Is Atlassian onDemand architecture multi tenant or single tenant?

I am just curious on how atlassian is providing its ondemand services and their internal architecture behind onDemand.

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OnDemand is partially multi-tenant (we have a a few shared services, e.g. the login system) but is mostly still single-tenant. Each customer has an OpenVZ container that has a database and multiple Tomcats running within (one per application).

You can view the slides from this Atlassian Summit presentation for more information. The info here is a bit dated but the funamentals remain the same.

We are working on 'multi-tenantising' more parts of the OnDemand offering, but (as I'm sure you can appreciate) this is a slow process.

Thanks a lot michael for clarifying.

Hi Norman, Thanks for replying. I have already seen that link. But one more link, from which I get confused because earlier atlassian was telling the benifits of single tenant over the multi tenant model. And I have read in the following link that they have used single tenant model for JIRA studio.

Jira Studio was an earlier attempt at SasS. They have shutdown that website as noted below.

I don't exactly see how it's multi-tenant, technically speaking. It's still an instance per organization etc. There are multiple Tomcat instances (in fact per Atlassian software and can't even be combined). It's multiple single-tenant software.

Though as long as things work...

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