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Programming Interface Information:
The Monitor Records are intended Programming Interfaces that allow the customer to write programs to obtain services of z/VM. |
MRIODHPP
PrologControl Block Contents
Cross Reference
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 V5R4.0.
Last updated on 5 Sep 2008 at 09:11:41.
Copyright IBM Corporation, 1990, 2008