duplicate a database is using an RMAN backup as the source. The targetless These six chapters will provide you with a solid foundation for Oracle RMAN. Oracle Enterprise Manager and some of them are afraid or don't know how to use command line interface. This presentation is going to cover RMAN concepts. RMAN Recipes for Oracle Database 11g: A Problem-Solution Approach Configuring RMAN Access to the Oracle Secure Backup sbt Library
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Oracle RMAN in. Oracle Database 12c: New Features & Best Practices. Timothy Chien. Principal Product Manager, Oracle. Rohan Fernandes. Vice President. Steps to backup using RMAN. ▫ Install and configure Media Management software. ▫ Link MML to Oracle. ▫ Create catalog. ▫ Register target database in the. PDF | On Nov 29, , Džemail Zornić and others published Beckup ORACLE database using RMAN.
RMAN stores this information in the control file. Recovery Catalog Schema that the schema contains multiple objects to store backup, restore and recovery info of the target database. RMAN can be configured in two modes. Single Recovery Catalog can support multiple target databases. In no catalog mode, RMAN keeps the backup info in the reusable section of target database of the control file. To avoid this situation Oracle has introduced Recovery Catalog.
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RMAN sets policies that control when backups and replications occur. Administrators manage backup, replication, and restore from a single console and can use all the features of DD Boost, including WAN-efficient replicator software.
RMAN manages all the files collections of data in the catalog, even those created by the Data Domain system. The Data Domain system exposes pre-made disk volumes called storage units to a DD Boost enabled database server.
Each database server can run a different operating system, provided that it is supported by Data Domain. Data Domain does not support combinations other than those detailed in the online compatibility guide, which is available at compatibilityguide. The option to distribute the processing is enabled or disabled on the Data Domain system. The Oracle RMAN agent offers two modes of operation for sending backup data to a Data Domain system, one with distributed segment processing enabled and the other with distributed segment processing disabled.
Distributed segment processing provides the following benefits: Higher throughput is possible because the Oracle RMAN agent sends only unique data to a Data Domain system, instead of sending all the data over the LAN. Throughput improvements depend on the redundant nature of the data being backed up, the overall workload on the database server, and the capability of the database server.
In general, greater throughput is attained with higher redundancy, greater database server workload, and database server capability. The network bandwidth requirements are significantly reduced because only the unique data is sent over the LAN to the Data Domain systems. Recovery from failed backups can potentially proceed much faster.
If a large backup fails in the middle or towards the end, when it is restarted by RMAN, the data already sent to the Data Domain system does not have to be resent. This results in faster completion of the backup on retry. The Data Domain Operating System Administration Guide provides more information about local compression and its configuration. You manage distributed segment processing through the ddboost option commands.
Data Domain recommends that you use distributed segment processing if your network connection is 1 Gb Ethernet. Configuring distributed segment processing on page 36 provides details.
The Data Domain system then segments, deduplicates, and compresses the data before it is written to the disk. Distributed segment processing cannot be disabled on an Extended Retention Data Domain system. The following figure shows a high-level data flow scenario for a single-system Data Domain system with distributed segment processing disabled. The Oracle RMAN agent segments the data, computes IDs for the segments, checks with the Data Domain system for duplicate segments, compresses unique segments that are not found on the Data Domain system, and sends the compressed data to the Data Domain system.
The Data Domain system then writes the unique data to disk. The following figure shows a high-level data flow scenario for a single-system Data Domain system with distributed segment processing enabled. Distributed segment processing 21 22 DD Boost Features Figure 3 High-level data flow with distributed segment processing enabled Advanced load balancing and link failover The advanced load balancing and link failover feature enables the combination of multiple Ethernet links into a group.
The load balancing provides higher physical throughput to the Data Domain system compared to configuring the interfaces into a virtual interface using Ethernet level aggregation.
The Data Domain system load balances the connections coming in from multiple database servers on all the interfaces in the group. The load balancing is transparent to RMAN. Because advanced load balancing and link failover works at the software layer of the Oracle RMAN agent, it is seamless to the underlying network connectivity and supports both physical and virtual interfaces.
The data transfer is load balanced based on the number of connections outstanding on the interfaces. Only connections for backup and restore jobs are load balanced. The file replication connection between the Data Domain systems is not part of the load balancing. A single IP address is used for the target Data Domain system. It is recommended that you exclude one interface from the interface group ifgroup and reserve it for the file replication path between the source and target Data Domain systems.
The following figure shows an example high-level configuration diagram. The interface marked in red is registered with RMAN.
The sample configuration in the preceding figure shows one such possibility. The links connecting the database servers and the switch that connects to Data Domain system are put in an aggregated failover mode. This configuration provides end-to-end network failover functionality. Any of the available aggregation technologies can be used between the database server and the switch. The advanced load balancing and link failover functionality also works with other network layer functionality on the Data Domain systems, including VLAN tagging and IP aliasing.
This functionality enables additional flexibility in segregating traffic into multiple virtual networks, all of which run over the same physical links on the Data Domain system. Advanced load balancing and link failover provides the following benefits: Eliminates the need to register multiple storage servers one for each interface with RMAN, which can potentially simplify installation management.
If one of the interfaces in the group goes down while the Data Domain system is still operational, the subsequent incoming backup jobs are routed to the available interfaces. The backup and restore jobs are automatically load balanced on multiple interfaces in the group, which can potentially result in higher utilization of the links.
All in-flight jobs to the failed interface are failed over transparently to healthy operational links.
From the point of view of RMAN, the jobs continue uninterrupted. Advanced load balancing and link failover 23 24 DD Boost Features Configuration restrictions Configuring advanced load balancing and link failover on page 36 provides more details. Interfaces can be added only to the group by using an IP address. Although the advanced load balancing and link failover feature works with mixed 1 GbE interfaces and 10 GbE interfaces in a group, this is not a recommended setup.
It is recommended to have interfaces with the same link speed in a group. Prior to DD OS 5. This meant that, to connect more than one database server, a switch was needed in the middle.
DD OS 5. Certain installations prefer or require the use of Fibre Channel as the media for data transfer between media servers and storage systems. Although Fibre Channel is specified as a general-purpose data transport mechanism, in practice Fibre Channel is used solely as a transport for SCSI device access. One notable exception is the DD Boost-over-IP advanced load balancing and link failover feature, and its associated ifgroups.
This feature is specific to the IP transport. For the DD Boostover-FC transport, load balancing and link-level high availability is achieved through different means. For example, the managed file replication section of this document describes efficient replication of data from one Data Domain system to another, possibly over a WAN.
The Data Domain system advertises one or more SCSI processor-type devices to the backup server, over one or more physical paths. The operating system discovers all devices through all available paths, and creates a generic SCSI device for each discovered device and path. Four devices 2. Backup Server 3. HBA Initiator A 4.
HBA Initiator B 5.
Data Domain System 6. Fibre Channel Endpoint C 7. As part of establishing the connection to the server, the DD Boost-over-FC transport logic provides to the server this catalog of paths.
The server maintains statistics on the DD Boost-over-FC traffic over the various target endpoints and known initiators. During the connection setup procedure, path management logic in the server consults these statistics, and selects the path to be used for this connection, based upon the following criteria: For queue-depth constrained clients see below , evenly distribute the connections across different paths.
Choose the least-busy target endpoint. Choose the least-busy initiator from among paths to the selected target endpoint. The client may start using a different path because it is directed to do so by the server dynamic re-balancing logic. However, the client may also decide, on its own, to start Initial path selection 27 28 DD Boost Features Dynamic re-balancing Queue-depth constraints using a different available path. This is useful when we perform recovery that goes back in time than the history in the target database control file.
Only the Primary database is explicitly registered to the RMAN Catalog; and Physical Standby databases are registered automatically if they are connected as target while connected to the Recovery Catalog.
We can use a Stored Scripts as an alternative to a command file for managing frequently used sequence of RMAN commands. Stored Scripts can be Global or Local.
A Local Script is created for the current target database only. The Global Scripts can be shared by all databases registered in the Recovery Catalog. The process of enrolling of a database in Recovery Catalog is called Registration.
You can register more than one target database in the Recovery Catalog. Connect to Target database through Catalog database and register the target database. Create the tablespace to store rman catalog objects.
So it is highly recommend to configure Recovery Catalog for Critical Production databases. Archive Log Mode is recommended for Catalog database. Tablespace created. Creating a dedicated user which will be the owner of the Recovery Catalog.
Grant succeeded. This role provides with required privileges to the user to maintain Recovery Catalog. User created. Production on Mon Mar 14 Release All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release Production With the Partitioning. No such file or directory Additional information: Modification time: Like it or not, the fearsome responsibility of protecting your organization's most critical data falls squarely upon your shoulders:.
Oracle's flagship database product fortunately implements a wide-ranging feature set to aid you in the all-important task of safeguarding against data loss. Recovery Manager, or RMAN, is at the heart of that feature set, and is the tool most-often used to initiate database backup and recovery operations.
In this book, well-known authors and database experts Darl Kuhn, Sam Alapati, and Arup Nanda have created a set of examples encompassing the gamut of backup and recovery tasks that you might need to perform.
Sometimes, especially when the heat is on, a good example is what you need to get started towards a solution. RMAN Recipes for Oracle Database 12c gets right to the point with quick and easy-to-read, step-by-step solutions that can help you backup and recover your data with confidence.
Skip to main content Skip to table of contents. Advertisement Hide. Front Matter Pages i-lxvi. Backup and Recovery Pages Using the Fast Recovery Area.