mon_fsstatd – Monitor z/VM guest file system size

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The mon_fsstatd command is a user space daemon that collects physical file system size data from Linux® on z/VM®.

The daemon periodically writes the data as defined records to the z/VM monitor stream using the monwriter character device driver.

You can start the daemon with a service script /etc/init.d/mon_statd or call it manually. When it is called with the service utility, it reads the configuration file /etc/sysconfig/mon_statd.

Before you begin:
  • Install the monwriter device driver and set up z/VM to start the collection of monitor sample data.
  • Customize the configuration file /etc/sysconfig/mon_statd if you plan to call it with the service utility.

The following publications provide general information about DCSSs, DIAG x'DC', CP commands, and APPLDATA:

  • See z/VM: Saved Segments Planning and Administration, SC24-6322 for general information about DCSSs.
  • See z/VM: CP Programming Services, SC24-6272 for information about the DIAG x'DC' instruction.
  • See z/VM: CP Commands and Utilities Reference, SC24-6268 for information about the CP commands.
  • See z/VM: Performance, SC24-6301 for information about monitor APPLDATA.
You can run the mon_fsstatd command in two ways:
  • Calling mon_statd with the service utility. This method reads the configuration file /etc/sysconfig/mon_statd. The mon_statd service script also controls other daemons, such as mon_procd.
  • Calling mon_fsstatd from a command line.