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Knowledge Base

Slow storage performance when using Fixed Path Policy with multiple VMKernel Ports and Equallogic Storage (1026487)

Last Updated: 7/7/2020Categories: TroubleshootingTotal Views: 14273Language:
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Purpose

This article explains how to improve slow SAN performance when using Fixed Path pathing policy on Dell EqualLogic iSCSI storage arrays with multiple VMKernel Ports.

Resolution

The Default pathing policy for Dell EqualLogic Storage Arrays is Fixed Path; this pathing policy is only valid when using a single VMkernel Port. If you are using multiple VMkernel Ports, then Dell EqualLogic recommends using their Multipathing Extension Module (MEM) or Round Robin (RR) as the pathing policy for ESX 4.x.

Note:

The EqualLogic MEM requires ESX/ESXi 4.1 and/or ESXi 5.0 with Enterprise licensing and array firmware 4.3.7 or higher.

MEM 1.2 is only compatible with vSphere 5.x and certified on EqualLogic firmware version 5.2. For prior versions of vSphere or firmware use MEM 1.1.x.

Using fixed path in a scenario where MEM or RR should be used results in a significant decrease in storage performance.

For more information about the recommended configuration for Dell EqualLogic storage arrays, see:

Configuring and Installing the EqualLogic Multipathing Extension Module for VMware vSphere and PS Series SANs

Best Practices when implementing VMware vSphere in a Dell EqualLogic PS Series SAN Environment

Note: The preceding links were correct as of June 13, 2014. If you find a link is broken, provide feedback and a VMware employee will update the link.

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End Of General Availability of the Free vSphere Hypervisor (ESXi 7.x and 8.x) (2107518)

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从 vSphere 5.x 升级到 6.0 时发生“vCenter Server 5.5 SSL 证书中的系统名称与 vCenter Single Sign-On 5.5 SSL 证书中的系统名称不兼容”错误 (2110943)

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