Thread:Project:Support desk/How to use $wgUploadStashScalerBaseUrl?

I got ten about 10k page level wiki using a "common" image wiki. Image files will be sent to "common" wiki server by nfs. However, thumbnail are actually render locally then send to "common". We would like the thumbnail request sent to "common" by $wgUploadStashScalerBaseUrl. But don't know how to set up a point to receive the requests.

I notice wikipedia using following configuration: $wgUploadStashScalerBaseUrl = "//{$wmfHostnames['upload']}/$site/$lang/thumb/temp";

But how the receive side receive and process the request? $wgThumbnailScriptPath to thumb.php?