Does Oracle Standard Support Data Guard?
No. An Oracle Database Enterprise Edition license is the only license required to use Data Guard features other than those explicitly included with the Active Data Guard Option as described in the table above.
How do I know if Data Guard is enabled?
The Data Guard features are enabled by default. You can’t even turn them off. To know if you are using any DG features, check LOG_ARCHIVE_DEST_n parameters. Look for any archive dest that is not a local location.
What are the Data Guard modes?
The modes for the Data Guard configuration include maximum protection, maximum availability, and maximum performance. The Data Guard configuration can also have more than one standby database.
What is difference between Data Guard and RAC in Oracle?
rac is a cluster of machines (nodes) whereby the oracle instance is being switched around if the node which houses the instance has some problems? dataguard is a configuration of 2 machines. one is the production and the other is the standby, exact replica of the production.
What is Active Data Guard in Oracle 11g?
Oracle Active Data GuardData GuardOracle Active Data Guard ensures high availability, data protection, and disaster recovery for enterprise data. Survive disasters and data corruption while creating, maintaining, and managing one or more synchronized standby databases.https://www.oracle.com › database › data-guardData Guard – Oracle, an option of Oracle Database 11g Enterprise Edition is a simple, high performance solution that protects your Oracle Database against planned and unplanned downtimes, by allowing you to offload resource workloads from your production database to one or more synchronized standby databases.
What type of database is Oracle 11g?
Relational Database Management System
Relational Database Management System (RDBMS)
How do I check my Dgmgrl configuration?
You can enable the entire configuration, including all of the databases, with the following command: DGMGRL> ENABLE CONFIGURATION; Enabled. Show the configuration. Enable the database.
How do I know if my Data Guard is lagging?
Check for LAG from V$DATAGUARD_STATS View.
What is LNS and RFS in dataguard?
LNS process of primary database captures redo from redo log buffer. Send it to RFS process of standby database through oracle net. RFS process then writes that redo information to standby redo log files.
What is default mode in dataguard?
Maximum Performance :
This is default Protection mode in dataguard. Unlike Maximum Availability Protection mode, this mode allows transactions to commit as soon as all redo data generated by those transactions are written to online redo log files.
What is the difference between physical standby and active data guard?
Moreover, Active Data Guard enables read-only access to a physical standby database. It is possible to offload queries and reports from the production system to a synchronized physical standby database. Thus, all queries at the standby database return up to date results.
What is the difference between standby and Data Guard?
Dataguard : Dataguard is mechanism/tool to maintain standby database. Data Guard provides a comprehensive set of services that create, maintain, manage, and monitor one or more standby databases to enable production Oracle databases to survive disasters and data corruptions.
What is difference between Data Guard and Active Data Guard?
The main difference between Oracle Data Guard and Active Data Guard is that Oracle Data Guard is an extension to the Oracle RDBMS that provides data availability and protection while Active Data Guard is an extension of Oracle Data Guard that improves the production database performance for critical transactions.
What is passive Data Guard?
Data Guard (DG) DG lets us setup a standby site in case of disaster at our primary site. Passive DB is at a different location. During normal operations, DG replicates our transactions from the primary to the standby site, keeping both databases exactly in sync. DG is used in 2 cases only.
Is Oracle Database 11g still supported?
Oracle Premier Support for 11.2. 0.4 (11G) came to an end back in 2015, with Extended Support due to expire 31st December 2020. Oracle made the decision to waive the 11G Extended Support fee for users with a valid support contract until December 2018.
What is difference between Oracle 11g and 19c?
This release has simplified the syntax of JSON functions and allows users to perform partial JSON updates. It also offers SODA APIs for Node. js, C, Python, and Java. 19C provides a machine learning algorithm function that allows constant adjustment of the index.
Where are dataguard logs?
Viewing Data Guard Diagnostic Information
The broker log files are named drc. log and are located in the same directory as the alert log file. You can obtain information about the health of the database (referred to as the database status) by issuing the SHOW DATABASE DGMGRL command.
How do I enable Dgmgrl configuration?
Oracle 11gR2 – Data Guard Broker
- Configure LISTENER. ORA.
- Configure TNSNAMES. ORA.
- Enable Data Guard Broker.
- Start DGMGRL.
- Create Data Guard Broker Configuration.
- Add standby database(s)
- Enable the configuration.
- Switchover to standby.
How do I check my Data Guard gap?
Step by Step Process to Resolve gap on the Standby database.
- Check the name and status of database.
- Check for GAP on standby.
- Check redo received on standby.
- Check redo applied on standby.
- Identify missing archive log files.
- Copy archive log files.
- Register archive log files with standby.
How do I know which standby is primary or sync?
Following command will help to check the Standby is sync with Primary Database in Oracle Dataguard Environment. select thread#, max(sequence#) “Last Standby Seq Applied” from v$archived_log val, v$database vdb where val. resetlogs_change# = vdb. resetlogs_change# and val.
What is RFS and MRP?
The remote file server (RFS) process receives redo data from the primary database either in the form of archived redo logs or standby redo logs. Archiver (ARCn) If standby redo logs are being used, the ARCn process archives the standby redo logs that are to be applied by the managed recovery process (MRP).
How do I start a RFS process in Data Guard?
Step 1: Switch logfile at Primary Database : SQL> ALTER SYSTEM SWITCH LOGFILE; System altered. Here we can see whenever log switch occurs at Primary, RFS process adds an entry of archive log to standby database.
What is Max availability dataguard?
MAXIMUM AVAILABILITY protection mode
In MAXIMUM AVAILABILITY mode, the primary database does not halt if it cannot transmit redo data to at least one participating standby database. During this period the protection mode is switched to MAXIMUM PERFORMANCE, the lowest level of data protection.
What are the types of standby database in Oracle?
A standby database can be one of these types: a physical standby database, a logical standby database, or a snapshot standby database. If needed, either a physical or a logical standby database can assume the role of the primary database and take over production processing.
What is the difference between physical and logical standby?
The logical standby database is a database that does not have the schema structure exactly similar to the source database. In contrast, a physical standby database is a database that replicates the exact contents of its primary database across the Oracle Net Network layer.