Fleet is only for running services. It is effectively a distributed systemd. Mesos can schedule resources for multiple different frameworks. It can run service

Fleet is only for running services. It is effectively a distributed systemd. Mesos can schedule resources for multiple different frameworks. It can run services with Marathon or Aurora frameworks. But it can also run cron jobs and batch pipelines with Chronos or Aurora. It can also schedule the distributed tasks for Hadoop or Spark.