No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Performance Monitoring Guide

OceanStor Dorado V3 Series V300R002

This document describes performance monitoring of storage systems, including the monitoring method, indicator planning, configuration monitoring, and problem diagnosis.
Rate and give feedback :
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).
Checking the Multipathing Status

Checking the Multipathing Status

If the multipathing mechanism does not work properly, this could be because there are inconsistencies between the working and owning controllers of a LUN which leads to I/O forwarding and performance deterioration.

Multipathing software ensures redundancy, reliability, and high performance of links between a host and a storage system. UltraPath, multipathing software developed by Huawei, is recommended. If the multipathing software delivered with the operating system or third-party multipathing software is used instead of UltraPath, paths may be selected incorrectly due to an inappropriate configuration or compatibility issues. For example, if the multipathing software delivered with an VMware ESXi host is used, you must enable the ALUA protocol, select the Fixed mode, and specify paths. Otherwise, the working controller of a LUN will be switched over repeatedly, leading to I/O forwarding.

NOTE:

All the multipathing descriptions in this document are based on the use of Huawei UltraPath. If the multipathing software provided by the operating system or third-party multipathing software is used, see the related document offered by the multipathing software provider.

  • On a Windows host, open UltraPath Console and check whether links are normal and owning controllers are correct.

  • On a Linux host, check if physical paths are normal by running upadmin show path.
    # upadmin show path 
    ---------------------------------------------------------------------------------- 
     Path ID Initiator Port Array Name  Controller    Target Port     Path State 
        0     10000000c9a1b0ee Array8.1       0A      20080022a10beb2a    Normal     
        1     10000000c9a1b0ef Array8.1       0B      201a0022a10beb2a    Normal     
    ---------------------------------------------------------------------------------- 
    -------------------------------- 
    Check State  Port Type  Port ID  
        --          FC        --     
        --          FC        --     
    --------------------------------

    If Path State is Normal, the paths are working properly.

  • On an AIX host, check if physical paths are normal by running upadm show path.
    # upadm show phypath 
    ------------------------------------------------------------------------------------------ 
     PhyPath ID Initiator Port    Array Name    Controller    Target Port     PhyPath State  
         0       10000000c9aa5d8d  U9_3_A14R_B07      0A      200a0022a104117d     Normal      
         2       10000000c9aa5d8c  U9_3_A14R_B07      0B      201a0022a104117d     Normal      
         1       10000000c9aa5d8c Huawei.Storage      0B      20180022a106358b     Normal      
         3       10000000c9aa5d8d Huawei.Storage      0A      20080022a106358b     Normal      
    ------------------------------------------------------------------------------------------ 
    ---------------------------------------- 
     Check State Port Type    Port ID 
         --            FC         -- 
         --            FC         -- 
         --            FC         -- 
         --            FC         -- 
    ---------------------------------------- 
    Note: When the In Use status of all disks is no, information about all physical paths may not be queried or the results are not the latest data.     

    If Path State is Normal, the paths are working properly.

  • On a VMware ESXi host, check if physical paths are normal by running esxcli upadm show path.
    # esxcli upadm show path 
    ---------------------------------------------------------------------------------- 
     Path ID Initiator Port Array Name Controller    Target Port     Path State  
        0     10000000c9ae9406  HVS.Storage      0B      24110022a10e24d0    Normal    
        1     10000000c9ae9406  HVS.Storage      0A      22010022a10e24d0    Normal    
        2     10000000c9ae9407  HVS.Storage      0A      22000022a10e24d0    Normal    
        3     10000000c9ae9407  HVS.Storage      0B      24100022a10e24d0    Normal    
    ---------------------------------------------------------------------------------- 
    --------------------------------- 
     Check State  Port Type  Port ID  
         --          FC        --     
         --          FC        --     
         --          FC        --     
         --          FC        --     
    ---------------------------------     

    If Path State is Normal, the paths are working properly.

NOTE:

For details about the query methods used in other operating systems, see the UltraPath User Guide specific to different operating systems.

In certain scenarios, links or initiator ports may be absent. If this is the case, you must use UltraPath to check if the number of links and physical connections are consistent. Link absences affect bandwidth performance. In the case of IOPS-sensitive scenarios, it causes I/O forwarding, whereas in bandwidth-sensitive circumstances, it means that the number of physical connections is reduced by one, which reduces the bandwidth.

Translation
Download
Updated: 2019-07-17

Document ID: EDOC1100049152

Views: 11427

Downloads: 77

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next