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Does stickiness in nginx persist across upstream groups?

za flag

I have 4 upstream groups with the same 3 servers in each with different ports defined per group.

Using ip_hash in all those groups, does the stickiness persist across groups if the user is redirected from one to another? Or is it unique within each group?

e.g. user is on server 2 in group 1, and is redirected to group 3. Might it serve the request on server 1 in group 3? Or would it always use server 2 in group 3 in that case?

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