Hi Noor,
Sorry you were abandoned!
Grid computing is not my specialty (anybody out there??) but I'll see if I
can help. If I follow you, then you have something that looks like the
diagram below. This is typically known as a Resource Broker, right?
+--------+
/| Host 1 |
/ +--------+
/
/
+--------+ +--------+ +--------+
| Client |-----| Broker |----| Host 2 |
+--------+ +--------+ +--------+
\
\
\ +--------+ +-----------------+
\| Host n |---| Available RAM n |
+--------+ +-----------------+
|
| +--------+
+-----| CPU 1 |
| +--------+
|
| +--------+
+ ----| CPU 2 |
| +--------+
|
| +--------+
+-----| CPU n |
+--------+
Are you asking how you can write rules that will control how the Broker
object chooses which Host it should use and to which CPU it should allocate
a job, J, to be completed within some finite time, T?
Perhaps you should take a look at the
Grid Application Framework for Java http://www.alphaworks.ibm.com/tech/gaf4j
See particularly:
http://dl.alphaworks.ibm.com/technologies/gaf4j/GAF4JProgrammingModel.doc
Now, if this isn't what you want or can't be augmented with Jess to make
what you want, then we can continue from there.
Cheers,
Jason
On Jan 8, 2008 4:51 PM, Mohd. Noor < [EMAIL PROTECTED]> wrote:
>
> Thanks all
> The reason I want to use the JESS/rule base is in its flexibilty to update
the attribute as publish/subscribe by using a broker.
> What I means is:
> I have a collection of resources attributes to be published in broker e.g.
I have a collection of hosts with different number of CPUs available and
this always changes over time- this information is updated by the monitoring
daemon in the particular resource to the centralised broker. (The resource
information will be publish into the broker as attribute+value e.g.
{RESOURCES=HARDWARE{CPU_AVAIL= 100,MEM_AVAIL=1GB}}) - how to translate this
into rules or something in JESS?
>
> Then I have a collection of user will request for resource, let say the
user want to run a job and GET results within one hour- this request is send
to the broker. BUT the request is not related with CPU_AVAIL attributes but
rather than their own attribute such as TIME_VALUE. e.g. get me the results
within one hour.
> So that, the broker will decide in which node the job should be run.
>
> Hope this will give an overview to what I am working on.
>
> Cheers
> Mnoor
>
>
>
>
> On Jan 8, 2008 4:31 PM, Jason Morris < [EMAIL PROTECTED]> wrote:
>
> > Hi MNoor,
> >
> > This isn't really a Jess question, but perhaps I can help. The
knowledge domain that you are seeking is called Operations Research. Here
is a wikipedia reference to get you stated:
http://en.wikipedia.org/wiki/Operations_research .
> >
> > An objective function is what you minimize (in the case of cost) or
maximize (in the case of profit, output, or other positive objective) -- in
other words, you are trying to find the values for the independent variables
in the objective function for which its value is optimum These inputs are
often constrained over some domains like [0 <= number_of_CPUs <= 1000].
This optimization is an application of Linear Programming (LP). See
http://en.wikipedia.org/wiki/Linear_programming .
> >
> > So, Is there a particular reason why you have to use rules to solve your
problem? There is a whole branch of applied mathematics which is devoted to
this exact kind of problem. Also, would you please send the *exact* wording
of the problem you have been given? That way, I can say for certain whether
or not an LP approach would be better.
> >
> > Cheers,
> > Jason
> >
> > -----------------------------------------------------------
> > Jason Morris
> > Morris Technical Solutions LLC
> > http://www.morris-technical-solutions.com
> >
> >
> >
> >
> >
> >
> >
> > On Jan 8, 2008 10:55 AM, Mohd. Noor < [EMAIL PROTECTED]> wrote:
> >
> > > Dear all
> > >
> > > What is it means by cost or objective function?
> > >
> > > one more things.
> > > How I am going to map (using rules) between two different attributes
from users and resources
> > > let say user need to run the job and get results in 1 hour
> > > but the resource available is represented in another attribute, say,
the number of CPU available is 100CPUs
> > >
> > > How I am going to translate and map this two different
definition/schema
> > >
> > > Regards
> > >
> > > mnoor
> > >
> >
> >
> >
> > --
> >
> >
>
>
--
-----------------------------------------------------------
Jason Morris
Morris Technical Solutions LLC
http://www.morris-technical-solutions.com
