually transfer the backups from the primary host to the remote host to an identical path. With an RMAN client connected to the standby database, run the following command: You can now resume managed recovery at the standby. The principal work of the duplication is performed by the auxiliary channel, which starts a server session on the duplicate host. If you do not have backups of everything, then the duplicate operation fails. Change the parameters as follows: Set DB_NAME to the new database name dupdb, Set CONTROL_FILES to store two copies of the control file in +DISK1, Make sure DB_FILE_NAME_CONVERT and LOG_FILE_NAME_CONVERT are not set, Set any other initialization parameters that end in _DEST, such as DB_CREATE_FILE_DEST and DB_CREATE_ONLINE_DEST_n, to reference +DISK1. You can run this command before or after instance startup. The destination server requires static listener configuration in a "listener.ora" file. The platform concentrates on all Database Technologies like Oracle Database Administration(DBA), Oracle RAC, Oracle GoldenGate, MySQL, SQL Server Database Administration, Cassandra, AWS and DevOps. host1 and host2 cannot mount each other's file systems by any means such as NFS. Certification | Create a pfile for the Standby database on the Standby server and try to start non-existent database in nomount mode. Step 6: Once the Duplicate database is done successfully, you should run the Recover database command as follows. If you are copying the files, you may want to use the following type of commands. Home | Specify the DB_FILE_NAME_CONVERT parameter on the DUPLICATE command to specify a rule for converting filenames for any datafiles not renamed with SET NEWNAME or CONFIGURE AUXNAME.
You want to store two controlfiles in +DISK1. On the clone server, open the pfile that you copied from prod server. Create a client-side initialization parameter file for the auxiliary instance. Articles |
Example 13-1 shows sample initialization parameter settings for the duplicate database. You can create an incremental backup of the target database containing changes to the database since the creation of the duplicate or the previous syncrhonization. You can also use SET NEWNAME to direct individual datafiles or tempfiles to a specific ASM disk group. To prepare for database duplication, first create an auxiliary instance as described in "Preparing the RMAN DUPLICATE Auxiliary Instance: Basic Steps". If you create the duplicate database on a host with a different directory structure, then you must change several initialization parameters in order to generate new filenames for the duplicate database datafiles on the new directory structure. For example, the NFS mount point for both hosts could be /home/file_server. As described in "Using RMAN DUPLICATE with OMF and ASM", you can also duplicate your database to an Oracle Managed Files location and let the database generate names for your files. It is highly recommended that you create a server-side parameter file for use in database duplication. Oracle recommends that you use an SPFILE at the duplicate database when using OMF for the control file. start duplicate with the following script. When duplicating a database, you have the following options: You can run the DUPLICATE command with or without a recovery catalog. Make sure that all required pre-requisites / setup for Clusterware / Grid Infrastructure / RAC Oracle Home are executed and verified. This will allow the database to generate valid OMF filenames for the duplicate datafiles. For the duplication to work, you must connect RMAN to both the target (primary) database and an auxiliary instance started in NOMOUNT mode. In this example, oracle is the password for the user with SYSDBA authority and aux is the net service name for the auxiliary instance: Because the auxiliary instance does not yet have a control file, you can only start the instance in NOMOUNT mode. orapwd file=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/orapwtestdb password=
All changed blocks captured in the incremental backup are updated at the standby database, bringing it up to date with the primary database. It is possible to create a duplicate database on a remote server with the same file structure, a remote server will a different file structure or the local server with a different file structure.we will connect rman to the auxiliary instance and run duplicate command.In this Demo we are doing RMAN Cloning on same server.Only thing what is required the full backup of the Target database. The task here is to refresh the standby with the latest changes to the primary, so that it can resume its role as a standby database. In this case, the DUPLICATE command creates the datafiles, online redo logs, and tempfiles as Oracle Managed Files. You want to duplicate the target to database dupdb on remote host host2. This procedure assumes that you use the DB_FILE_NAME_CONVERT parameter of the DUPLICATE command to rename the duplicate datafiles, and the LOGFILE clause to specify names and sizes for the online redo logs. RAC | For example: RMAN uses the selected SCN as the basis for this incremental backup. For tape backups, limit the number of channels to the number of devices available. 11g | Convert the non-RAC clone (duplicate) database to RAC Database using tools like rconfig, Oracle Enterprise Manager, etc. It is possible to create a duplicate database on a remote server with the same file structure, a remote server will a different file structure or the local server with a different file structure. An incremental backup created with BACKUP INCREMENTAL FROM SCN can be used to refresh the standby with changes at the primary since the conversion and then managed recovery can resume. Read-only tablespaces are included by default.
Use NFS or shared disks and make sure that the same path is accessible in the remote host. Finally, RMAN opens the database with the RESETLOGS option to create the online redo logs. For example, edit the auxiliary instance parameter file as follows to create the database files in the disk group disk1: If you want to store specific datafiles or tempfiles in an OMF destination, independent of the locations of the rest of the database files, then you can use the following steps: Set the DB_CREATE_FILE_DEST initialization parameter at the auxiliary instance to the desired location, Enclose the DUPLICATE command in a RUN block, Use SET NEWNAME FOR DATAFILE TO NEW and SET NEWNAME FOR TEMPFILE TO NEW commands in the RUN block with the DUPLICATE command. Flashback Restore on Two Node RAC Servers, Oracle to Oracle GoldenGate Unidirectional Replication, MySQL to Oracle Heterogeneous Replication, Oracle to MySQL Heterogeneous Replication, Usage of HandleCollisions and No HandleCollisions, IgnoreDelete and IgnoreUpdate parameters in GG, Add new table to existing GoldenGate Replication, https://www.youtube.com/watch?v=kzqFBMFlzRI, Controlfile Multiplexing and De-Multiplexing In Oracle12c, Installation and Configuration of GoldenGate 19C on Oracle RAC, 12c NON-CONTAINER DATABASE TO 19c PLUGGABLE DATABASE, Shell script to alert us when specified background process exceeds limit. Specify the names and sizes for the duplicate database redo logs in the LOGFILE clause. Oracle 11g introduced the ability to create duplicate databases directly without the need for a backup. In this case, the PFILE is called "/tmp/initDB11G.ora". Table 13-8 explains the required initialization parameter values, depending upon your requirements. Refer to "Renaming Datafiles in RMAN DUPLICATE DATABASE". These decisions determine whether you use the Oracle Managed Files initialization parameters DB_RECOVERY_FILE_DEST, DB_CREATE_FILE_DEST, or DB_CREATE_ONLINE_DEST_n. When choosing names for the duplicate control files, make sure you set the parameters in the initialization parameter file of the auxiliary database correctly; otherwise, you could overwrite the control files of the target database. RMAN,GoldenGate,MySQL DBA and Amazon Web Services. Before you begin with this activity, make sure below items are addressed, Source database is running in Archive log mode, Check for space requirements on target server. The database backup does not have to be a whole database backup: you can use a mix of full and incremental backups of individual datafiles. For details on the use of LOG_FILE_NAME_CONVERT with Oracle Managed Files (OMF), see "Initialization Parameters for RMAN DUPLICATE to OMF Storage". Specify the LOGFILE clause of DUPLICATE command. Perform the following operations when running the duplication: If using a client-side parameter file to start the auxiliary instance, specify the PFILE parameter. Scripting on this page enhances content navigation, but does not change the content in any way. If the primary database is damaged or destroyed, then you can perform failover to the standby database and transform it into the new primary database. In our example we will use RMAN ACTIVE DUPLICATE method introduced in 11g. Do not set the LOG_FILE_NAME_CONVERT initialization parameter. You have disk copies or backup sets stored on disk for all the datafiles and archived redo logs in the target database, and you have manually moved them to host2 by means of an operating system utility.
document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); I am Founder of SysDBASoft IT and IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience.I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. The assumption is that you have already activated the standby, performed your tests or other operations at the standby, and then used Flashback Database to undo the effects of those changes. We will be using RMAN duplicate from active database to copy prod database on clone server. As part of the duplicating operation, RMAN automates the following steps: Creates a control file for the duplicate database, Restores the target datafiles to the duplicate database and performs incomplete recovery by using all available incremental backups and archived redo logs, Shuts down and starts the auxiliary instance (refer to "Task 4: Start the Auxiliary Instance" for issues relating to client-side versus server-side initialization parameter files), Opens the duplicate database with the RESETLOGS option after incomplete recovery to create the online redo logs (except when running DUPLICATE FOR STANDBY, in which case RMAN does not open the database), Generates a new, unique DBID for the duplicate database (except when you create a standby database with DUPLICATE FOR STANDBY, in which case RMAN does not create a unique DBID). The client-side parameter file must exist on the same host as the RMAN client used to perform the duplication. In terms of your comparison, I give the output of the last part below, and if the output is not in this way, you probably have made an error or deficiency. All backups and archived redo logs used for creating and recovering the duplicate database, however, must be accessible by the server session on the duplicate host.
clients as a Consultant, Insource or Outsource.I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks.I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients.If you need Oracle DBA, SQL Server DBA, APPS DBA, Exadata, Goldengate, EBS Consultancy and Training you can send my email adress, IT Tutorial Copyright 2022, All Rights Reserved, Oracle Clone Database with Duplicate database, duplicate target database for standby from active database. First, and most obviously, you don't need a backup of the source system, but it does have to be in ARCHIVELOG mode. The backups or copies can be transferred to the local disk of the node that contains the duplicate database or possibly mounted across a network by some means such as NFS. Required fields are marked *. The client-side parameter file for the auxiliary instance must reside on the same host as the RMAN client used to perform the duplication. This technique is similar to the scenario described in "Using RMAN DUPLICATE With SET NEWNAME: Example". Create a password file for the duplicate instance. Step 5:Start the auxiliary instance using the modified by pfile. The specified files are created with OMF names in the location specified by DB_CREATE_FILE_DEST. Use the RMAN CATALOG command to register the backup sets in the RMAN repository at the duplicate. That can be done by either copying them to the matching location on the destination server, or placing them on a shared drive. Set Oracle Environment on New Target database Server and start Oracle instance with nomount mode. Replace prod with clone SID, Add below two parameters to change data files and log files locations while cloning database, Create respective directories from the clone pfile. This channel then restores the necessary backups of the primary database, uses them to create the duplicate database, and initiates recovery. All subsequent actions occur on the server running the duplicate database. In this case I used the following configuration. This is an effort of many dedicated professionals for a better IT world. The duplicate database can be identical to the target database or contain only a subset of the tablespaces in the target database. You can also use the CONFIGURE AUXNAME or SET NEWNAME commands to rename individual datafiles if you cannot easily generate all of your desired filenames using DB_FILE_NAME_CONVERT patterns. Note that you must connect to the auxiliary instance with SYSDBA privileges, so a password file must exist. Videos | You then apply the incremental backup to the standby database, which updates it with all changes. You can achieve this goal by physically moving the tape to a drive attached to the remote host or by means of a network-accessible tape server. This can only fail if the archived redo logs on the target system have been removed during the clone operation. The procedure to create a duplicate database depends on your configuration. RMAN then shuts down, starts, and opens the database with the RESETLOGS option to create the online redo logs. In this case, you do not need to change the initialization parameter file or set new filenames for the duplicate datafiles. For instructions on how to create and maintain Oracle password files, refer to Oracle Database Administrator's Guide. SQL> select status,instance_name from v$instance; RMAN Backup based Cloning Database using Oracle 12c, https://doyensys.com/blogs/wp-content/uploads/2021/02/dpyensys-logo.png, Know how Oracle Database Consultancy Services can help your Business, Oracle Launches Dedicated OCI Regions in India, Switch to Oracle Gen-2 Cloud Infrastructure for elevated business growth | Tips for CIOs. Archived redo logs required to recover the duplicate database to the desired point in time must be accessible at the same path by the node where the duplicate database is to be created.