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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).


UltraPath can meet the requirements on high reliability and superb performance of storage networks. This section introduces the background, purpose, and benefits of UltraPath.

As modern technology develops, the requirements laid upon the security and stability of storage networks increase during the implementation of IT infrastructure. A fault in the storage network may cause the entire network to break down. Such a fault is called a single point of failure in the storage network. To avoid this, a highly reliable storage network not only includes redundant devices and components, but also adopts the interconnection of redundant links, as shown in Figure 1-1. The redundancy design can improve the reliability as well as the performance of the entire storage network. The multipathing technology helps achieve this goal.
Figure 1-1 Multi-path networking

The multipathing technology is realized through multipathing software. If a path fails or cannot meet the performance requirement, multipathing software automatically and transparently transfers I/Os to other available paths to ensure that I/Os are transmitted effectively and reliably. As shown in Figure 1-2, multipathing software can handle many faults such as HBA faults, link faults, and controller faults.

Figure 1-2 UltraPath handling path faults

The multipathing software (normally called Multi-Path I/O, MPIO) built-in host operating systems only provides basic failover and load balancing functions, failing to meet the high reliability requirements. Huawei UltraPath cannot only provide these basic functions, but also meet the systems' demands on reliability, performance, maintainability, and adaptation with many advanced functions such as path test, all paths down protection, path isolation, path alarm pushing, and path performance monitoring. Furthermore, UltraPath has better compatibility with Huawei storage. You are advised to use UltraPath for Huawei storage if you do not have any special requirements.

UltraPath is compatible with different host operating systems. For details,click OceanStor Interoperability Navigator.

Updated: 2019-06-29

Document ID: EDOC1100052672

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