263 lines
23 KiB
XML
263 lines
23 KiB
XML
<?xml:stylesheet version="1.0" encoding="utf-8"?>
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<?xml:stylesheet type="text/xsl" href="../rzahg/icdyntable.xsl"?>
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<TABLE xmlns="x-schema:rzahxqapmdisk-schema.xml">
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<TITLE>Performance data files: QAPMDISK</TITLE>
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<TH col="TD1">
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Field Name
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</TH>
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<TH col="TD2">
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Description
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</TH>
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<TH col="TD3">
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Attribute
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</TH>
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<TR><TD1 valign="top">INTNUM</TD1><TD2 valign="top">Interval number: The <em>n</em>th sample database interval based on the
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start time specified in the Create Performance Data (CRTPFRDTA) command.</TD2><TD3 valign="top">PD (5,0)</TD3></TR>
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<TR><TD1 valign="top">DTETIM</TD1><TD2 valign="top">Interval date (<var class="varname">yymmdd</var>) and time (<var class="varname">hhmmss</var>):
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The date and time of the sample interval.</TD2><TD3 valign="top">C (12)</TD3></TR>
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<TR><TD1 valign="top">INTSEC</TD1><TD2 valign="top">Elapsed interval seconds: The number of seconds since the last sample
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interval.</TD2><TD3 valign="top">PD (7,0)</TD3></TR>
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<TR><TD1 valign="top">IOPRN</TD1><TD2 valign="top">IOP resource name</TD2><TD3 valign="top">C (10)</TD3></TR>
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<TR><TD1 valign="top">DIOPID</TD1><TD2 valign="top">Reserved</TD2><TD3 valign="top">C (1)</TD3></TR>
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<TR><TD1 valign="top">DSARM</TD1><TD2 valign="top">Disk arm number: Specifies the unique identifier of the unit. Each
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actuator arm on the disk drives available to the machine represents a unit
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of auxiliary storage. The value of the unit number is assigned by the system
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when the unit is allocated to an ASP.</TD2><TD3 valign="top">C (4)</TD3></TR>
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<TR><TD1 valign="top">DSTYPE</TD1><TD2 valign="top">Disk drive type such as 9332, 9335, or 6100.</TD2><TD3 valign="top">C (4)</TD3></TR>
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<TR><TD1 valign="top">DSDRN</TD1><TD2 valign="top">Device resource name. Typically, there is one disk (device) resource
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per disk unit except for a multipath disk unit that has multiple disk resources
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associated with it (see note <A HREF="#rzahxqapmdisk__qapmdisknote5" shape="rect">5</A>).</TD2><TD3 valign="top">C (10)</TD3></TR>
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<TR><TD1 valign="top">DSSCAN</TD1><TD2 valign="top">Number of search string commands: This count is always zero, because
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search string commands are not supported for the 9332, 9335, or 6100.</TD2><TD3 valign="top">PD (5,0)</TD3></TR>
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<TR><TD1 valign="top">DSBLKR </TD1><TD2 valign="top"><span>Number of blocks read: Block is one sector
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on the disk drive.</span></TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSBLKW </TD1><TD2 valign="top"><span>Number of blocks written: Block is one
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sector on the disk drive.</span> </TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSBLKR</TD1><TD2 valign="top">Number of blocks read: The block length is 520 bytes, which includes
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8 bytes of system control information.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSBLKW</TD1><TD2 valign="top">Number of blocks written: The block length is 520 bytes, which includes
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8 bytes of system control information.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSIDLC</TD1><TD2 valign="top">Processor idle loop counter (see note <A HREF="#rzahxqapmdisk__qapmdisknote1" shape="rect">1</A>):
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The number of times the disk controller passed through the idle loop. This
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count is increased differently for the 9332 and the 9335. For the 9332, this
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counter is increased only if the disk controller is totally idle (for example,
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no I/O operations are active.) For the 9335, even though the disk controller
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may be idle and the counter gets increased, an I/O operation can be active
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(for example, seek is being performed.) This field is nonzero for drive types
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that support a dedicated disk processor and zero for other drive types. <p>DSIDLC
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and DSIDLT are duplicated across all arms for the same disk controller.</p>
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</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSIDLT</TD1><TD2 valign="top">Processor idle loop time (see note <A HREF="#rzahxqapmdisk__qapmdisknote3" shape="rect">3</A>):
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The time (in hundredths of microseconds) to make one pass through the idle
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loop. This field is nonzero for drive types that support a dedicated disk
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processor and zero for other drive types. The value reported could be a multiple
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of the actual idle loop time. In that case, the value reported for the processor
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idle loop count field (DSIDLC) is reduced accordingly so that the calculated
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processor utilization is correct. <p>DSIDLC and DSIDLT are duplicated across
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all arms for the same disk controller.</p>
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</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSSK1</TD1><TD2 valign="top">Number of seeks > 2/3: The number of times the arm traveled more
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than 2/3 of the disk on a seek.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSSK2</TD1><TD2 valign="top">Number of seeks > 1/3 and < 2/3 (see note <A HREF="#rzahxqapmdisk__qampmdisknote2" shape="rect">2</A>):
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The number of times the arm traveled more than 1/3 but less than 2/3 of the
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disk on a seek.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSSK3</TD1><TD2 valign="top">Number of seeks > 1/6 and < 1/3 (see note <A HREF="#rzahxqapmdisk__qampmdisknote2" shape="rect">2</A>):
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The number of times the arm traveled more than 1/6 but less than 1/3 of the
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disk on a seek.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSSK4</TD1><TD2 valign="top">Number of seeks > 1/12 and < 1/6 (see note <A HREF="#rzahxqapmdisk__qampmdisknote2" shape="rect">2</A>):
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The number of times the arm traveled more than 1/12 but less than 1/6 of the
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disk on a seek.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSSK5</TD1><TD2 valign="top">Number of seeks < 1/12 (see note <A HREF="#rzahxqapmdisk__qampmdisknote2" shape="rect">2</A>):
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The number of times the arm traveled from its current position but less than
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1/12 of the disk on a seek.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSSK6</TD1><TD2 valign="top">Number of zero seeks (see note <A HREF="#rzahxqapmdisk__qampmdisknote2" shape="rect">2</A>):
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The number of times the access arm did not physically move on a seek request.
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The operation may have resulted in a head switch. This field is 0 for disk
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drive type 6100. The number of zero seeks will be accumulated in DSSK5.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSQUEL</TD1><TD2 valign="top">Total queue elements: The number of I/O operations waiting service
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at sample time. This number includes the I/O operation that is in progress.
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Divide this by DSSMPL to get the average queue length.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSNBSY</TD1><TD2 valign="top">Number of times arm not busy: The number of times there were no outstanding
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I/O operations active at sample time.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSSMPL </TD1><TD2 valign="top"><span>Number of samples taken: The number of
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samples taken for the DSQUEL and DSNBSY fields.</span> </TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSCAP</TD1><TD2 valign="top">Drive capacity (in bytes): Total number of bytes of auxiliary storage
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provided on the unit for the storage of objects and internal machine functions
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when the ASP containing it is not under checksum protection. The unit reserved
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system space value is subtracted from the unit capacity to calculate this
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capacity.</TD2><TD3 valign="top">PD (15,0)</TD3></TR>
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<TR><TD1 valign="top">DSAVL</TD1><TD2 valign="top">Drive available space (in bytes): Total number of bytes of auxiliary
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storage space that is not currently assigned to objects or internal machine
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functions, and therefore is available on the unit.</TD2><TD3 valign="top">PD (15,0)</TD3></TR>
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<TR><TD1 valign="top">DSASP</TD1><TD2 valign="top">ASP number: Specifies the ASP to which this unit is currently allocated.
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A value of 1 specifies the system ASP. A value from 2 through 32 specifies
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a basic ASP. A value from 33 to 255 specifies an independent ASP. A value
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of 0 indicates that this unit is currently not allocated.</TD2><TD3 valign="top">PD (5,0)</TD3></TR>
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<TR><TD1 valign="top">DSCSS</TD1><TD2 valign="top">Reserved</TD2><TD3 valign="top">C (2)</TD3></TR>
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<TR><TD1 valign="top">DSPCAP</TD1><TD2 valign="top">Reserved</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSPAVL</TD1><TD2 valign="top">Reserved</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DMFLAG</TD1><TD2 valign="top">' ' means this arm is not locally mirrored. 'A' means this is the designated
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first arm of a locally mirrored pair. 'B' means this is the designated second
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arm of a locally mirrored pair.</TD2><TD3 valign="top">C (1)</TD3></TR>
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<TR><TD1 valign="top">DMSTS</TD1><TD2 valign="top">Local mirroring status. 1 = active, 2 = resuming, 3 = suspended</TD2><TD3 valign="top">PD (1,0)</TD3></TR>
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<TR><TD1 valign="top">DMIRN</TD1><TD2 valign="top">Locally mirrored IOP resource name</TD2><TD3 valign="top">C (10)</TD3></TR>
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<TR><TD1 valign="top">DMDRN</TD1><TD2 valign="top">Locally mirrored device resource name</TD2><TD3 valign="top">C (10)</TD3></TR>
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<TR><TD1 valign="top">DSRDS</TD1><TD2 valign="top">Number of read data commands.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSWRTS</TD1><TD2 valign="top">Number of write data commands.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSBUFO</TD1><TD2 valign="top">Number of buffer overruns: The number of times that data was available
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to be read into the disk controller buffer from the disk, but the disk controller
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buffer still contained valid data that was not retrieved by the storage device
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controller. Consequently, the disk had to take an additional revolution until
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the buffer was available to accept data. This field is 0 for disk drive type
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6100.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSBUFU</TD1><TD2 valign="top">Number of buffer underruns: The number of times that the disk controller
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was ready to transfer data to the disk on a write, but the disk controller
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buffer was empty. The data was not transferred in time by the disk IOP to
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the disk controller buffer. The disk was forced to take an extra revolution
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awaiting the data. This field is 0 for disk drive type 6100.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSMDLN</TD1><TD2 valign="top">Model Number: The model number of the disk drive.</TD2><TD3 valign="top">C (4)</TD3></TR>
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<TR><TD1 valign="top">DSDCRH</TD1><TD2 valign="top">Device cache read hits: The number of times that all of the data requested
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by the read operation was obtained from the device read or write cache.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSDCPH</TD1><TD2 valign="top">Device cache partial read hits: The number of times that a portion,
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but not all, of the data requested by the read operation was obtained by the
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device read or write cache. A physical operation to the device media was required
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to obtain the remaining data.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSDCWH</TD1><TD2 valign="top">Device cache write hits: The number of times that the data associated
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with a write operation replaces, or is combined with, existing data in the
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device write cache, thereby eliminating a write operation.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSDCFW</TD1><TD2 valign="top">Device cache fast writers: The number of times that space was available
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in the device write cache for the data associated with a write operation and
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a response was returned immediately.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSDROP</TD1><TD2 valign="top">Device read operations: The number of read operations issued to the
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device by the controller. This includes operations generated for redundant
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system data areas. It does not include operations generated for diagnostics
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or access to the controller reserved area that occur during this idle time.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSDWOP</TD1><TD2 valign="top">Device write operations: The number of write operations issued to the
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device by the controller. This includes operations generated for redundant
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system data areas. It does not include operations generated for diagnostics
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or access to the controller reserved area that occur during this idle time.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSCCRH</TD1><TD2 valign="top">Controller cache read hits: The number of times that all of the data
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requested by the read operation was obtained from the controller read or write
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cache.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSPCPH</TD1><TD2 valign="top">Controller cache partial read hits: The number of times that a portion
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of the data requested by the read operation was obtained from the controller
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read and write cache. An operation to the device was required to obtain the
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remaining data.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSCCWH</TD1><TD2 valign="top">Controller cache writes hits: The number of times that the data associated
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with the write operation replaces or is combined with existing data in the
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controller write cache. This eliminates a write operation.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSCCFW</TD1><TD2 valign="top">Controller cache fast writes: The number of times that space was available
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in the controller write cache for the data associated with a write operation
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and a response was returned immediately.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSCOMP</TD1><TD2 valign="top">Compressed Unit indicator. '0' if disk data is not compressed and '1'
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if disk data is compressed.</TD2><TD3 valign="top">C (1)</TD3></TR>
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<TR><TD1 valign="top">DSPBU</TD1><TD2 valign="top">Physical blocks used. For compressed units, this field contains the
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total number of physical blocks used (written) in the device user data area.
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For non-compressed units, this field contains 0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSPBA</TD1><TD2 valign="top">Physical blocks allocated. For compressed units, this field contains
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the total number of physical blocks committed (reserved) in the device user
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data area for DASD extents. This value includes all of the Physical Blocks
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Used. For non-compressed units, this field contains 0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSLBW</TD1><TD2 valign="top">Logical blocks written. For compressed units, this field contains the
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total number of logical blocks written in the device user data area. This
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value represents the total amount of data written to allocated extents. For
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non-compressed units, this field contains 0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSLBA</TD1><TD2 valign="top">Logical blocks allocated. For compressed units, this field contains
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the total number of logical blocks contained in allocated compression groups.
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This value represents the total sum of all allocated compression groups in
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the device user data area. For non-compressed units, this field contains 0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSPBCO</TD1><TD2 valign="top">Physical blocks for compression overhead. For compressed units, this
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field contains the total number of physical blocks that are used for compression
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directory structures and reserved areas that are unavailable for storing user
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data. For non-compressed units, this field contains 0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSFGDR</TD1><TD2 valign="top">Foreground directory reads. For compressed units, this field is the
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number of device read operations that have been performed to read directory
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structures required to complete host system commands. For non-compressed units,
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this field contains 0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSFGDW</TD1><TD2 valign="top">Foreground directory writes. For compressed units this is the number
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of device write operations that have been performed to write directory structures
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required to complete host system commands. For non-compressed units, this
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field contains 0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSBGDR</TD1><TD2 valign="top">Background directory reads. For compressed units, this is the number
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of device read operations that have been performed in the management of compression
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directory structures, but were not immediately required to complete host system
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commands. For non-compressed units, this field contains 0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSBGDW</TD1><TD2 valign="top">Background directory writes. For compressed units, this is the number
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of device write operations. For non-compressed units, this field contains
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0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSFGRE</TD1><TD2 valign="top">Foreground read exceptions. For compressed units, this is the number
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of times an additional device read operation was issued to read data that
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had been stored in the exception area on a compressed device (this count applies
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only to multi-page operations). This count reflects only those operations
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immediately required to complete host system commands.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSFGWE</TD1><TD2 valign="top">Foreground write exceptions. For compressed units, this field is the
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number of times an additional device write operation was issued to write data
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into the exception area on a compressed device (this count applies only to
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multi-page operations). This count reflects only those operations immediately
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required to complete host system commands. For non-compressed units, this
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field contains 0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSFGS</TD1><TD2 valign="top">Foreground sweeps. For compressed units, a sweep is the process used
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to store a 1-MB compression group in the correct number of sectors so there
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are no unused areas in the data region and no used areas in the exception
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region of the compression group. The number of foreground sweeps is the number
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of times an entire 1-MB compression group was required to be swept to complete
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host system commands. The sweep is needed because the data for a host system
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write operation does not fit into the physical space reserved. The new data
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does not compress as well as the data that was previously in the space. For
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non-compressed units, this field contains 0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSBGS</TD1><TD2 valign="top">Background sweeps. For compressed units, a sweep is the process used
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to store a 1-MB compression group in the correct number of sectors so there
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are no unused areas in the data region and no used areas in the exception
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region of the compression group. The number of background sweeps is the number
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of times an entire 1-MB compression group was swept to maintain the compressed
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data storage efficiency. This count reflects only those sweeps that were not
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immediately required to complete host system commands. Background sweeps are
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intended to increase performance or increase usable capacity of drive. For
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non-compressed units, this field contains 0.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSCERC</TD1><TD2 valign="top">Controller simulated read cache hits: The number of times that all
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of the data requested by the read operation could have been, but was not,
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obtained from a controller read cache (not the controller write cache). This
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field is updated only when Extended Adaptive Cache Simulator is enabled.</TD2><TD3 valign="top">PD (11,0)</TD3></TR>
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<TR><TD1 valign="top">DSASPN</TD1><TD2 valign="top">ASP resource name. Specifies the resource name of the ASP to which
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this unit is currently allocated. A value of blanks specifies the system ASP
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or a basic ASP.</TD2><TD3 valign="top">C (10)</TD3></TR>
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<TR><TD1 valign="top">DSPS</TD1><TD2 valign="top">Parity set. <span>The valid value for this field is '1' or
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'0'.</span> The value of this field is '1' when the disk unit is in a parity
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set; otherwise, it is '0'.</TD2><TD3 valign="top">C (1)</TD3></TR>
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<TR><TD1 valign="top">DSHAPS</TD1><TD2 valign="top">High availability parity set. <span>The valid value for this
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field is '1' or '0'.</span> The value of this field is '1' when the disk unit
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is in a high availability parity set; otherwise, it is '0'.</TD2><TD3 valign="top">C (1)</TD3></TR>
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<TR><TD1 valign="top">DSMU</TD1><TD2 valign="top">Multipath unit. <span>The valid value for this field is '1'
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or '0'.</span> The value of this field is '1' when the disk resource represents
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a multipath disk unit (see note <A HREF="#rzahxqapmdisk__qapmdisknote5" shape="rect">5</A>);
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otherwise, it is '0'.</TD2><TD3 valign="top">C (1)</TD3></TR>
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<TR><TD1 valign="top">DSIP</TD1><TD2 valign="top">Initial path of multipath unit. <span>The valid value for
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this field is '1' or '0'.</span> The value of this field is '1' when the disk
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resource represents the initial path of a multipath disk unit; otherwise it
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is '0'. The initial path is the first path observed by the system. It can
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change after restarting the system (IPL). The resource name of the initial
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path can be used for reporting a multipath disk unit under a single resource
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name.</TD2><TD3 valign="top">C (1)</TD3></TR>
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<TR><TD1 valign="top">DSPC</TD1><TD2 valign="top">Production copy of remotely mirrored independent ASP. <span>The
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valid value for this field is '1' or '0'.</span> The value of this field is
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'1' when the disk unit is in a production copy of a remotely mirrored independent
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ASP; otherwise, it is '0'.</TD2><TD3 valign="top">C (1)</TD3></TR>
|
||
<TR><TD1 valign="top">DSMC</TD1><TD2 valign="top">Mirror copy of remotely mirrored independent ASP. <span>The
|
||
valid value for this field is '1' or '0'.</span> The value of this field is
|
||
'1' when the disk unit is in a mirror copy of a remotely mirrored independent
|
||
ASP; otherwise, it is '0'.</TD2><TD3 valign="top">C (1)</TD3></TR>
|
||
<TR><TD1 valign="top"><span>DSRDT</span> </TD1><TD2 valign="top"><span>RAID type: type of RAID parity set for
|
||
this disk unit. The valid value for this field is '1' or '0'. This field
|
||
only has meaning for disk units in a parity set (DSPS field set to '1').
|
||
'0' = RAID 5 parity set, '1' = RAID 6 parity set.</span></TD2><TD3 valign="top"><span>C (1) </span></TD3></TR>
|
||
<TR><TD1 valign="top"><span>DSIOPF</span> </TD1><TD2 valign="top"><span>Managed by IOP (See note <A HREF="#rzahxqapmdisk__qapmdisknote6" shape="rect">6</A>).
|
||
The valid value for this field is '1' or '0'. The value of this field is '1'
|
||
when this disk unit is attached to the disk storage adapter which is managed
|
||
by IOP; otherwise, it is '0'.</span></TD2><TD3 valign="top"><span>C (1) </span></TD3></TR>
|
||
<TR><TD1 valign="top"><span>DSCAT</span> </TD1><TD2 valign="top"><span>Disk unit category. This field indicates
|
||
if this disk unit has some special characteristics, which may require a special
|
||
interpretation of its performance data. This can also be determined by examining
|
||
device type and model for this disk unit. X’00’ = no special category applies,
|
||
X’01’ = this disk unit is located in external storage media.</span> </TD2><TD3 valign="top"><span>C (1) </span></TD3></TR>
|
||
</TABLE>
|