Amount of Users

[AndrewNiederhauser1]

I am looking for a general estimate as to the amount of users our cloud ArcGIS Server environment can handle. I understand that this is a very open-ended question with multiple variables. However, I am simply looking for a baseline estimate. We have a 3 tier system, web server, application server, and database server. Application server is 32GB of RAM and 2 vCPUs, database server is 32GB of RAM and 4vCPUs, web server is 12GB of RAM and 2 vCPUs. Most users will be consuming via ArcGIS Online or Flex apps and doing minor editing and viewing of data. For most maps/apps, the basemap is cached and other services draw dynamically from FGDBs using direct paths unless being edited then they'll use SDE direct connect feature services. We allow 5 instances per service. I have seen the CPT and System Designer tools but am looking for a more generalized estimate since I don't actually know the specs of the physical host servers.

thanks

[GISDev1]

How many services running on ArcGIS Server? Map Services, Feature Services, and GeoProcessing services?
And what kind of editing (moving vertices, drawing complex polygons, etc.?) using what backend database (SQL, Oracle, etc.)?

The 2 vCPUs allocated to the Application Server (I'm assuming this is where ArcGIS Server is installed and running) should probably be bumped up if you're looking at anything over a few concurrent users that will be drawing map services, a tiled cache basemap, along with editing.

[AndrewNiederhauser1]

GISDev01,

Thanks for the reply. At this time we probably have about 100 services running on the app server, where ArcGIS Server is installed (10.1 sp1). 60% map services, 30% feature services, 5% geodata services, and 5% geoprocessing services. Most Feature service edits will involve creating points as well as simple polygons and lines. All other editing will be attribute updates along with photo GDB attachments.

We use SQL Server 2008 R2 as the DB.

I can increase the vCPUs on the application server to 4. If I wanted to accommodate 100 users, would I look to increase the amount of RAM on the application server, increase the vCPUs to 8, or would I be better off by with an additional application server with ArcGIS Server installed with similar resources?

Thanks again,