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OceanStor UltraPath for vSphere V100R008C50 User Guide 06

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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Introduction to OceanStor UltraPath for vSphere

Introduction to OceanStor UltraPath for vSphere

When setting up your storage network, you surely want it to be available 24/7 hours. Also, when the service load is heavy, data traffic is automatically controlled to prevent data blocking; when a link is faulty, the network actively detects the fault and switches the data on the faulty link to other normal links. To meet these needs of yours, Huawei has developed OceanStor UltraPath for vSphere (UltraPath for vSphere) to work with your OceanStor storage system.

About OceanStor UltraPath for vSphere

OceaStor UltraPath for vSphere (UltraPath for vSphere for short) is a piece of multipathing software developed by Huawei Technologies Co., Ltd (Huawei for short). UltraPath for vSphere runs on VMware Pluggable Storage Architecture (PSA) as a third-party plug-in and works with VMware's Native Multipathing Plugin (NMP) without interference, as shown in Figure 1-1. UltraPath for vSphere manages data transfer between ESXi hosts and OceanStor storage systems. The UltraPath improves the efficiency and reliability of data transfer between an application server and a storage system, serving as a simple, convenient, and efficient storage path management solution.
Figure 1-1  Basic network diagram of UltraPath for vSphere

Functions and Features

UltraPath for vSphere provides the following functions and features:
  • Optimal path selection

    By accessing LUN configuration information of a storage system, UltraPath for vSphere finds the fastest path to transfer each data stream to the storage system and uses the path for data transfer. For details, see Optimum Path Selection.

  • Failover and failback

    UltraPath for vSphere automatically and periodically monitors path status. Once a path is found faulty, UltraPath for vSphere switches data on the faulty path to another normal one. After the faulty path recovers, the software switches the data back to the path. During the failover and failback processes, services on the application server remain online and applications continue to meet reliability and service level agreement (SLA) requirements. For details, see Failover and Failback.

  • I/O load balancing

    If there are more than one optimum path between the application server and the storage system, UltraPath for vSphere balances I/O load on these optimum paths to boost I/O performance. For details, see I/O Load Balancing.

  • Performance monitoring

    UltraPath for vSphere monitors IOPS and bandwidth on LUNs, physical paths, and logical paths. The monitored statistics serves as a basis for routine maintenance and service analysis. For details, see Performance Monitoring.

  • Path fault alarming

    If a data transfer path has a fault or risk, UltraPath for vSphere reports a path warning. The warning, together with failover and failback, lowers the service interruption risk by helping users detect and resolve potential faults in time. For details, see Path Fault Warning.

Application Scenarios

UltraPath for vSphere is applicable to the following scenarios:
  • Dual-link direct connection
  • Dual-link single-switch interconnection
  • Dual-link dual-switch interconnection
These three applications have their own advantages and applicable scenarios. For details about application scenarios, see Application Scenarios.

Installation and Use

The installation program of UltraPath for vSphere is accessible from the delivery-attached CD-ROM. Before installing UltraPath for vSphere, ensure that you have the administrative permission of the installation program.

The installation procedure of UltraPath for vSphere is basically the same as that of other software on the application server. The default settings are optimum. Therefore, the software is ready for use after installation without additional configuration. For details about how to install and use the software, see Installation.
  • In complex scenarios (for example, clusters), some additional settings are required for UltraPath for vSphere to work better. Therefore, pay attention to the notes in installation steps.
  • In a cluster environment, all cluster hosts must be managed by either NMP or UltraPath for vSphere.
  • Different paths of a disk cannot be managed by both the UltraPath for vSphere and NMP.

Routine Maintenance

To learn about the storage network status to identify possible bottlenecks and faults, you can use UltraPath for vSphere to gather statistics about LUNs, physical paths, and logical paths. For details about how to use the software for maintenance, see Routine Maintenance.

Command Reference

UltraPath for vSphere supports CLI so that you can run commands to configure, monitor, manage, and maintain the software. Command types include basic operation commands, system management commands, LUN management commands, and alarm management commands. For details about the CLI commands, see Commonly Used CLI Management Commands.

Updated: 2019-03-06

Document ID: EDOC1000105152

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