Oracle database without control file is just like a human body without a backbone. Control file plays the role of the backbone of the database . Being an oracle dba we must know about controlfile . The control file is a file that the Oracle DBMS maintains to manage the state of the database, and it is […]
Monthly Archives: September 2017
Recover from a loss of all redo log members of the CURRENT group
The most crucial and vital structure for recovery operations is the online redo log, which consists of two or more pre-allocated files that store all changes made to the database as they occur. Every instance of an Oracle database has an associated online redo log to protect the database in case of an instance failure. […]
Recover from a loss of all redo log members of an ACTIVE group
In the last post, we have learned about multiple kinds of a recovery scenario. Now in this article, we are going to learn about the steps which are used How to recover from a loss of all redo log members of an ACTIVE group. As we all know what is active group ACTIVE status means that there are […]
Recover from a loss of all redo log members of an INACTIVE group
We all know that redo log has three kinds of a group like active, inactive, current. They all have different use and as well as different meaning.Let’s simulate a loss of all redo log members of an inactive group. If you have completely lost one redo log group your database won’t be able to open. […]
Recover from a loss of one current redo log member of a multiplexed group
Today we are going to learn about the recovery from a loss of one redo log member of a multiplexed group. Being the Oracle DBA we all know the importance of change in normal life as well as database life. A single change in the database makes a huge difference. We all are well known […]
Recover from a loss of the system critical UNDO tablespace on the original location
In this phase of recovery, we are going to have a look on recover from a loss of the system critical UNDO tablespace on the original location. I hope this phase will be useful for you. As we all know that UNDO tablespace stores undo segments, generally used to explicitly (ROLLBACK command) or implicitly (a failed […]
Recover from a loss of the SYSTEM tablespace on different location
This post is about the steps used for recover as from a loss of the SYSTEM tablespace on a different location. As DBA we all are aware of system tablespace that it always contains the data dictionary tables for the entire database. In particular, this example will restore the lost tablespace to another location, just […]
RMAN Configure Backup Optimization Features with Example
RMAN backup optimization is another feature to minimize backup size. Enabling this feature, RMAN BACKUP will skip backup of files that comes in certain condition or exactly identical to the file already backup up. As the name indicates the feature is for optimizing the RMAN backups. When you turn on this backup optimization parameter, RMAN […]
Oracle Cloud (DBaaS): Using dbaascli Utility for Reinstating Operations on Oracle Data Guard
This article was written by Skant Gupta and Joel Perez in Oracle OTN. At the last part of this article we performed Switchover & Failover Operations on Oracle Data Guard using the dbaascli utility. You can read it here: Oracle Cloud (DBaaS): Using dbaascli Utility for Switchover & Failover Operations on Oracle Data Guard Now in this this article we […]
Recover from a loss of the SYSTEM tablespace on the original location
Recovery is an important process for any kind of organization. if the database can not recover properly That is the worst condition of any DBA‘s professional because it causes unlivable loss of an organization. We have many kinds of solutions to restore the database according to the loss of database. We are going to have […]