PowerFlex: threads are not changed during PowerFlex NDU

Summary: Legacy PowerFlex Manager (PFxM) does not change the SDS threads during a PowerFlex NDU (Nondisruptive upgrade).

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Symptoms

In this scenario, the user upgraded the Intelligent Catalog (IC) from version 38.364.00 to 38.365.00 using PFxM 3.8.6 Build 79.

Querying the performance parameters for all SDSs shows that some SDSs do not have the same number of OS_THREADS configured:

scli --query_performance_parameters --tech --all_sds --print_all | grep OS_THREADS
        SDS_NUMBER_OS_THREADS                                          8                 8
        SDS_NUMBER_OS_THREADS                                         10                 8
        SDS_NUMBER_OS_THREADS                                          8                 8
Note: The difference in SDS_NUMBER_OS_THREADS per SDS does not impact the upgrade.

 

Impact 

The expected performance might not meet expectations.

Cause

There is a flaw in the PFxM automation code that is not updating all SDS_NUMBER_OS_THREADS to be the same during an NDU.

Resolution

1. SSH to the PMDM and login using SCLI
2. Set the SDS_NUMBER_OS_THREADS on all SDSs accordingly:

Note: The difference in SDS_NUMBER_OS_THREADS per SDS does not impact the upgrade. 
scli --set_performance_parameters --all_sds --tech --sds_number_os_threads <set_value>
 
#example
scli --set_performance_parameters --all_sds --tech --sds_number_os_threads 10
Successfully set the performance parameters

 

Impacted Versions

PFxM 3.8.6 Build 79 and lower

Fixed In Version

PFxM 3.8.6

PFMP 4.5.x

Affected Products

PowerFlex rack, PowerFlex Appliance, PowerFlex custom node
Article Properties
Article Number: 000227120
Article Type: Solution
Last Modified: 08 Jul 2025
Version:  2
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