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OceanStor UltraPath for vSphere 21.3.0 User Guide 03

This document covers the functions, features, installation, configuration, upgrade, uninstallation, maintenance, troubleshooting, and FAQs of OceanStor UltraPath for vSphere (UltraPath forvSphere). UltraPath for vSphere is the multipathing software developed by HuaweiTechnologies Co., Ltd (Huawei for short). The document aims at helping users to be fully familiar with UltraPath for vSphere and its use.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Typical UltraPath Applications

Typical UltraPath Applications

Installed on an application server, UltraPath supports different networks and helps ensure fast and smooth data transfer.

UltraPath is applicable to the following scenarios:

  • Dual-link direct connection
  • Dual-link single-switch interconnection
  • Dual-link dual-switch interconnection
  • Dual-link dual-switch interconnection in a cluster environment
  • Dual-link dual-switch interconnection in a HyperMetro cluster environment

Dual-Link Direct Connection

Dual-link direct connection is the simplest and most inexpensive storage network connection, as shown in Figure 1-10.

Figure 1-10 UltraPath in dual-link direct connection

The application server uses optical fibers to connect different storage controllers for redundancy. In this networking mode, the path between the application server and the LUN's owning controller is the optimum one while other paths stand by.

In normal cases, UltraPath selects the optimum path for data transfer. If the optimum path is down, another standby path is used. After the optimum path recovers, it takes over data transfer again.

Dual-Link Single-Switch Interconnection

The dual-link single-switch interconnection adds one switch on the basis of dual-link direct connection, improving data access and forwarding capabilities, as shown in Figure 1-11.

Figure 1-11 UltraPath in dual-link single-switch interconnection

In Figure 1-11, there are four paths between the application server and the storage system. In this networking mode, the two paths between the application server and the LUN's owning controller are optimum while other two paths stand by.

A switch expands host ports to improve access capability of the storage system. Besides, a switch extends the supported distance of transfer so that a remote application server can connect to the storage system through the switch. As only one switch is available in this networking mode, it may encounter a single point of failure. To prevent the failure, you can adopt Dual-Link Dual-Switch Interconnection, as shown in Figure 1-12.

Dual-Link Dual-Switch Interconnection

Dual-link dual-switch interconnection adds one switch on the basis of dual-link single-switch interconnection to provide dual-switch forwarding, as shown in Figure 1-12.

Figure 1-12 UltraPath in dual-link dual-switch interconnection

With two switches, the network prevents switch single points of failure to boost the network stabilization.

Dual-Link Dual-Switch Interconnection in a Cluster Environment

On the basis of dual-link dual-switch interconnection, one or more application servers are added to form a cluster environment, which enhances the reliability and processing capability of the application services, as shown in Figure 1-13.

Figure 1-13 Dual-link dual-switch interconnection in a cluster environment

Dual-Link Dual-Switch Interconnection in a HyperMetro Cluster Environment

The dual-link dual-switch interconnection in a HyperMetro cluster environment improves the reliability and processing capability of the application servers. However, a single storage system is a hidden danger to cause a single point of failure in the entire storage network. Two storage systems back up each other in this scenario, greatly improving system reliability, as shown in Figure 1-14.

Figure 1-14 Dual-link dual-switch interconnection in a HyperMetro cluster environment

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Updated: 2019-06-29

Document ID: EDOC1100052672

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