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z/VM Module 5: Advanced Structures and Commands. Control Program. Objectives. List and describe additional CP commands, including: Privilege classes Command descriptions Syntax diagrams Usage notes List and describe useful CP utilities, including: Descriptions Functions Usage notes.

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objectives
Objectives
  • List and describe additional CP commands, including:
      • Privilege classes
      • Command descriptions
      • Syntax diagrams
      • Usage notes
  • List and describe useful CP utilities, including:
      • Descriptions
      • Functions
      • Usage notes
detach
DETACH
  • Use the DETACH commands to detach the following:
      • Virtual processors from your virtual machine
      • Real devices from the host system
      • Logical devices from the host system
      • Real devices from your virtual machine
      • Logical devices from your virtual machine
      • Virtual devices from your virtual machine
      • A Virtual Vector Facility from your virtual machine
      • And more
detach usage notes
DETACH Usage Notes
    • These are some of the CP DETACH commands:
      • DETACH CFLINK
      • DETACH CPU
      • DETACH CRYPTO
      • DETACH LAN
      • DETACH NIC
      • DETACH MSGPROC
      • DETACH (Real Device)
      • DETACH VECTOR
      • DETACH (Virtual Device)
      • DETACH XSTORE
  • You can find more information in the CP Command and Utilities Reference and in z/VM’s help facility:
terminal usage notes
TERMINAL Usage Notes
  • You can specify more than one function in a single entry of the terminal command
  • For CHARDEL, LINEND, TABCAR, and ESCAPE you cannot use any letter A through Z, the numbers 0 through 9, or the bytes X’0E’ or X’0F’ as a symbol
  • The system operator can specify system defaults for the TERMINAL LINEND, CHARDEL, TABCHAR, and ESCAPE characters
  • The characters displayed depend on the code page used by the terminal emulator
slide8
SET
  • The SET command is used interchangeably within CP and CMS to control commands
  • It controls such functions as:
indicate user usage notes
INDICATE USER Usage Notes
  • Use this command to display the total amount of resources used by your virtual machine during your current session.
  • Use it before and after the execution of a program to determine the execution characteristics of that program.
  • If the expanded response is given for a user who is logging on or off and does not have a base address space, then the primary space name and space type will be filled with “*” in the response.
how the directory program works
How the Directory Program Works
  • If a file name or type is not specified, then the file name is USER with a file type of DIRECT (defaults)
  • If any type of error occurs the program does not create the directory
  • This utility looks up and uses the RPWLIST DATA file, which contains a list of restricted passwords
  • If DIRECTXA runs out of DASD space, the utility issues an error message, and the directory is not processed
  • If the program is updating an active system directory, the program makes the new directory immediately available for the system
directxa utility usage notes
DIRECTXA Utility Usage Notes
  • To update the system user directory, you must be of privilege class A, B, or C.
  • If another user directory exists, the DIRECTXA utility does not overwrite the current directory, but does write an alternate user directory.
  • If the directory specified on the DIRECTXA utility is not the current directory, the directory that is created by this utility is not brought online.
  • The MIXED option should be used during migration from other releases.
directxa utility examples
DIRECTXA Utility Examples
  • Listed below are different examples of altering or creating the user directory:
    • Directxa user direct *
    • Directxa user direct * (edit mixed
    • Directxa user direct *(edit mixed mixmsg sysafnid sysyma
    • Directxa user direct * (edit sysafnid sysyma
    • Directxa user direct * (mixed nomixmsg
diskmap utility usage notes
DISKMAP Utility Usage Notes
  • Some DASD types come in several sizes, so the end gap is not listed.
  • DISKMAP creates the map on your A-disk, so you may need to clear space if your A-disk might fill up.
  • You may want to lay out your MDISK design first to distinguish between overlap errors or plan overlaps.
  • If you want end statements to display the end of each MDISK you must issue the DOENDS operand.
changing the allocation map
Changing the Allocation Map
  • An allocation map of the disk is displayed to verify that it is the correct disk and that you are sure changes are needed.
  • Within your allocation map you can define a directory, page space, spool space, temporary disk space, etc.
  • You must always define the cylinder range and total number of cylinders that are to be allocated for each defined space
interactions with ickdsf
Interactions with ICKDSF
  • The example in the notes shows the prompts that are issued if ICKDSF is available and you enter CPFMTXA only.
  • If you entered:
    • cpfmtxa y
  • you will be prompted to format, allocate, or label the DASD you specify.
  • If you format the entire DASD you may have to wait several minutes for it to complete formatting.
interactions with ickdsf continued
Interactions with ICKDSF continued
  • This continuation demonstrates what happens when you specify space for spooling, temporary disk, perm (static space), and page (paging space).
  • Below is an example of what you could allocate and the different ways you can represent it:
        • TYPE CYLINDERS
        • ..................
        • perm 0.3
        • spol 3.300
        • tdsk 303 450
        • page 451-500
        • perm 501-end
        • end
cpfmtxa utility usage notes
CPFMTXA Utility Usage Notes
  • If ICKDSF is not on an accessed disk no formatting, allocating, or labeling will occur.
  • Before using the ALLOCATE option you must format the volume.
  • CPFMTXA will prompt you many times during a format operation to confirm that you want to continue, since formatting the disk will erase all data on the disk
  • There are three different ways to specify the cylinders to be formatted:
        • cpfmtxa 192 test1
        • cpfmtxa 192 test2 0.3
        • cpfmtxa 192 test3 0-3
cpfmtxa utility usage notes continued
CPFMTXA Utility Usage Notes continued
  • DRCT, PAGE, PARM, PERM, SPOL, and TDISK are allocation types.
  • If the allocation record is overwritten, it is effectively destroying any pointer to the active directory and rending it inaccessible.
  • Space for system dumps and system data files needs to be allocated as SPOL space.
  • ICKDSF reserves pages 0-3 for system use.
conclusion
Conclusion
  • CP commands you should understand and be able to use:
        • DETACH
        • TERMINAL
        • SET
        • INDICATE USER
  • CP utilities that you should understand and be able to use:
        • DIRECTXA
        • DISKMAP
        • CPFMTXA
  • The first five modules cover the fundamentals of the z/VM environment
glossary
Glossary
  • CPFMTXA – can be used to ESA format, label, and allocate DASD volumes for CP uses such as paging, spooling, temporary disk, directory, nucleus, and minidisk space.
  • DETACH –detaches attached devices owned by the current user.
  • DIRECTXA – creates a user directory.
  • DISKMAP – summarizes the minidisk statements in the user directory.
glossary1
Glossary
  • INDICATE USER – displays the resources used and occupied by a virtual machine or by the system.
  • SET –describes the various functions associated with your virtual machine or with the z/VM system.
  • TERMINAL –controls various characteristics of your virtual console.