3dm2/help/en/Maintain_Units.7.26.html
2017-11-10 18:26:11 +01:00

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<a class="WebWorks_Breadcrumb_Link" href="Maintain_Units.7.1.html#1112466">Maintaining Units</a> &gt; Scheduling Background Tasks</div>
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<div class="Heading1"><a name="1112466">Scheduling Background Tasks</a></div>
<div class="Body"><a name="1092717">You can set up scheduling windows for when background tasks occur so that </a>routine maintenance of storage media occurs when it will be least likely to interfere with day-to-day work on the system (peak I/O times). By creating and using schedules, you can specify when active rebuilding, migrating, verifying, and testing of units should occur. For example, you might wish these tasks to occur at 2 AM each day, or on weekends.</div>
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<span class="Red"> </span><a name="1115332">&nbsp;</a></div>
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<div class="CellBody"><span class="NoteHeading"><a name="1115348">Note:</a></span> Initialization follows the rebuild/migrate schedule. The default setting for both is to ignore the schedule.</div>
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<div class="Body"><a name="1092719">Rebuild/migrate, verify, and self-test tasks are scheduled separately, but in a </a>very similar way. You can perform the following scheduling tasks:</div>
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<div class="Bullet_inner"><a href="Maintain_Units.7.27.html#1082252" name="1072451">Viewing Current Task Schedules</a></div>
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<div class="Bullet_inner"><a href="Maintain_Units.7.28.html#1116708" name="1072455">Turning On or Off Use of a Rebuild/Migrate Task Schedule</a></div>
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<div class="Bullet_inner"><a href="Maintain_Units.7.29.html#1515263" name="1515463">Selecting Advanced or Basic Verify Schedules</a></div>
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<div class="Bullet_inner"><a href="Maintain_Units.7.30.html#1515344" name="1072459">Removing a Task Slot from a Schedule</a></div>
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<div class="Bullet_inner"><a href="Maintain_Units.7.31.html#1072535" name="1072463">Adding a New Task Schedule Slot</a></div>
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<div class="Bullet_inner"><a href="Maintain_Units.7.32.html#1072552" name="1080372">Selecting Self-tests to be Performed</a></div>
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<div class="anchor-indented"><a name="1115406">&nbsp;</a></div>
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<div class="CellBody"><span class="UI-Element"><a name="1115492">Tip:</a></span> If you want to change a task schedule window, you first remove the schedule item and then add it back with the desired day, time, and duration.</div>
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<span class="Red"> </span><a name="1115484">&nbsp;</a></div>
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<div class="CellBody"><span class="NoteHeading"><a name="1139120">Note</a></span>: Setting up the scheduling window does not actually request background tasks. It simply specifies when they can run. For more information about the background tasks themselves, see <a href="Maintain_Units.7.15.html#1144914">Background Tasks</a>.</div>
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<div class="Body"><a name="1081558">You can also set the rate at which background tasks are performed compared </a>to I/O tasks. For more information, see <a href="Maintain_Units.7.24.html#1585765">Setting Background Task Rate</a>.</div>
<div class="Heading3"><a name="1080517">Scheduled Task Duration</a></div>
<div class="Body"><a name="1080524">If a rebuild does not complete in a scheduled time block, it will pause and </a>continue where it left off at the next scheduled time block.</div>
<div class="Body"><a name="1521794">This is also true for verify, if you use the Advanced Verify schedule. If you </a>use the Basic Verify Schedule, verifies will run to completion, and are not limited to a specific duration. </div>
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<span class="Red"> </span><a name="1524882">&nbsp;</a></div>
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<div class="CellBody"><span class="NoteHeading"><a name="1524929">Note:</a></span> When using Basic Verify Schedule and Auto-Verify, if the system is off at the scheduled time, a Verify will start when the system is powered on, if it has been longer than a week since a verify last completed.</div>
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<dt>Related Topics</dt>
<dd>
<div class="RelatedTopic"><a href="Maintain_Units.7.15.html#1144914" name="1675578">Background Tasks</a></div>
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<div class="RelatedTopic"><a href="Maintain_Units.7.27.html#1082252" name="1675582">Viewing Current Task Schedules</a></div>
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<div class="RelatedTopic"><a href="Maintain_Units.7.28.html#1116708" name="1675586">Turning On or Off Use of a Rebuild/Migrate Task Schedule</a></div>
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<div class="RelatedTopic"><a href="Maintain_Units.7.30.html#1515344" name="1675590">Removing a Task Slot from a Schedule</a></div>
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<div class="RelatedTopic"><a href="Maintain_Units.7.31.html#1072535" name="1675594">Adding a New Task Schedule Slot</a></div>
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<dd>
<div class="RelatedTopic"><a href="Maintain_Units.7.25.html#1196480" name="1675598">Background Task Prioritization</a></div>
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