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Jérôme Dubar

Configure Data Guard with odacli on ODA

By | Database Administration & Monitoring | No Comments

Introduction I always thought integration of Data Guard was a missing feature on Oracle Database Appliance. For sure, you can configure Data Guard manually as you do on a classic server, but as an appliance, ODA should have proposed an easier way for configuring that. After years of waiting for this feature, it’s now available, and I just tested it. And I’m here to give you my feedback. Disclaimer You’ll need 2 ODAs for building…

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Franck Pachot

Oracle MAA reference architecture and HA, DR, RTO, RPO

By | Oracle | No Comments

By Franck Pachot . I may have mentioned in some previous blog post that, in my opinion, the names of Oracle Database features make sense on the vendor product management context more than in a user context. I’m not saying that it is good or bad. There are so many features, that can be combined, and that evolved for many years. The possible use cases is unlimited. What I see customers doing in Europe is…

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Marc Wagner

How to migrate High Availability databases on an ODA?

By | Oracle | One Comment

Through this blog, I would like to show, with a real customer case, how I have been migrating databases in High Availability environment on an ODA. High Availability using Data Guard for Oracle Enterprise Edition or dbvisit for Oracle Standard Edition 2. One of the advantage here would be to use the Standby Database as fallback in case there would be some application issue with new database version. Although, I would expect that for any…

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Mouhamadou Diaw

Oracle 20c Data Guard : Standardization of Client-Side Broker Files

By | Database Administration & Monitoring, Database management, Oracle | One Comment

In an Oracle 20c Data Guard environment with a broker configured we can have following files called client-side broker files -The observer configuration file : observer.ora -The observer log file -The observer runtime datafile: fsfo.dat -The fast-start failover callout scripts (new feature in Oracle 20c) Before Oracle 20c, there was no default location for these files. Starting with Oracle 20c, now we can define a default location for all these files by setting an environment…

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Jérôme Dubar

ODA: odacli now supports Data Guard in 19.8

By | Database Administration & Monitoring, Database management, Hardware & Storage, Operation systems, Oracle | 2 Comments

Introduction I’ve been dreaming of this kind of feature: just because most of the ODA configurations now include Disaster Recovery capabilities, through Data Guard or Dbvisit standy. If Dbvisit will obviously never be integrated to odacli, the lack of Data Guard features is now solved by the very latest 19.8 ODA software appliance kit. How Data Guard was implemented before 19.8? Those who have been using ODA and Data Guard for a while know that…

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Franck Pachot

A Serverless Standby Database called Oracle Autonomous Data Guard

By | Cloud, Database Administration & Monitoring, Oracle | No Comments

By Franck Pachot . Announced by Larry Ellison last week, here it is: the Autonomous Data Guard. You can try it, unfortunately not on the Free Tier. First you create an Autonomous Database (ATP or ADW) and then you enable Autonomous Data Guard. You know that “Autonomous” is the marketing brand for the services that automate a lot of things, sometimes based on features that are in Oracle Database for a long time. So let’s…

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Mouhamadou Diaw

Oracle Data Guard RedoRoutes : What is Priority 8 ?

By | Database Administration & Monitoring, Oracle | One Comment

When dealing with cascading or far sync in a Data Guard environment, it is important to understand how to configure the RedoRoutes property. By default, a primary database sends redo to each transport destination that is configured in the destination. We can create more complex transport topology, depending of our environment, using the RedoRoutes property. Basically the RedoRoutes property has this format (redo_routing_rule_1) [(redo_routing_rule_n)] Where each routing rule contains a redo source field and a…

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Franck Pachot

Some myths about PostgreSQL vs. Oracle

By | Oracle, Postgres | One Comment

By Franck Pachot . I originally wrote this as a comment on the following post that you may find on internet: https://www.2ndquadrant.com/en/blog/oracle-to-postgresql-reasons-to-migrate/ but my comment was not published (many links in it… I suppose it has been flagged as spam?) so I put it there. You should never take any decision on what you read on the internet without verifying. It is totally valid to consider a move to Open Source databases, but doing it…

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Mouhamadou Diaw

Oracle 20c : Create a Far Sync Instance Is Now Easy

By | Database Administration & Monitoring, Oracle | No Comments

A far sync instance is like a standby instance as it can receive redo from the primary database and can ship that redo to other members of the Data Guard configuration. But unlike a physical standby instance, a far sync instance does not contain any datafiles and then can not be open for access. A far sync instance just manages a controlfile. A far sync instance cannot be converted to a primary instance or any…

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Franck Pachot

티베로 – The AWR-like “Tibero Performance Repository”

By | Database Administration & Monitoring | No Comments

By Franck Pachot . In a previous post I introduced Tibero as The most compatible alternative to Oracle Database. Compatibility is one thing but one day you will want to compare the performance. I’ll not do any benchmark here but show you how you we can look at the performance with TPR – the Tibero Performance Repository – as an equivalent of AWR – the Oracle Automatic Workload Repository. And, as I needed to run…

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