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Can a physical standby database receive the redo SYNC if the Far Sync...
The answer is YES. In the following configuration, cdgsima_lhr1pq (primary) sends synchronously to cdgsima_farsync1 (far sync), which forwards the redo stream asynchronously to cdgsima_lhr1bm (physical...
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Far Sync and Fast-Start Failover Protection modes
Oracle advertises Far Sync as a solution for “Zero Data Loss at any distance”. This is because the primary sends its redo stream synchronously to the Far Sync, which relays it to the remote physical...
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Check, check… Does the mic still work? #JoelKallmanday
Update PHP: Update WordPress: New content: It’s almost six months without blogging from my side. What a bad score! It’s not a coincidence that I’m blogging today during #JoelKallmanDay. A day that...
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Find Ludovico at Oracle Cloud World 2022!
Are you attending OCW, and do you want to find me and know more about how to avoid downtime and data loss? Or how to optimize your application configuration to make the most out of MAA technologies? Or...
View ArticleVideo: The importance of Fast-Start Failover in an Oracle Data Guard...
Why is Fast-Start Failover a crucial component for mission-critical Data Guard deployments? The observer lowers the RTO in case of failure, and the Fast-Start Failover protection modes protect the...
View ArticleVideo: Where should I put the Observer in a Fast-Start Failover configuration?
The video explains best practices and different failure scenarios for different observer placements. It also shows how to configure high availability for the observer. Here’s the summary: Always try...
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When it comes to using Oracle, trust Oracle…
A month ago, I saw this article published on the AWS architecture blog: Disaster Recovery for Oracle Database on Amazon EC2 with Fast-Start Failover I love seeing people suggesting Oracle Data Guard...
View ArticleDoes FLASHBACK QUERY work across incarnations or after a Data Guard failover?
Short answer: yes. Let’s just see it in action. First, I have a Data Guard configuration in place. On the primary database, the current incarnation has a single parent (the template from which it has...
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New in Data Guard 21c and 23c: Automatic preparation of the primary
Oracle Data Guard 21c came with a new command:prepare database for data guard with db_unique_name is {db_unique_name} db_recovery_file_dest_size is "{size}" db_recovery_file_dest is "{dest}" ;This...
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New views in Oracle Data Guard 23c
Oracle Data Guard 23c comes with many nice improvements for observability, which greatly increase the usability of Data Guard in environments with a high level of automation. For the 23c version, we...
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