- What is a logical standby database?
- How do I open a standby database when the primary database is lost?
- What is snapshot standby database?
- How can I tell if my database is in restricted mode?
- What is difference between physical and logical standby database?
- What is active standby database?
- How do I change a SQL database from read only?
- How do I know if my database is in archive mode?
- How do I know if my database is standby or primary?
- How do I restore a standby database?
- How do you check database mode?
- How do I start a physical standby database?
- How do I get my database out of read only mode?
- Why is my database read only?
- How do I open a standby database in read write mode?
- How do I remove standby database from Dgmgrl?
- How do I make a database read only?
What is a logical standby database?
Logical Standby behaves similarly to physical standby, except it uses a more complex method of applying SQL statements (logical) instead of block level redo changes (physical).
While It is rarely used as a protection mechanism for a primary database it is common to use logical standby as a reporting database..
How do I open a standby database when the primary database is lost?
How to open Standby DB when Primary is lostSTARTUP MOUNT.– Check the status of DB.SELECT DB_UNIQUE_NAME, OPEN_MODE, PROTECTION_MODE, DATABASE_ROLE FROM V$DATABASE;RECOVER STANDBY DATABASE;==> CANCEL.ALTER DATABASE RECOVER MANAGED STANDBY DATABASE FINISH; ALTER DATABASE ACTIVATE PHYSICAL STANDBY DATABASE;ALTER DATABASE OPEN;– Check the status of DB.
What is snapshot standby database?
What Is a Snapshot Standby Database? A snapshot standby database is a fully updateable standby database created by converting a physical standby database into a snapshot standby database. A snapshot standby database receives and archives, but does not apply, redo data from a primary database.
How can I tell if my database is in restricted mode?
SQL> Select logins from v$instance; If the database is restricted mode then it will return RESTRICTED otherwise it will return ALLOWED.
What is difference between physical and logical standby database?
The main difference between physical and logical standby databases is the manner in which log apply services apply the archived redo data. For physical standby databases, Data Guard uses Redo Apply technology, which applies redo data on the standby database using standard recovery techniques of an Oracle database.
What is active standby database?
Active dataguard means, the standby database is open with read only mode, even when redo logs are getting applied in real time. … Reporting queries can be offloaded to standby database.
How do I change a SQL database from read only?
Using SQL Server Management StudioRight-click database you need to mark as read-write.Select “Properties”In the “Database Properties” window select “Options” tab.Scroll down and find “State” tab, go to “Database Read-Only” statement and select “False”
How do I know if my database is in archive mode?
Checking ARCHIVELOG mode statusLog in as OS user oracle and enter the following commands: $ export ORACLE_SID=
How do I know if my database is standby or primary?
One can easily check via SELECT database_role FROM v$database; whether your Oracle database is a primary or standby database.
How do I restore a standby database?
Recover the database using the AUTOMATIC option: SQL> ALTER DATABASE RECOVER AUTOMATIC STANDBY DATABASE; The AUTOMATIC option automatically generates the name of the next archived redo log file needed to continue the recovery operation.
How do you check database mode?
Log in to the database server as the oracle user (Oracle 11g server installation user). Run the sqlplus “/as sysdba” command to connect to the database. Run the select open_mode from v$database; command to check the database status.
How do I start a physical standby database?
8.1. 1 Starting Up a Physical Standby DatabaseStart the database: SQL> STARTUP NOMOUNT;Mount the standby database: SQL> ALTER DATABASE MOUNT STANDBY DATABASE;Start the managed recovery operation: SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE 2> DISCONNECT FROM SESSION;
How do I get my database out of read only mode?
A. Right click on Database, select Properties. And in the Database Properties window, select Options page. In Options page, under State change Database Read Only value to False.
Why is my database read only?
First make sure that the folder in which your . mdf file resides is not read only. If it is, un-check that option and make sure it reflects to folders and files within that folder. Once that is done, Open Management Studio, in the Object Explorer right click on the Database which is read only and select Properties.
How do I open a standby database in read write mode?
SQL> alter database flashback on; SQL> create restore point RP1 guarantee flashback database; Step 7: Activate the standby database to open it in read-write mode. SQL> alter database activate standby database; Step 8: Set the database mode to maximum performance and open the database.
How do I remove standby database from Dgmgrl?
dgmgrl> disable database
How do I make a database read only?
Alternatively, you can right-click the database in SSMS, choose Properties > Options, and set the Database Read-Only state to True. The database icon and name will change in SSMS to indicate its read-only state.