61 lines
3.6 KiB
HTML
61 lines
3.6 KiB
HTML
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta name="DC.Title" content="Disk pool groups" />
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<title>Disk pool groups</title>
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</head>
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<body id="rzalydiskpoolgroups"><a name="rzalydiskpoolgroups"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Disk pool groups</h1>
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<div><p>A disk pool group is made up of a primary disk pool and zero or more secondary
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disk pools. Each disk pool is independent in regard to data storage, but in
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the disk pool group they combine to act as one entity. If you make one disk
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pool available or unavailable, the rest of the disk pools in the group are
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also made available or unavailable at the same time. Also, in a clustered
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environment, all of the disk pools in a group switch to another node at the
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same time. </p>
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<p>An example of a practical use for a disk pool group is to isolate journal
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receivers from the objects for which they contain journal entries. The primary
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disk pool might contain the libraries, journals, and objects to be journaled,
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while the secondary disk pools might contain the associated journal receivers.
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The journals and journal receivers remain separate for maximum performance
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and recoverability, but they function together in the disk pool group. </p>
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<p>If you delete a disk pool in a disk pool group,
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be aware of the effects it could have on other disk pools in the group. For
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example, when the original primary disk pool for a secondary disk pool is
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deleted, the existing secondary disk pool can be linked to a new primary disk
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pool only if that primary disk pool has never been made available.</p>
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<p>Disk pool groups can only be implemented on OS/400<sup>®</sup> V5R2 or i5/OS™ V5R3 and later.</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzalyconcepts.htm">Independent disk pools</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="rzalyterminology.htm">Independent disk pool terminology</a></div>
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<div><a href="rzalyiasptypes.htm">Types of disk pools</a></div>
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</div>
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</div>
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