DG BROKER COMMANDS . How to configure Data Guard broker: 1.Start the DMON process on both the primary and standby databases: SQL> ALTER SYSTEM SET DG_BROKER_START=TRUE SCOPE=BOTH; System altered.2.Set the log_archive_dest_2 settings from both the Primary and Standby databases to be nothing , then try to create the broker configuration (it will automatically set the log_archive_dest_n when you. -- The DATABASE_ROLE should be STANDBY as that is what this script is intended to be run on. -- PLATFORM_ID should match the PLATFORM_ID of the primary or conform to the supported options in -- Note: 413484.1 Data Guard Support for Heterogeneous Primary and Physical Standbys in Same Data Guard Configuration . Summary 1. Check the name and status of database. 2. Check for GAP on standby 3. Check redo received on standby 4. Check redo applied on standby 5. Identify missing archive log files 6. Copy archive log files 7. Register archive log files wit
Hi, Standby archive logs should be falling behind by 2 than Primary archive logs. For example: If standby archive logs are at -> 498 Primary archive logs are at -> 500 Then alert mail should be sent to email@example.com with the message standby logs are behind primary Thanks for your help and time!! Regards SQL>alter database start logical standby apply immediate; --- to start. SQL>ALTER DATABASE STOP LOGICAL STANDBY APPLY; -- TO STOP. The best practice would be schedule a script to monitor this process every 60/30 min. Below script will keep track of the SQL apply process and throw alert if it doesnt meet the condition 7.1 Prerequisites for Getting Started. One of the prerequisites for using DGMGRL is that a primary database and any standby databases must already exist. The DG_BROKER_START initialization parameter must be set to TRUE for all databases in the configuration. You must use a server parameter file with the broker (see Section 2.1 and Section 8.1.3).. Convert the initialization parameter files.
On the machine where the Standby Database is running we need to run the following script: $ cd /var/opt/oracle/dataguard $ ./make_me_primary.sh. After the switchover is completed, we need to run the following script on the machine where the former Primary (now new Standby) database is running: $ cd /var/opt/oracle/dataguard $ ./start_recovery.s In standby setup, archives log from primary shipped to standby and applied there. But if the primary database crashes, then the online redo logs will stay in primary side. As these logs hasn't been archives, means those won't be applied to standby, Which results in data loss Oracle Dataguard physical Standby configuration in 19c: Overview steps: Step:1 we have to enable the archive log mode ,flashback on primary databases.. Step:2 Then enable the force logging option.By enabling the force logging option it helps us to capture all the changes made in the database and available for recovery in the redo logs.. Step:3 Add the redolog files for standby database,it is. Monitor Data Guard Recovery Progress on Standby Sites. Determining the progress of the recovery process is essential before switchover to a standby database. Moreover, the recovery progress should be monitored periodically in order to find the lag between the primary database and the standby database . Verify the standby redo log file groups were created
In the primary and secondary database of the SQL Server instance, the alert configuration will reside in the tables of the msdb database. In the log shipping for primary database, log_shipping_monitor_primary table is there, and for the secondary database table, named log_shipping_monitor_secondary is there Examine views to monitor Primary and Physical Standby Databases using SQL*Plus; NOTE: This OBE represents a Data Guard configuration where orcl is the primary database and standby1 is the physical standby database SID. For simplicity, in this OBE, both the primary and standby databases are running on a single server RMAN Incremental Backups to Roll Forward a Physical Standby Database. What Is an Archive Gap:-. An archive gap is a range of archived redo logs created whenever the standby system is unable to receive the next archived redo log generated by the primary database
Without Active Data Guard, you need to do the SCN to timestamp conversion on the primary. Or read the SCN from the datafiles, but this is not the latest apply but the lastest checkpointed: SQL> alter session set nls_date_format='dd-mm-yy hh24:mi:ss'; Session altered Monitoring Data Guard Log Shipping using Shell Script with Mail alert Version:- Oracle 11g Now lets create the shell-script which will monitor the log gap in between of primary and standby database:-From oracle user. mailx -s Attention!! There is a loggap between Primary and Standby Database at `date` BETWEEN CCUINE23 AND CCUINE103. I am Founder of SysDBASoft IT and IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience.I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource.I have done 200+ Operations in this clients. The primary database and standby database cannot share the same control file. If you place your primary and standby databases on the same host, some operating systems will not allow you to mount two instances with the same database name on the same machine simultaneously. Workarounds for this situation exist for every platform Creating Oracle DR/Standby synchronization report using Python scripting. Dear Readers, In my previous posts, I discussed about tablespace/FRA/RMAN backup/Patchset level monitoring/DB inventory using python. Here comes my new python code for generating DR/Standby synchronization status report from the list of databases provided in the DB list
The following script needs to be run on the Primary Database. Do not worry, the script doesn't has a shutdown command í ½í¹‚ In addition to the above scripts, this script helps in monitoring the standby. It basically lists out the last archive that has been received on the standby and also the last archive sequence that has been applied on. The following script, to monitor Dbvisit Standby with Nagios, status echo echo --status SID echo Check the state of the Database echo and print out the state standby or Primary } case $1 in 1) cmd When you use the check_oracle.sh plugin you get errors on the Standby Database because its not open and no was accepted. Standby Database Hi Tom,I am in the process of setup the standby database for my production database. I have gone through with couple of doucments. Most of the things are clear to me, but still there are some comfusion:1. Do I need to have totally separate hardware (Harddisk, controller etc.) or Can I create
Check the primary database is in sync with standby database or not. At Primary Side: Oracle Sample Unix script to monitor select query during Load Test; Previous Post: Ease of DB Administration Via SecureCRT. Next Post: Difference b/w Common user and Local user in Oracle 12c There is a checkbox to choose whether or not you want to swap monitoring settings between the primary and standby databases. I check the box as this is a good thing, but as the text says you have the option to NOT swap the monitoring settings and instead use your own detailed monitoring templates for each system and apply them after the switchover Examine views to monitor Primary and Physical Standby Databases using SQL*Plus; NOTE: This OBE represents a Data Guard configuration where orcl is the primary database and orclsby1 is the physical standby database SID. For simplicity, in this OBE, both the primary and standby databases are running on a single server The script can also be customised so as to email an alert notification if the standby and the primary go out of sync by say 5 log files. Drop me a line if you need that customisation script. This report is based on a Unix shell script (check_logship.sh) which in turn calls a SQL script (check_logship.sql)
Cool. Another good idea. If I've switched Primary/Standby back and forth a few times, both their alert logs will show Media Recovery Waiting in them, but at least the dates (provided by your egrep -B) will help. Here might be a problem case: Suppose San Jose is Primary and Boston is Standby and in MRP. Suppose San Jose has never yet been a. Standby Server. On the standby database, run the ALTER DATABASE RECOVER MANAGED STANDBY DATABASE command to start redo apply.The USING CURRENT LOGFILE means the redo is applied as soon as it is received on the standby.The DISCONNECT option means the redo apply will run in background session With the EM it is very much possible to create new standby for the primary database, Checking Standby database progress summary, configuring the Data Guard options like Real-Time Query, Flashback, and Enabling/Disabling Broker so on and including monitoring the Data Guard Configuration This is the second installment of a two-part series on 2ndQuadrant's repmgr, an open-source high-availability tool for PostgreSQL. In the first part, we set up a three-node PostgreSQL 12 cluster along with a witness node. The cluster consisted of a primary node and two standby nodes. The cluster and the witness node were hosted in [
In this article, we will see the creation of DataGuard with 2 node RAC Primary Database and 2 node RAC Standby database. Primary Database Standby Database Primary Instance Standby Instance RACDB DGRACDB RAC1 DGRAC RAC2 DGRAC1 What I have already done 1. My production database is up and running with 2 node RAC Oracle Version [ Dbvisit Standby Version 7, renames the archive logs when it copies them from the Primary to the Standby.But if for some reason you have to do it manually once-off, you have two options: Copy the archive logs from primary to standby (Dbvisit ARCHDEST location), rename the files and then run dbvisit to apply logs Step 4: Now that we are certain that the secondary database is in standby mode, our goal is to change the state to restoring mode to prevent read operations and make the database inaccessible to users. Here we will change this setting in SQL Server Management Studio on primary database server. First connect to primary database server in SQL Server Management Studio
Another script should check for the gap between production online log and the log stream received by the standby database. This is NOT the gap of online log APPLIED to the standby database. THIS IS THE GAP OF ONLINE LOG TRANSMITTED TO THE STANDBY RFS PROCESS and can be used to monitor your dataguard transmission from production to disaster. If you want you can read more about the different standby databases or snapshot standby databases in particular. Pro Tip 2: Monitoring Queries When you have created the standby database in OCI and are waiting for the switch-over you can use these commands for monitoring Standby database to start behaving as Primary database.. The following conditions must be met before you can use the broker: Primary and standby DB's must be on same version You must use a SPFILE to ensure the broker can persistently reconcile values between broker properties. DG_BROKER_START parameter must be set to TRUE
Dataguard - Client failover on standby database configuration How can the clients automatically connect to the new Primary database (previously Standby database) in case of failover/switchover using Tnsnames.ora without changing tnsnames.ora file on each client machine. Do I have to make two listeners on each server and a common service name A standby database is an exact copy of the primary database. Everything in the primary database is also in the standby database. This included all tablespaces, users, grants, and database objects. The standby also maintains copies of all the datafiles. Every change in the primary database is applied to the standby using redo apply These checks are mainly Database connectivity checks. We validate that the primary and standby databases are in the correct expected state. For example, the primary should be in open read, write state, where the standby should be either in read-only or recovery state. User Checks - also referred to as the User Script chec Oracle Data Guard still offers support for the venerable logical standby database in Oracle Database 11g. This article, investigates how data warehouse and data mart environments can effectively leverage logical standby database features, but simultaneously provide a final destination when failover from a primary database is mandated during disaster recovery
Enter your email address to follow this blog and receive notifications of new posts by email The primary will show this in the log: LOG: standby walreceiver is now a synchronous standby with priority 1 The standby will show: LOG: database system was interrupted; last known up at 2018-10-24 15:49:55. LOG: entering standby mode. LOG: redo starts at 0/3000028. LOG: consistent recovery state reached at 0/30000F Before you delete any files on the primary database, you should be sure you no longer need them for the recovery of the standby database. Initial configuration When you use the Data Guard Broker for the configuration of your standby database, it will create a remote archive destination on the primary, connecting to a service on the standby. The following custom monitor script has failed on a standby node. The agent will stop monitoring the local database. Script location: script_name Script output: script_results. Primary custom monitor failure for cluster cluster_name. The following custom monitor script has failed on a primary node. EFM will attempt to promote a standby
I too was frustrated by the lack of exposure of the apply rate to the standby. I wrote this script years ago using more common views and extrapolated the necessary information. rem Script: get_redo_apply_metrics.sql rem Reports standby apply rate with lag rem set lines 120 pages 60 column SizeM format 9,999.9 column MB/sec format 9,999.9 To configure a dual standby Azure-SSIS IR pair that works in sync with Azure SQL Database failover group, complete the following steps. Using Azure portal/ADF UI, you can create a new Azure-SSIS IR with your primary Azure SQL Database server to host SSISDB in the primary region Log shipping in SQL Server is the process of enabling an automatic backup of the complete database and transaction files of the primary server and then restoring the backup on a secondary server. Being a high-availability solution, it increases the database availability of SQL Server by creating a backup server that can replace the primary server in case of data disasters Important. When you change a secondary database to the primary database, to provide a consistent experience to users and applications, you might have to re-create some or all of the metadata for the database, such as s and jobs, on the new primary server instance # Purpose script: # This script checks if standby and primary are in sync and if standby is in mode READ ONLY WITH APPLY # violations will be mailed to recepients defined in this script. # # Usage script: # Place this script on the standby database server in /home/oracle/scripts # The following changes will be necessary when implementing this.
shell script to check archivelog gap between standby and primary(DG sync monitoring script) below script can be used to find archivelog gap between primary and standby. if shipping gap or apply gap is greater than or equal to 5 you will get mail(you can change the number if you want in if condition) The following tips will help you in monitoring sync between primary and standby databases. 1. Check for GAP on standby 2. Check redo received on standby 3. Check redo applied on standby Solution: Execute following queries: A
Recovering standby database if archive is missing , using rollforward standby using incremental backup. 1) After recovery in step above to sqlplus and get the current scn from standby database Oracle Database Exadata Cloud Machine - Version N/A and later Oracle Database Exadata Express Cloud Service - Version N/A and later Oracle Cloud Infrastructure - Database Service - Version N/A and later Information in this document applies to any platform. Goal. How to shutdown Primary or Standby database in a Data Guard setup for maintenance.
When the primary aborts due to a failover condition, the observer will attempt to reinstate the old primary as the standby when the standby is mounted and the observer senses the mount. At that point, the observer will use flashback database to flash the database back to the failure point, and instantiate it as the new standby database in. IMPORTANT: Before configuring a new complete Data Guard environment via the Data Guard tab, you should add to monitoring its Primary database and Standby database using the Oracle Instances > Monitor dashboard; otherwise you will not be able to add these databases to the configured Data Guard environment. Creating a new Data Guard environment via the Data Guard tab is an optional feature which. Next step is to OPEN the standby database in read write mode as suggested by the Physru.sh script. Now at the Primary Site Run again Physru script. In this step, the primary database will become the logical standby database and logical standby database become primary database but it has db_unique_name=finan which is running on 18.104.22.168.0
On primary we have +DATAC2 and on standby we have +DATAC1. So if we create a control file for standby from primary database, it has location as +DATAC2. Now we start the standby database with this control file, will it automatically change the location to +DATAC1? Do we need to manually update that. Is there any other way to work around this Run the HADR monitor script to show that it is exiting with a 2 (offline) on the primary server and a 1 (online) on the standby. The following is an example of the location and syntax to run the HADR monitor script on each server -- The following 3 database server used for primary, standby and catalog database and backup taken from standby database-- TESTDB1: Primary Database-- TESTBD2: Standby Database-- CATDB : Catalog Database-- Create Catalog User CREATE USER rman IDENTIFIED BY rman123 TEMPORARY TABLESPACE temp DEFAULT TABLESPACE RMANCAT QUOTA UNLIMITED ON RMANCAT Data Guard Broker is the management and monitoring component with which you configure, control, and monitor a fault tolerant system consisting of a primary database protected by one or more standby database.Data Guard can be used in combination with other Oracle High Availability (HA) solutions such as Real Application Clusters (RAC), Oracle.