Configuring load Balancing for sandboxed solutions
You can choose one of two load-balancing scenarios for sandboxed solutions. Depending on the load balancing scenario, Microsoft SharePoint Server 2010 determines which server is running the solution on. If load balancing is local, the solution is run on the same server as the service request. If load balancing is remote, select the server that is running the solution based on the solution affinity. In both cases, the server must run the sandbox service.
The more you isolate the sandbox solution, the better you can protect the main parts of the SharePoint Server Web site, bypassing code that might consume too much resources. You can increase isolation by using remote load balancing and running sandbox services only for specific servers.
By default, load balancing is remote.
To configure load balancing operations using Central Administration:
1.1. Verify that you have the following administrative credentials:
To configure load balancing for a sandboxed solution, you must be a member of the Farm Administrators Group on the computer that is running the SharePoint Central Administration site.
1.2. On the home page of the SharePoint Central Administration site, click System Settings.
1.3. Under Farm Management, click Manage User Solutions.
1.4. On the Sandbox Solution Management page, in the Load Balancing section, select one of the following options:
L All sandbox code runs on the same machine as a request. This load balancing scenario runs sandbox code on the same server that handles the remaining requests.
L run sandboxed code requests are passed by solution similarity. This load balancing scenario selects the server to run the sandbox code based on the solution similarity.
1.5. Click OK.