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3 Tier Application Architecture

JAMES KHOR

Hi there,

Does Atlassian Service Desk server edition follow 3 tiers application architecture?

I went through the documentation and believe there are 3 tiers application architecture. For security requirements, i can install the client on a virtual machine in the web zone, application server on a virtual machine in the app zone and database server on a virtual machine in the DB zone.

Thanks.

Accepted answers

Nic Brough -Adaptavist-

You'll need to explain what you thnk "3 tiers architecture" is here, google gives me four widely differing definitions.

If you really mean the standard 7 tier architecture for web applications, then yes, it does that - OS (user) + client + OS (server side) + application server + application + OS (database) + database. Each layer is independent in itself and could be swapped for something else.

All comments

Nic Brough -Adaptavist-

You'll need to explain what you thnk "3 tiers architecture" is here, google gives me four widely differing definitions.

JAMES KHOR

Hi Nic, can it be confirmed that Atlassian does not have a 3 tier application architecture?

jira application is a web application server that connects to the database in the DB zone.

There is no client application that connects to the JIRA application. To comply to the 3 tier application architecture, I will need to set up a reverse proxy in the web tier in order to access the JIRA application.

Is my understanding correct?

Nic Brough -Adaptavist-

No, because you have not explained what you think a 3 tier architecture is. It clearly means something different to me. What do you mean by "tier" in this?

You say "There is no client application that connects to the JIRA application."

That is completely and utterly wrong. You can't use Jira without one. Whether it's a browser, a script or a dedicated program on a phone, desktop, tablet, car, spaceship or or or, you are using a client application.

I can't tell you about "compliance to 3 tier architecture" as you've not explained what you think it is.

JAMES KHOR

Hello Nic,

The 3-tier application architecture refers to the following.

1. Presentation tier which is the front-end layer that is accessible through a web-based application that displays content to the user. It is often built on web technologies such as javascript, HTML5 and others.

2. Application tier which contains the functional business logic that is written in Java, .NET and others.

3. Database tier comprises of the data storage layer such as mySQL, postgresql.

I understand JIRA service desk as the web application in the application tier that contains the functional business logic. It connects to a DB server in the database tier.

What i don't understand is whether there is a separate web-based application in the presentation tier that connects to JIRA web application in the application tier.

Hope this is clear to you.

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