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Chapter 4: Basic Operation

Best Practices for Optimal Performance

QX and QXS Setup Guide 125

Caution:If the system is used in a VMware environment, set the system’s Missing LUN Response

option to use its Illegal Request setting. To do so, see either the configuration topic “Changing the

missing LUN response” in the QXS Storage Disk Storage Management Utility Users Guide or the

command topic “set-advanced-settings” in the QXS Storage CLI Reference Guide..

Best Practices for Optimal Performance

Table 11 below lists features that can negatively impact performance on your system and recommendations

for minimizing the impact.

For more information on an item, see either the QXS Storage CLI Reference Guideor the QXS Storage Disk

Storage Management Utility Users Guide..

Feature Impact Recommendationsfor

minimizingimpact

Managed logs The managed logs function collects information at least once

every 12 hours. While collecting information, the system

might experience increased I/O response time and/or I/O

time-outs.

Disable managed logs

through Disk Storage

Management Utility or the

CLI.

Active Disk

Storage

Management

Utility, CLI, SMI-

S, and SNMP

sessions

Active Disk Storage Management Utility, CLI, SMI-S, and

SNMP sessions collect information up to 4 times per hour.

While collecting information, the system might experience

increased I/O response time and/or I/O time-outs.

Note:Use of SMI-S and SNMP traps does not

affect performance.

Use the Disk Storage

Management Utility, the

CLI, SMI-S, and SNMP

during non-peak hours.

Table11:Solutions to degraded performance

Quantum QXS Series User Manual

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