Scheduler Service Configuration

The Scheduler Service will look for an XML file in /etc/scheduler_config.xml containing the configuration to be used. This DTD descibes the structure of the scheduler configuration file:

<!ELEMENT SchedulerConfiguration (Resource*, Activity*)>
<!ELEMENT Resource EMPTY>
<!ATTLIST Resource
  id         ID #REQUIRED
  total      CDATA #REQUIRED>
<!ELEMENT Activity (Consume*)>
<!ATTLIST Activity
  name       CDATA #REQUIRED>
<!ELEMENT Consume EMPTY>
<!ATTLIST Consume
  id         IDREF #REQUIRED
  amount     CDATA #REQUIRED>

Consider the following example scheduler configuration file:

<?xml version="1.0"?>
<!DOCTYPE SchedulerConfiguration SYSTEM "scheduler.dtd">
<SchedulerConfiguration>
  <Resource id="cpu" total="5"/>
  <Resource id="tuner" total="2"/>
  <Activity name="record_sd_from_ip">
    <Consume id="cpu" amount="2"/>
  </Activity>
  <Activity name="record_hd_from_ip">
    <Consume id="cpu" amount="3"/>
  </Activity>
  <Activity name="record_sd_from_tuner">
    <Consume id="cpu" amount="2"/>
    <Consume id="tuner" amount="1"/>
  </Activity>
  <Activity name="record_hd_from_tuner">
    <Consume id="cpu" amount="3"/>
    <Consume id="tuner" amount="1"/>
  </Activity>
  <!-- Does not consume any resources -->
  <Activity name="notification"/>
</SchedulerConfiguration>

This configuration will cause the scheduler service to enforce the following limitations:

• Only one DVB (tuner) recording at a time.
• Only one HD recording at a time.
• Only one SD recording at the same time as an ongoing HD recording.
• A maximum of two SD recordings when there is no ongoing HD recording.