[gpfsug-discuss] Client Latency and High NSD Server Load Average

[Kristy Kallback-Rose]

Are you running ESS?


> On Jun 3, 2020, at 2:56 PM, Frederick Stock <stockf at us.ibm.com> wrote:
> 
> Does the output of mmdf show that data is evenly distributed across your NSDs?  If not that could be contributing to your problem.  Also, are your NSDs evenly distributed across your NSD servers, and the NSD configured so the first NSD server for each is not the same one?
> 
> Fred
> __________________________________________________
> Fred Stock | IBM Pittsburgh Lab | 720-430-8821
> stockf at us.ibm.com
>  
>  
> ----- Original message -----
> From: "Saula, Oluwasijibomi" <oluwasijibomi.saula at ndsu.edu>
> Sent by: gpfsug-discuss-bounces at spectrumscale.org
> To: "gpfsug-discuss at spectrumscale.org" <gpfsug-discuss at spectrumscale.org>
> Cc:
> Subject: [EXTERNAL] [gpfsug-discuss] Client Latency and High NSD Server Load Average
> Date: Wed, Jun 3, 2020 5:45 PM
>  
>  
> Hello,
>  
> Anyone faced a situation where a majority of NSDs have a high load average and a minority don't?
>  
> Also, is 10x NSD server latency for write operations than for read operations expected in any circumstance? 
>  
> We are seeing client latency between 6 and 9 seconds and are wondering if some GPFS configuration or NSD server condition may be triggering this poor performance.
>  
>  
>  
>  
> Thanks,
>  
> Oluwasijibomi (Siji) Saula
> HPC Systems Administrator  /  Information Technology
>  
> Research 2 Building 220B / Fargo ND 58108-6050
> p: 701.231.7749 / www.ndsu.edu <http://www.ndsu.edu/>
>  
> 
>  
>  
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