[Pvfs2-users] Re: strong and weak scaling non-contiguous parallel benchmark

[Nirmal Thacker]

Nirmal Thacker wrote:
> Hello,
>
> Would any of you be aware of a benchmark out there which performs both
> strong scaling and weak scaling for non-contiguous/sequential accesses
> parallel I/O?
>   
*edit: contiguous/sequential accesses
*not non-contig
*
> For eg, in IOR , the work per process/processor/node is constant. Hence
> an increase in processes/processors/nodes will increase the total amount
> of data written to the remote disk. This is how I have used IOR. And
> this would classify as weak scaling.
>
> However I am looking for a benchmark which performs strong scaling
> wherein the overall work is constant and irrespective of varying the
> processes/processors/nodes.
>
> AFAIK IOR does not perform strong scaling. I have heard that the NAS
> benchmarks perform strong scaling, but do they also perform weak scaling?
>
> Moreover are the accesses *[edit:]contiguous*?
>
> Nirmal Thacker
>
>