61 lines
4.0 KiB
HTML
61 lines
4.0 KiB
HTML
|
<?xml version="1.0" encoding="utf-8"?>
|
||
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
|
||
|
|
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
|
<meta name="dc.language" scheme="rfc1766" content="en-us" />
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<meta name="dc.date" scheme="iso8601" content="2005-09-13" />
|
||
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
|
||
|
|
<meta name="security" content="public" />
|
||
|
|
<meta name="Robots" content="index,follow"/>
|
||
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
||
|
|
<title>Storage space balancing</title>
|
||
|
|
<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
|
||
|
|
<link rel="stylesheet" type="text/css" href="ic.css" />
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
|
||
|
|
<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
|
||
|
|
|
||
|
|
<img src="delta.gif" alt="Start of change" /><img src="delta.gif" alt="Start of change" />
|
||
|
|
<a name="rzahqperfstoragespacebalancing"></a>
|
||
|
|
<h3 id="rzahqperfstoragespacebalancing">Storage space balancing</h3>
|
||
|
|
<p>When a storage space is created, the data is spread across the disks in
|
||
|
|
a user specified Auxiliary Storage Pool (ASP), or Independent Auxiliary Storage
|
||
|
|
Pool (IASP). The disks in the pool may be configured to be unprotected, parity
|
||
|
|
protected (RAID-5), or with mirrored protection. Unprotected disks provide
|
||
|
|
no protection against disk failures. Parity protected disks maintain parity
|
||
|
|
sets which allow the recovery if a disk fails in a parity set (but at a performance
|
||
|
|
cost). Mirroring provides protection against disk failures, but with much
|
||
|
|
better performance than parity. The integrated server gains the benefits of
|
||
|
|
the efficient iSeries™ storage architecture, regardless of how an ASP
|
||
|
|
or IASP is configured.</p>
|
||
|
|
<p>The iSeries sever has functions to help maintain the efficient spread of
|
||
|
|
data across the disks. One example is the Start Disk Reorganization (STRDSKRGZ)
|
||
|
|
operation, which balances disk storage utilization. Another is the "Add
|
||
|
|
units to ASPs and balance data" available when hard disk resources are
|
||
|
|
assigned to an ASP. On integrated servers, a storage space will only be moved
|
||
|
|
or rebalanced across disks while the linked server is varied off.</p>
|
||
|
|
<p>The location of the data associated with a storage space is usually automatically
|
||
|
|
managed by the iSeries. There is no need to configure striped volumes
|
||
|
|
or software RAID of the disks within the Windows operating system. Configuring
|
||
|
|
these features in the Windows operating system may actually slow the effective
|
||
|
|
disk operations. Even though the storage is spread across the iSeries disks in
|
||
|
|
small extents, continue to defragment the associated disk on Windows to maintain
|
||
|
|
efficient file-system data structures.</p>
|
||
|
|
<p>You can monitor how well the iSeries is fulfilling the integrated server's
|
||
|
|
disk requirements by using the Work with Disk Status (WRKDSKSTS), Work with
|
||
|
|
Network Server Storage Spaces (WRKNWSSTG), and Work with Network Server Status
|
||
|
|
(WRKNWSSTS) commands. For other performance considerations, realize that integrated
|
||
|
|
servers are Microsoft® Windows servers. You can use Microsoft's
|
||
|
|
Windows Performance Monitor as you would on any other server. See your Microsoft Windows documentation for information about using the Performance
|
||
|
|
Monitor.</p><img src="deltaend.gif" alt="End of change" /><img src="deltaend.gif" alt="End of change" />
|
||
|
|
<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
|
||
|
|
</body>
|
||
|
|
</html>
|