MRIODHPP

MRIODHPP Prolog

 DSECT NAME - IODHPP
 FUNCTION - This record indicates the alias use statistics of a
            HyperPAV pool
 LOCATED BY -
           Through the Monitor Control Area
 REFERENCED CONTROL BLOCKS -
        MRRECHDR    Monitor Record Header
 NAME - MRIODHPP
 DESCRIPTIVE NAME - Monitor Sample Record
                    Domain 6 - I/O Domain
                    Record 28 - HyperPAV Pool activity
 DESCRIPTION - Indicates the alias use statistics of a HyperPAV pool
 NOTES:
     The HyperPAV Pool Token is the Subsystem ID (SSID) of the
     logical control unit that all of the devices in the pool are
     associated.  The SSID is a unique value that distinguishes
     it from all other control units in a configuration.
     This value can be obtained from a Q DASD DETAILS command
     executed against one of the device's on the control unit.
     The HyperPAV Pool number is a value that indicates which
     devices (bases/aliases) can be used together in a HyperPAV
     environment.  This value is generated by CP using the SSID
     to ensure that it is unique value in the system.  This value
     can be obtained from a Q PAV command executed against one
     of the devices in the pool.

MRIODHPP Control Block Contents

Offsets
Dec  Hex  Type        Len  Name (Dim)             Description
 
   0   0  Structure    48  IODHPP                 Start of monitor record
   0   0  Character     0  IODHPP_MRHDR           Record header. See MRRECHDR
                                                  for details.
   0   0  Character    20  MRHDR                  
   0   0  Unsigned      2  MRHDRLEN               record length in bytes
   2   2  Unsigned      2  MRHDRZER               field of zeros
   4   4  Unsigned      1  MRHDRDM                domain identifier
   5   5  Unsigned      1  *                      
   6   6  Unsigned      2  MRHDRRC                record identifier
   8   8  Character     8  MRHDRTOD               Time at which this record
                                                  was built. In time-of-day
                                                  (TOD) clock format. See IBM
                                                  System 370 XA Principle of
                                                  Operation for explanation of
                                                  format.
  16  10  Character     4  *                      
  20  14  Character     0  MRHDR_END              End of header
  20  14  Unsigned      2  IODHPP_HPPOOLNM        HyperPAV Pool Number
  22  16  Unsigned      2  IODHPP_HPPTOKEN        HyperPAV Pool Token = SSID
  24  18  Unsigned      4  IODHPP_HPPNBASE        Number of base devices in
                                                  the HyperPAV pool.
  28  1C  Unsigned      4  IODHPP_HPPNALIS        Number of alias devices in
                                                  the HyperPAV pool.
  32  20  Unsigned      4  IODHPP_HPPTRIES        Number of times CP went to
                                                  the HyperPAV pool's free
                                                  queue to find an alias device
  36  24  Unsigned      4  IODHPP_HPPFAILS        Number of times CP went to
                                                  the HyperPAV pool's free
                                                  queue to find an alias device
                                                  but couldn't find one to use
  40  28  Unsigned      4  IODHPP_HPPMINCT        Lowest number of alias
                                                  devices in the HyperPAV
                                                  pool's free queue since the
                                                  last MRIODHPP record was cut.
                                                  Note: A value of X'7FFFFFFF'
                                                  means CP has not tried to get
                                                  an alias from this pool since
                                                  the last MRIODHPP record was
                                                  cut.
  44  2C  Unsigned      4  IODHPP_HPPMAXCT        Highest number of alias
                                                  devices in the HyperPAV
                                                  pool's free queue since the
                                                  last MRIODHPP record was cut.
                                                  Note: a value of X'FFFFFFFF'
                                                  means CP has not tried to get
                                                  an alias from this pool since
                                                  the last MRIODHPP record was
                                                  cut.
  48  30  Character     0  IODHPP_END             

MRIODHPP Cross Reference

                      Hex           Hex
Name                 Offset Length Value
 
IODHPP                     0     48
IODHPP_END                30      0
IODHPP_HPPFAILS           24      4
IODHPP_HPPMAXCT           2C      4
IODHPP_HPPMINCT           28      4
IODHPP_HPPNALIS           1C      4
IODHPP_HPPNBASE           18      4
IODHPP_HPPOOLNM           14      2
IODHPP_HPPTOKEN           16      2
IODHPP_HPPTRIES           20      4
IODHPP_MRHDR               0      0
MRHDR                      0     20
MRHDR_END                 14      0
MRHDRDM                    4      1
MRHDRLEN                   0      2
MRHDRRC                    6      2
MRHDRTOD                   8      8
MRHDRZER                   2      2

This information is
based on z/VM V6R3.0.

Last updated on 22 Jul 2013 at 15:07:38.

Copyright IBM Corporation, 1990, 2013