Z command: Difference between revisions
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<p>Use of SORT5 and TAPE5 may require user authorization by an external security interface. </p> | <p>Use of SORT5 and TAPE5 may require user authorization by an external security interface. </p> | ||
<p>When processing of the Z command is complete, <var class="product">Model 204</var> displays various statistics, including the number of index entries added and deleted, and the number of records written to the for-each-value data set.</p> | <p>When processing of the Z command is complete, <var class="product">Model 204</var> displays various statistics, including the number of index entries added and deleted, and the number of records written to the for-each-value data set.</p> | ||
<p>Use the Z command to rebuild the Ordered Index from deferred update records after issuing the | <p>Use the Z command to rebuild the Ordered Index from deferred update records after issuing the <var>[[REORGANIZE command|REORGANIZE]]</var> command.</p> | ||
<p>When it processes a Z command, <var class="product">Model 204</var> ends any update unit in progress and begins a non-backoutable update unit. For more information about <var class="product">Model 204</var> update units, see | <p>When it processes a Z command, <var class="product">Model 204</var> ends any update unit in progress and begins a non-backoutable update unit. For more information about <var class="product">Model 204</var> update units, see [[File integrity and recovery]].</p> | ||
<p>The Z command and the deferred update feature are described in detail in | <p>The Z command and the deferred update feature are described in detail in [[Deferred update feature]].</p> | ||
[[Category: File manager commands]] | [[Category: File manager commands]] | ||
[[Category:Commands]] | [[Category:Commands]] | ||
Latest revision as of 23:32, 14 April 2017
Summary
- Privileges
- File manager (as User 0 only)
- Function
- Applies deferred updates to a Model 204 file
Syntax
Z
Usage notes
The Z command applies deferred updates to a Model 204 file. Deferred updates are produced by opening a file in deferred update mode, and then updating the file using the FLOD command or the REORGANIZE command. The Z command performs the following operations:
-
Reads records from the data set pointed to by the SORT5 DD name, FILEDEF, or DLBL.
-
Updates Tables C and D of the currently open Model 204 file.
-
Writes for-each-value records to the data set pointed to by the TAPE5 data set.
Use of SORT5 and TAPE5 may require user authorization by an external security interface.
When processing of the Z command is complete, Model 204 displays various statistics, including the number of index entries added and deleted, and the number of records written to the for-each-value data set.
Use the Z command to rebuild the Ordered Index from deferred update records after issuing the REORGANIZE command.
When it processes a Z command, Model 204 ends any update unit in progress and begins a non-backoutable update unit. For more information about Model 204 update units, see File integrity and recovery.
The Z command and the deferred update feature are described in detail in Deferred update feature.