Oracle Data Guard, Oracle Data Guard Broker and Oracle Active Data Guard are the commercial names for technologies that allows physical and logical standby (slave) databases to be configured and managed with Oracle Database Enterprise Edition

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Standby controlfile error

I am doing dataguard. I have manually done a backup for the standby database. It was working fine. Problem arose when I used the standby controlfile. On the primary, I have created a standby ...
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Gap resolution of Logical Standby Database via Archive Log Backups

Due to reasons outside the scope of this question, we had to flashback our Logical Standby Database (at the VM level) to the previous day. So, now i'm trying to resolve gaps in missing archivelogs ...
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Differentiating physical standby to cascaded standby

Why is it that for non-real time apply from cascading to cascaded standby that we have to mention as SYNC as the redo transport mode? Ideally we mention SYNC for real time apply right? Also, should ...
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Strange error in trace file for NSAn standby process

One of the Oracle databases I help manage is the primary in a standby configuration, with two standby databases. I started finding repeated entries in the alert log on the primary for a failure to ...
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Oracle dataguard - Redo apply

In a low bandwidth environment when a transaction commits that generates a large amount of redo data will cause other independent transactions to slow down. This is because the redo data of small ...
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Dataguard: preventing logical standby to loose track after flashback database on primary

We have 2 Oracle databases; a primary and a logical standby, configured with Dataguard. Whenever we have an application rollout on the primary, we create a restore point in case anything goes wrong. ...
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Sync oracle DBs using archive log when not connected to each other

I'm trying to synchronize 2 dbs which are not connected to each other, and located in a separated networks. The 'copy db' (aka: standby) can be read only, but still should be active. My intuition (...
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What is the nature of “LGWR: Setting 'active' archival for destination LOG_ARCHIVE_DEST_2”?

I'm not sure when this started, but for the time being the primary database instances in a physical standby configuration logs this message on every redo log switch. *********************************...
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From RAC to Standby RAC With Active Dataguard

I have oracle database 11.2.0.3 with RAC feature , with 2 node on oracle linux 6.4 : ol6-112-rac1 and ol6-112-rac2 I want to create active data guard with RAC feature from this database , these ...
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Oracle Primary alert log error

I have a data guard setup operating in max performance mode. While checking the alert log entry of primary I observed this: I have checked the database roles, its showing properly as primary and ...
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Strange entry in alert log - Oracle

I'm having a primary database which is a single instance database and it has a standby database running in maximum performance mode. Recently I added standby redo logs in my standby database and after ...
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ORA-12514: TNS:listener does not currently know of service requested in connect descriptor at the time of switchover using data guard broker

I have a oracle data guard setup with nodes - one as primary and other as physical standby. I also, have configured the data guard broker on it. The problem is when I tried to switch over , I just ...
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Oracle 10gR2 Data Guard Switchover

I need some help! I have a scenario of oracle 10gR2 database replication using data guard. I have selected the data guard command line interface. After my initial setup I can ship and apply logs from ...