Re: IFS Performance

[vhamberg@xxxxxxxxxxx]

I brought up NetServer performance vs IXS at a user group around here - the 
IBMer said that IXS is more direct - it uses none of the NetServer code path. 
Nor the IFS code path, once you are inside that storage space.

-------------- Original message -------------- 

> It's not the disk. We took files from the IFS and put them on a Wintel 
> server on the IXS card on the same box and it was a much better performer. 
> 
> Rob Berendt 
> -- 
> Group Dekko Services, LLC 
> Dept 01.073 
> PO Box 2000 
> Dock 108 
> 6928N 400E 
> Kendallville, IN 46755 
> http://www.dekko.com 
> 
> 
> 
> 
> 
> "Urbanek, Marty" 
> Sent by: midrange-l-bounces@xxxxxxxxxxxx 
> 01/25/2005 11:44 AM 
> Please respond to 
> Midrange Systems Technical Discussion 
> 
> 
> To 
> 
> cc 
> 
> Subject 
> Re: IFS Performance 
> 
> 
> 
> 
> 
> 
> > ... 
> > So I think there is a basic flaw performance-wise in the IFS. I have no 
> idea why - *TYPE2 was supposed to help, but it is > not enough for me to 
> recommend iSeries as a file server in a high-demand situation. 
> 
> > Vern 
> 
> I've noticed that, too, and wonder about it frequently. I wonder if there 
> is something I am supposed to be doing to "tune" IFS or if, like you said, 
> there is some basic performance flaw. 
> 
> NetServer shares seem very slow compared to other file servers, even on 
> our best machine with plenty of everything. I suspect this is not due to 
> NetServer itself but due to how long it takes it to access the data from 
> IFS. 
> 
> Or, just go into qshell and copy some files/directories around, or even 
> better, delete some recursively (rm -rf blah). If you're working with a 
> fairly complex directory structure, you will experience a long delay which 
> you do not see on Windows or UNIX or even in z/OS USS. 
> 
> Then I think, if IFS has such a hard time just copying and deleting files, 
> how can it possibly do an acceptable job running major Java applications 
> where the programs and the data make heavy use of stream files in the root 
> and QOpenSys file systems? 
> 
> I would love to hear from any IBMers who may have insight into this. 
> 
> Thanks, 
> -Marty 
> 
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