Administrator Guide

Enable Live Volume ALUA Optimization
Use the ALUA optimization wizard to enable ALUA optimization on existing Live Volumes that are eligible to be upgraded.
1 Click the Replications & Live Volumes view.
2 Click the Live Volumes tab.
The Live Volumes view is displayed.
3 In the right pane, a Live Volume ALUA banner message is displayed. The message informs the user that Live Volumes are available that
are eligible for ALUA optimization. On the right side of the banner, click Update to ALUA Optimized.
The Update to ALUA Optimized wizard opens. The rst dialog box displays a list of Live Volumes that are not ALUA optimized but are
capable of becoming ALUA optimized.
NOTE: The Live Volume ALUA banner message is displayed if Storage Manager detects one or more Live Volumes that have
not been ALUA optimized and both Storage Centers support ALUA optimization.
4 Select the Live Volumes that you want to optimize and click Next.
The next dialog box displays a warning message and an option to reset the secondary server mappings.
• If you select the Reset Secondary Server Mappings checkbox, the server mappings of the Secondary Live Volumes are reset and
will cause an immediate outage. A manual rescan must be performed.
• By default, the Reset Secondary Server Mappings checkbox is cleared. This will not cause an outage. The secondary side servers
must be restarted later during a maintenance operation.
NOTE
: Because enabling Live Volume ALUA is a disruptive process, is should be performed during a maintenance operation.
5 Click Next.
The next dialog box displays a warning message and an option to enable or disable reporting non-optimized paths.
• By default, the Report Non-optimized Paths checkbox is selected. This will cause Live Volumes to report non-optimized ALUA
paths from the secondary system.
• If you clear the Reset Secondary Server Mappings checkbox, Live Volumes will not report non-optimized ALUA paths from the
secondary system.
NOTE
: When all paths are reported as non-optimized, Microsoft Multipath Input Output (MPIO) drivers will not perform
round-robin path usage as expected. As a result, data transfer is reduced to a single path and causes a long delay for
failover. Therefore, using non-optimized paths is not recommended in Microsoft Windows environments and non-optimized
path reporting should be disabled.
NOTE: Certain Windows Server 2016 versions can support non-optimized path reporting properly. For more information and
best practice guidelines for conguring MPIO on Microsoft Server 2016, refer to Dell EMC SC Series Storage and Microsoft
Multipath I/O white paper located on the Dell support site.
6 Click Finish.
The results of the ALUA optimization process are displayed.
7 Click OK.
Enable or Disable Non-Optimized Path Reporting
When Live Volume ALUA is enabled, non-optimized paths are reported by default. However, this setting can be enabled or disabled to
optimize path I/O.
1 Click the Replications & Live Volumes view.
2 Click the Live Volumes tab.
The Live Volumes view is displayed.
3 In the Live Volume attribute pane, click Edit Settings.
The Edit Live Volume Settings dialog box opens.
Storage Center Replications and Live Volumes
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