From single to multiple OJS installs

How does this affect indexing on google and Google scholar.
Do they index again with out any duplicate content issues.

Not sure if I’m understanding you.

Splitting your OJS installation don’t mean you will need to change your public urls.

Imagine you have a multi-tenant OJS with the following urls:

You can split in two different single-tenant OJS like this:

So for the searchers, at journal level, all the urls will be the same.

And notice “https://myojs.org/” (root level) will be a free url where you will like to place a WP, drupal or whatver you like to emulate the multi-journal index page OJS offers in case of multi-tenant installations.

If you like to see a real life example, this is how our service is built.

Because, the old domain url is different and new url is different. Does google/google scholar index these pages again, as i am creating the duplicate of the same content on a new domain.

The trick is keeping the urls intact.
If an article was “https://foo.org/journal01/article/view/urlslag”, after splitting the url need to be the same.
Google won’t notice any change.

One my concern about OAI, but they will keep working as usual under journal’s urls like:

I am asking specifically, because, google scholar stopped indexed the articles in the old domain.
I have tried multiple ways to get it indexed.

If you are splitting your installation only for this, I recommend you posting asking about your Scholar issue instead.

I mean, I see a lot of benefits in the single-tenant approach, but you need to be convinced because it will meen keeping N ojs and, if you don’t have this automatized, it could be overwhelming.

I am thinking that splitting and moving to a new domain would help to index the articles in google scholar.

Did somebody in PKP recommend you to do this?
Not a googleScholar expert… and everything started with google is a blackbox to me.