Ansicht
Dokumentation
12470 - to ASP2 or not to ASP2 on new hardware ?
TXBHW - Original Tax Base Amount in Local Currency Fill RESBD Structure from EBP Component StructureThis documentation is copyright by SAP AG.
to ASP2 or not to ASP2 on new hardware ?
Hi Paul,Jorgen & Per-Lennart are totally right. Just 2 disks mirrored is not
sufficient or useful for client copies and sometimes in large systems
as well.
IBM really achieves better performance with the new IOP caches when
used in RAID-5 instead of mirroring. So, the performance is better
then. This would be option 3 of Jorgen.
But, you should never install just 2 disks of a RAID set in ASP2,
because this gives you the same risks as to just use ASP 1 for
everything as Jorgen describes in option 2.
So, you should decide between option 2 or 3 (in my eyes 3 if the
system is really large and needs point-int-time recovery). Only if
you want to have a slow system for mass updates because of the
perhaps "wasted" 8 Disk drives in ASP2 you should go for option 1.
I had several customers in the near past, where we detected after a
lot of time the problem because most people do still use option 1.
Regards
Volker
--- In DoNotReply@consolut.eu, jjoZm... wrote:
>
>
>
>
>
> Paul,
>
> from a performance perspective, you have at least 3 options
>
> 1. Configure an ASP2 the good old way with 2 or more mirrored drives
>
> 2. Configure your system with one system ASP only
>
> 3. Configure an ASP2 with 8 or more drives with RAID-5, managed by
> a dedicated IOP and a dedicated IOA (Raid controller)
>
> Selecting the right option for your configuration depends on many
things,
> of these is the number of transactions the most important (again
from a
> performance perspective).
>
> With 1000 users I would expect that you should go for option 2 or 3,
> never option one, as the number of drives in option one will become
a
> bottleneck. If you think that 8 drives or more in option 3 is too
much
> hardware to "waist" on journal receivers, then go for option 2.
>
> We run our R/3 with one system ASP only.
>
> Med venlig hilsen/Regards
> Mølgaard Data A/S
>
> Jørgen Johansen
> SAP Certified Technical Consultant
> IBM Certified Systems Expert
>
> Phone: +45 64 400 610 Fax: +45 64 400 612 Mobile: +45 20 220 610
> http://www.mgd.dk
>
> Remember... when the sun goes down, iSeries stays up
Durban Tours - Südafrika Safari
CL_GUI_FRONTEND_SERVICES - Frontend Services ROGBILLS - Synchronize billing plans
This documentation is copyright by SAP AG.
Length: 2990 Date: 20240427 Time: 052914 sap01-206 ( 3 ms )
