Entry for queueing interactive experiments

www/faq.html

@@ -35,6 +35,8 @@
      <li> <a href="#UTT-TOPO">Are there any constraints on my topology?</a>
      <li> <a href="#UTT-NODES">How many nodes can I ask for?</a>
      <li> <a href="#UTT-HOWLONG">How long can I keep using my nodes?</a>
+     <li> <a href="#UTT-QUEUE">I only need a couple of nodes but none are
+     				free, should I just keep trying?</a>
      <li> <a href="#UTT-TOOFEW">What if I need more nodes than are free?</a>
      <li> <a href="#UTT-2">Do I get root access on my nodes?</a>
      <li> <a href="#UTT-3">Do my nodes have consoles I can look at?</a>
@@ -417,6 +419,34 @@
     is important to leave as many nodes available as possible.
     </p>
 
+<li><a NAME="UTT-QUEUE"></a>
+    <font size='+1'><b>I only need a couple of nodes but none are free,
+      			should I just keep trying?</b></font>
+    <p>
+    It is better for you and us if you don't just keep hitting the
+    submit button every few minutes.  It wastes your time and floods
+    us with email (we get every failure message you do!)
+    Instead, you can now use the
+    <a href="tutorial/tutorial.php3#BatchMode">Batch System</a>
+    to queue an interactive job.  By submitting your experiment as
+    a batch job, but without any
+    <a href="tutorial/tutorial.php3#Startupcmd"><tt>tb-set-node-startcmd</tt></a>
+    directives in your NS file, the job will be queued until nodes are
+    available.  For most experiments, this means just using your regular
+    NS file, and checking the Batch Mode Experiment box when you create
+    the experiment.
+    </p><p>
+    When your queued job is swapped in, you will be sent email to
+    inform you, and you can start working!
+    <b>Please note</b> that the
+    experiment will be idle when it is swapped in, and will be
+    <a href="swapping.html#idleswap">idle swapped</a> if you do not
+    get things running on the nodes in a short period of time.  If your
+    experiment does get swapped out before you can get to it, you can
+    always visit the experiment's information page and try again by
+    using the Queue Batch Experiment menu item.
+    </p>
+
 <li><a NAME="UTT-TOOFEW"></a>
     <font size='+1'><b>What if I need more nodes than are free?</b></font>
     <p>

www/tutorial/tutorial.html

@@ -981,6 +981,12 @@ regular experiment and a batch mode experiment:
 </ul>
 <p>
 
+The batch system may also be used for "queuing" interactive experiments.
+By leaving out <tt>tb-set-node-startcmd</tt> commands, an experiment
+will be started when enough nodes are available, but then remain active
+until you (or the system) swap or terminate it.
+<p>
+
 <li> <a NAME="BatchExample"></a>
      <h3>A Batch Mode Example</h3>