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• 11-06-2009, 6:48 PM

  jessev Joined on 11-06-2009, 11:40 PM Posts 1

  Custom ARR LB algorithm logic for Querystring rule Reply Contact Hello; I have a website which has two request types per view: 1) Is an aspx page with a querystring. 2) Is a "file" which has a filename of the querystring from (1) base-64 encoded. This "file" is rewritten to page.aspx?query=<filename> by the LB machines.   A client will request (1), then (2). The problem is that both (1) and (2) need to be routed to the same application server. The reasons for this setup are necessary, but difficult to explain, sorry. Given these requirements, we tried using IP-based affinity (our client doesn't respect cookie affinity). This worked until we were behind a CDN. Now the client IP is hidden, there are no client-based request headers, and so all requests are hitting the same server. Ideally, I'd like to be able to hash both (1) and (2) to the same randomly chosen application server. This seems like it would require some base64 logic in the Querystring rule, but maybe not.  Any thoughts? Thanks!

  Tags: ARRv2

• 11-12-2009, 7:04 PM

  In reply to

  anilr Joined on 05-23-2006, 10:13 PM Redmond, WA Posts 2,343

  Re: Custom ARR LB algorithm logic for Querystring rule Reply Contact You will have to write a module (native or managed) to extract the common value from the url and set a server-variable with that value.  You can then configure ARR to do server-variable hash-based load balancing where the server-variable used for hashing is the one your module is setting. Anil Ruia Senior Software Design Engineer IIS Core Server