Originally from the User Slack
@Yohan_Mok: Hi team,
We have a couple questions about multi DC clusters.
- Are there documents related to multi DC clusters where some DCs differ in version? Anything related to
inter-DC version compatibility or version upgrade for multi DC clusters would be helpful.
- We understand that upgrading a version in a single DC should respect each minor version(unless the docs say otherwise). Should multi DC clusters also conform to this rule?
@dordor**:** Standard documentation is fine, it’s relatively easy to setup, you do need to read about the CL settings. It’s recommended to have the same version across DCs.
@Yohan_Mok: We wanted to know if there were any documented limitations on version differences between DCs in the cluster.
(eg. DC of version X is compatible up to version Y?)
If this is documented like you say, is it ok if i ask for a link?
> ps. cluster setup was not an issue + we are aware of CL settings and DCAwareRoundRobinPolicy
@Felipe_Cardeneti_Mendes**:** @Yohan_Mok the general direction for single-DC applies. All nodes are part of a cluster irrespective of their placement. In other words: You can’t add a DC with a backleveled major version. As you upgrade one region, you should plan to also upgrade others.
@Yohan_Mok: Thanks for the clarification!