CACHE parameter - Revision history

DmeWiccan: Automatically generated page update

2013-08-27T16:25:22Z

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DmeWiccan: Automatically generated page update

2013-04-23T01:50:46Z

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Dme: Undo revision 56819 by DmeWiccan (talk)

2013-04-19T15:34:03Z

Undo revision 56819 by DmeWiccan (talk)

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DmeWiccan: Automatically generated page update

2013-04-19T14:38:22Z

Automatically generated page update

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Alex: Automatically generated page update

2013-02-28T00:55:18Z

Automatically generated page update

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==Summary==
<dl>
<dt>Default value
<dd>X'00'
<dt>Parameter type
<dd>System
<dt>Where set
<dd>On User 0's parameter line at initialization; it cannot be reset during the run
<dt>Related products
<dd>All
<dt>Introduced
<dd><var class="product">Model 204 V6.1</var> or earlier
</dl>
==Description==
Allows data to be written directly to a controller's cache
You can use the cache fast write feature for the CCATEMP and CCASERV data sets. It is available for cached DASD controllers like the IBM models 3 and 6.
A write is considered successful as soon as it is accepted by the cache. If the cache capacity is exceeded, parts of the data are downloaded to disk. Upon cache or DASD failure, the disk image is not guaranteed.
The valid settings of CACHE are: 
<table>
<tr><th>Setting</th><th>
Meaning
</th></tr>
<tr><th align="right"><var>X'00'</var></th><td>
Do not use cache fast write (default)
</td></tr>
<tr><th align="right"><var>X'01'</var></th><td>
Use cache fast write for CCASERV access 
</td></tr>
<tr><th align="right"><var>X'02'</var></th><td>
Use cache fast write for CCATEMP access
</td></tr>
<tr><th align="right"><var>X'03'</var></th><td>
Use cache fast write for CCATEMP and CCASERV access
</td></tr>
</table>
[[Category:System Parameters]]
[[Category:Parameters]]