On Dec 12, 2007 5:05 PM, Jeff Gerritsen <[EMAIL PROTECTED]> wrote:
> Chris and et al,
> Back in 1991 I was working for a vegetable seed company using an AS/400.
> I
> created a custom shop floor work order interface and created a background
> queue to process each work order and break them up into individual
> transactions the shop floor system (PRISM) understood. The system worked
> well for over 10 years until they migrated to SAP (that's another
> discussion - let's just say SAP is the first company to name its product
> after what they do to their customers...).
>
> The only additional idea I can offer is too offer a configuration option
> to
> turn on background processing or leave it off.
Ok. Currently in /trunk by default all payments get entered directly.
Currently you have to throw a switch via psql to get it to queue them.
low-end customers almost certainly won't need this feature so there is no
reason to give them something which could require that one keeps a closer
eye on things.
>
>
> Secondly, would adding an option to process 1, 2, or more threaded queues
> balance throughput with performance or would the 2nd and more thread
> queues
> hammer the db too hard?
Currently some portions of the workflow really hammer the web server really
hard, while other parts of the workflow hammer the db really hard. Seems
pretty balanced ;-)
>
>
> BTW, could this idea evolve into something we can use modPerl to process,
> and
> would there be benefit to using modPerl?
Probably would be some benefit, but in the problem cases, the issue has to
do with time taken to format info from the db for human consumption. For
example, pages which list thousands of transactions. Mod_perl has the most
benefit when you have a lot of small hits on the system while in this case,
it probably doesn't make a lot of difference (mod_perl would be a strong
improvement for the POS side, however, since it would reduce latency).
Best Wishes,
Chris Travers
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