Configuring checkpoint and journal data streams - Revision history

RPuszewski: /* Using the GDG option */

2025-01-21T20:48:43Z

Using the GDG option

← Older revision		Revision as of 20:48, 21 January 2025
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	Do <b>not</b> allocate GDGs with the SCRATCH option.</p>		Do <b>not</b> allocate GDGs with the SCRATCH option.</p>
	<p>		<p>
	Effective with V8.0~~, if SCRATCH or LIMIT is specified for~~ journal, jlog, or checkpoint(s) datasets, that ~~limit will be verified~~.		Effective with V8.0 journal, jlog, or checkpoint(s) datasets, if LIMIT is set with either SCRATCH or EMPTY, Model204 will verify that LIMIT.
	If Model204 is within two or less of the specified limit, M204.3029 (GDG member %C is within 00000002 of limit) will be sent to the operator.		If Model204 is within two or less of the specified limit, M204.3029 (GDG member %C is within 00000002 of limit) will be sent to the operator. If Model204 attempts to allocate a member that is beyond the limit, M204.3030 (GDG member %C disabled: Exceeded GDG limit of %X) will be sent to the operator. If no other datasets are available (ie. non-parallel), Model204 will be properly shutdown in order to allow recovery to be possible without the loss of data.
	If Model204 attempts to allocate a member that is beyond the limit, M204.3030 (GDG member %C disabled: Exceeded GDG limit of %X) will be sent to the operator. If no other datasets are available (ie. non-parallel), Model204 will be properly shutdown in order to allow recovery to be possible without the loss of data.		Note: No limit check will be done if NOSCRATCH and NOEMPTY are specified since all datasets will remain catalogued.
	</blockquote>		</blockquote>

RPuszewski: /* Using the GDG option */

2025-01-21T20:39:28Z

Using the GDG option

← Older revision		Revision as of 20:39, 21 January 2025
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	<p>		<p>
	Do <b>not</b> allocate GDGs with the SCRATCH option.</p>		Do <b>not</b> allocate GDGs with the SCRATCH option.</p>
			<p>
			Effective with V8.0, if SCRATCH or LIMIT is specified for journal, jlog, or checkpoint(s) datasets, that limit will be verified.
			If Model204 is within two or less of the specified limit, M204.3029 (GDG member %C is within 00000002 of limit) will be sent to the operator.
			If Model204 attempts to allocate a member that is beyond the limit, M204.3030 (GDG member %C disabled: Exceeded GDG limit of %X) will be sent to the operator. If no other datasets are available (ie. non-parallel), Model204 will be properly shutdown in order to allow recovery to be possible without the loss of data.
	</blockquote>		</blockquote>

	<p class="note"><b>Note:</b> The control stream is a very small data set and no DCB attributes are required for its allocation. Also, do not use GDGs as members of ring or concatenated stream for the CHKPNTS data set since the close process may lose the ability to determine which GDG generation is being filled.</p>		<p class="note"><b>Note:</b> The control stream is a very small data set and no DCB attributes are required for its allocation. Also, do not use GDGs as members of ring or concatenated stream for the CHKPNTS data set since the close process may lose the ability to determine which GDG generation is being filled.</p>

	===Data Set Control Blocks (DSCBs) and GDGs===		===Data Set Control Blocks (DSCBs) and GDGs===
	<p>		<p>

JDamon: This section was not clear and erroneously stated that the DDNAME for the recovery input stream was CHKPOINT; it is RESTART.

2016-03-29T23:58:45Z

This section was not clear and erroneously stated that the DDNAME for the recovery input stream was CHKPOINT; it is RESTART.

JALWiccan: Automatically generated page update

2014-11-06T17:08:06Z

Automatically generated page update

← Older revision		Revision as of 17:08, 6 November 2014
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	The single data sets can then be used in your recovery job. If you need to use specific generations for media recovery, special considerations apply when using GDG streams. </p>		The single data sets can then be used in your recovery job. If you need to use specific generations for media recovery, special considerations apply when using GDG streams. </p>

	[[Category:System ~~Manager~~]]		[[Category:System management]]
	[[Category:Recovery]]		[[Category:Recovery]]

JAL at 21:10, 29 October 2014

2014-10-29T21:10:50Z

← Older revision		Revision as of 21:10, 29 October 2014
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	[[Category:System Manager]]		[[Category:System Manager]]
			[[Category:Recovery]]

JAL: adjust graphic spacing

2014-10-29T20:13:42Z

adjust graphic spacing

← Older revision		Revision as of 20:13, 29 October 2014
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	The following figure illustrates the concept of a ring output stream with parallel stream members:</p>		The following figure illustrates the concept of a ring output stream with parallel stream members:</p>

	<p class="caption" style="~~margin-right~~:~~35em~~">Ring output stream with parallel stream members</p>		<p class="caption" style="width:362px">Ring output stream with parallel stream members</p>
	:[[File:17ringStrm75.png]]		<p class="figure">[[File:17ringStrm75.png\|362px]] </p>

	===DEFINE STREAM example===		===DEFINE STREAM example===
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	Conceptually, the checkpoint stream is as shown in the following figure:</p>		Conceptually, the checkpoint stream is as shown in the following figure:</p>

	<p class="caption" style="~~margin-right~~:~~35em~~">Checkpoint stream</p>		<p class="caption" style="width:353px">Checkpoint stream</p>
	:[[File:17checkStream75.png]]		<p class="figure">[[File:17checkStream75.png\|353px]] </p>


	===DEFINE STREAM command for parallel checkpoint stream===		===DEFINE STREAM command for parallel checkpoint stream===
	<p>		<p>
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	<p>		<p>
	Conceptually, the stream configuration is shown in the following figure:</p>		Conceptually, the stream configuration is shown in the following figure:</p>
	<br/>
	:[[File:Ch17-3 streamCfg.gif]]		<p class="caption" style="width:379px">Stream configuration</p>
	~~<p class="caption" style="margin-right:35em">Stream configuration~~</p>		<p class="figure">[[File:Ch17-3 streamCfg.gif\|379px]] </p>

	===DEFINE STREAM commands===		===DEFINE STREAM commands===

JAL: /* Example 3: Concatenated tape off load stream for z/OS */

2014-10-23T22:47:35Z

Example 3: Concatenated tape off load stream for z/OS

← Older revision		Revision as of 22:47, 23 October 2014
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	<p>		<p>
	Conceptually, the stream configuration is shown in the following figure:</p>		Conceptually, the stream configuration is shown in the following figure:</p>
			<br/>
	<p class="caption" style="margin-right:~~30em~~">Stream configuration~~</p>~~		:[[File:Ch17-3 streamCfg.gif]]
	~~<p>~~		<p class="caption" style="margin-right:35em">Stream configuration</p>
	~~[[File:Ch17-3 streamCfg.gif]]~~
	</p>

	===DEFINE STREAM commands===		===DEFINE STREAM commands===

JAL: /* Example 2: Parallel checkpoint stream */

2014-10-23T22:34:42Z

Example 2: Parallel checkpoint stream

← Older revision		Revision as of 22:34, 23 October 2014
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	Conceptually, the checkpoint stream is as shown in the following figure:</p>		Conceptually, the checkpoint stream is as shown in the following figure:</p>

	<p class="caption" style="margin-right:~~30em~~">Checkpoint stream</p>		<p class="caption" style="margin-right:35em">Checkpoint stream</p>
	~~<p>~~		:[[File:17checkStream75.png]]
	[[File:17checkStream75.png]]
	~~</p>~~

	===DEFINE STREAM command for parallel checkpoint stream===		===DEFINE STREAM command for parallel checkpoint stream===

JAL: link repair

2014-10-21T21:52:31Z

link repair

← Older revision		Revision as of 21:52, 21 October 2014
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	<li>Allocates storage for control blocks and buffers for all the member streams:		<li>Allocates storage for control blocks and buffers for all the member streams:
	<ul>		<ul>
	<li>Parallel stream open is successful, if the parallel stream control block can be allocated and the number of members successfully opened is equal to or greater than the user-specified minimum (<var>[[~~MINAVAIL parameter~~\|MINAVAIL]]</var> parameter).</li>		<li>Parallel stream open is successful, if the parallel stream control block can be allocated and the number of members successfully opened is equal to or greater than the user-specified minimum (<var>[[DEFINE STREAM command\|MINAVAIL]]</var> parameter).</li>

	<li>Parallel stream open fails, if the stream control block cannot be allocated, or if the user-specified minimum number of members fails to open. Error messages are displayed in the audit trail and at the user's terminal.</li>		<li>Parallel stream open fails, if the stream control block cannot be allocated, or if the user-specified minimum number of members fails to open. Error messages are displayed in the audit trail and at the user's terminal.</li>

JAL: /* Example 1: Ring/parallel journal stream */

2014-10-17T21:44:16Z

Example 1: Ring/parallel journal stream

← Older revision		Revision as of 21:44, 17 October 2014
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	The following figure illustrates the concept of a ring output stream with parallel stream members:</p>		The following figure illustrates the concept of a ring output stream with parallel stream members:</p>

	<p class="caption" style="margin-right:~~30em~~">Ring output stream with parallel stream members</p>		<p class="caption" style="margin-right:35em">Ring output stream with parallel stream members</p>
	~~<p>~~		:[[File:17ringStrm75.png]]
	[[File:17ringStrm75.png]]
	~~</p>~~

	===DEFINE STREAM example===		===DEFINE STREAM example===

← Older revision		Revision as of 23:58, 29 March 2016
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	If your site uses pattern DSCBs, you might want to insert the SMSLIKE=your.site.gdg option in your DEFINE DATASET command, instead of using the <code>UNIT=<i>unit</i></code> and <code>VOLSER=<i>volume</i></code> options, as shown in the following example.</p>		If your site uses pattern DSCBs, you might want to insert the SMSLIKE=your.site.gdg option in your DEFINE DATASET command, instead of using the <code>UNIT=<i>unit</i></code> and <code>VOLSER=<i>volume</i></code> options, as shown in the following example.</p>
	<p>		<p>
	Set up the output stream using the following ~~code~~ as a guide:</p>		Set up the output stream (for the online step), using the following DEFINE commands, as a guide (CTLJ and CTLC could be standard JCL DD statements or could be defined with additional DEFINE DATASET commands):</p>
	<p class="code">DEFINE STREAM CCAJRNL WITH SCOPE=SYSTEM GDG=J1 CONTROL=CTLJ		<p class="code">DEFINE STREAM CCAJRNL WITH SCOPE=SYSTEM GDG=J1 CONTROL=CTLJ
	DEFINE STREAM CHKPOINT WITH SCOPE=SYSTEM GDG=C1 CONTROL=CTLC		DEFINE STREAM CHKPOINT WITH SCOPE=SYSTEM GDG=C1 CONTROL=CTLC
	DEFINE DATASET J1 WITH SCOPE=SYSTEM SMSLIKE=pattern.GDG -		DEFINE DATASET J1 WITH SCOPE=SYSTEM SMSLIKE=pattern.GDG -
	DSNAME=your.site.GDG GEN=+1 CATALOG TRACK PRIMARY=100 -		DSNAME=your.site.GDG GEN=+1 CATALOG TRACK PRIMARY=100 -
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	</p>		</p>
	<p>		<p>
	Set up the input stream using the following ~~code~~ as a guide:</p>		Set up the input stream (for the recovery step), using the following DEFINE commands, as a guide:</p>
	<p class="code">DEFINE STREAM CCARF WITH SCOPE=SYSTEM GDG=J1 CONTROL=CTLJ		<p class="code">DEFINE STREAM CCARF WITH SCOPE=SYSTEM GDG=J1 CONTROL=CTLJ
	DEFINE STREAM ~~CHKPOINT~~ WITH SCOPE=SYSTEM GDG=C1 CONTROL=CTLC		DEFINE STREAM RESTART WITH SCOPE=SYSTEM GDG=C1 CONTROL=CTLC
	DEFINE DATASET J1 WITH SCOPE=SYSTEM OLD		DEFINE DATASET J1 WITH SCOPE=SYSTEM OLD
	DEFINE DATASET C1 WITH SCOPE=SYSTEM OLD		DEFINE DATASET C1 WITH SCOPE=SYSTEM OLD
	</p>		</p>

	==Example 1: Ring/parallel journal stream==		==Example 1: Ring/parallel journal stream==
	<p>		<p>