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Can a DB standby node have a different version than the primary?

Posted October 20, 2020 134 views
DigitalOcean Managed PostgreSQL DatabaseNeeds Product Answer

We have a our database managed by DigitalOcean and a few days ago whilst our DB was overloaded we got a peculiar error in our Rails project which after looking into it quite a bit the only thing that I believe could have explained it, is if the standby node has a different DB version than the primary node. Is this possible in DO?

Unfortunately, I don’t have access to our DO stack at work, to check what exactly happened, but this question is more about curiosity than fixing the bug since it only happened once under very strange conditions.

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keeyan
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keeyan
edited by bobbyiliev

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dikshith October 22, 2020

Hey there,

No, it’s not possible and Standby nodes are exact copies of the primary node (including DB version) that automatically take over if the primary node fails. You might have to look into it further to find the root cause but that won’t be the reason for sure.

If you have any logs or behavior which you can explain then you can reach out to support for more clarity.

-Dikshith

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