The maintenance framework has several mechanismes built-in that enable you to limit the execution of a maintenance job to specific servers.

This is useful if only a few servers have the necessary software installed to execute these maintenance jobs successfully.

Let's briefly explain the options:

• Priority: this is the option that most developers know because it has been a feature of ADAM since version 3. When executing the maintenance manager using Adam.Core.CommandLine, one can use the -priorities argument to control which maintenance job priorities should be executed.
  
  To create such a job, simply set the Priority-property:

  RecordMaintenanceJob job = new RecordMaintenanceJob(app);
  job.AddNew();
  job.Targets.Add(new RecordMaintenanceTarget(someRecordId));
  job.Actions.Add(new UpdateFullTextAction());
  job.Priority = 43;
  job.Save();

  To execute only jobs of certain priorities:
  Adam.Core.CommandLine RunMaintenanceJobs -priorities=10-20,40-50

• Machine Affinity: Since ADAM 4.4, we have a feature that allows you to limit the execution of a maintenance job to one specific server. All you need to do is set two properties when submitting the job:
  

  RecordMaintenanceJob job = new RecordMaintenanceJob(app);
  job.AddNew();
  job.Targets.Add(new RecordMaintenanceTarget(someRecordId));
  job.Actions.Add(new UpdateFullTextAction());
  job.MachineAffinity = true;
  job.MachineName = "MEDIASRV";
  job.Save();

  To execute these jobs, simply run the RunMaintenanceJobs command on this server. ADAM will automatically ensure that only the correct server executes this job.
  
• Site Affinity: ADAM 4.5 goes one step further. Now you can also limit the execution of a maintenance job to a specific ADAM Site. This enables you to limit the execution of a maintenance job to any EMEA server or any US server for example.
  

  RecordMaintenanceJob job = new RecordMaintenanceJob(app);
  job.AddNew();
  job.Targets.Add(new RecordMaintenanceTarget(someRecordId));
  job.Actions.Add(new UpdateFullTextAction());
  job.SiteId = theUSSiteId;
  job.Save();

  By default, RunMaintenanceJobs executes any jobs that don't have any site affinity specified or that are assigned to the site RunMaintenanceJobs is executed on. By specifying the -siteOnly argument, RunMaintenanceJobs only executes the maintenance jobs that have site affinity set to this site.
  
  For example:
Adam.Core.CommandLine RunMaintenanceJobs -siteOnly