Discussion:
Extra workload parameter needed?
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Tom Gault
2010-04-04 23:44:47 UTC
Permalink
Which parameter controls the delta_t for the event enqueued in step
II.C.1.4.a? It would seem to me that there should be another exponential
workload parameter: a_i for rate of incoming voice packets. Does that make
sense?

The fact that I'm finding this many inconsistencies this late in the game is
making me worried. Either I don't understand the assignment enough to
confidently make the assumptions that other students are making, or few
other students have gotten as far as me yet, and I'm still on part 1. :S

From Tom G
Asher
2010-04-05 00:23:30 UTC
Permalink
Post by Tom Gault
Which parameter controls the delta_t for the event enqueued in step
II.C.1.4.a? It would seem to me that there should be another exponential
workload parameter: a_i for rate of incoming voice packets. Does that make
sense?
The fact that I'm finding this many inconsistencies this late in the game is
making me worried. Either I don't understand the assignment enough to
confidently make the assumptions that other students are making, or few
other students have gotten as far as me yet, and I'm still on part 1. :S
From Tom G
I mentioned this yesterday in the posted titled 'A3 System Parameters,'
but I haven't had any replies yet.

I also think that there should be a system parameter for this. I would
be interested to know if you think my other ideas make sense.

Asher
Tom Gault
2010-04-05 01:08:23 UTC
Permalink
Oh yeah! Sorry, I forgot about the posts I had read before I understood the
assignment. :S

I would say in real life it would be a good idea to use distinct system
parameters for handling (arrival, connexion) because the CPU may take a
different amount of time to initiate a call than it does to continue a call,
but I could see that detail being omited from this assignment for the sake
of simplicity. However, I think that a_c and our discussed new parameter
are going to have vastly different values (0.5 per hour vs 10 per second) so
I don't think the new parameter is optional.

As for your other system parameter confusion, I assumed (as you suggested)
that one is for a request from the ghost (start an app) and the other is for
a request from the user (app feedback). I can see the need for these to be
distinct.

From Tom G
Post by Asher
Post by Tom Gault
Which parameter controls the delta_t for the event enqueued in step
II.C.1.4.a? It would seem to me that there should be another exponential
workload parameter: a_i for rate of incoming voice packets. Does that make
sense?
The fact that I'm finding this many inconsistencies this late in the game is
making me worried. Either I don't understand the assignment enough to
confidently make the assumptions that other students are making, or few
other students have gotten as far as me yet, and I'm still on part 1. :S
From Tom G
I mentioned this yesterday in the posted titled 'A3 System Parameters,'
but I haven't had any replies yet.
I also think that there should be a system parameter for this. I would be
interested to know if you think my other ideas make sense.
Asher
Tom Gault
2010-04-05 01:26:05 UTC
Permalink
After re-reading the assignment, specifically the new paragraph, I realize I
misunderstood the purpose of the CPU/connection loop: It has nothing to do
with incoming packets. However, I think my assumption still holds.

From Tom G
Post by Tom Gault
Oh yeah! Sorry, I forgot about the posts I had read before I understood
the assignment. :S
I would say in real life it would be a good idea to use distinct system
parameters for handling (arrival, connexion) because the CPU may take a
different amount of time to initiate a call than it does to continue a
call, but I could see that detail being omited from this assignment for
the sake of simplicity. However, I think that a_c and our discussed new
parameter are going to have vastly different values (0.5 per hour vs 10
per second) so I don't think the new parameter is optional.
As for your other system parameter confusion, I assumed (as you suggested)
that one is for a request from the ghost (start an app) and the other is
for a request from the user (app feedback). I can see the need for these
to be distinct.
From Tom G
Post by Asher
Post by Tom Gault
Which parameter controls the delta_t for the event enqueued in step
II.C.1.4.a? It would seem to me that there should be another exponential
workload parameter: a_i for rate of incoming voice packets. Does that make
sense?
The fact that I'm finding this many inconsistencies this late in the game is
making me worried. Either I don't understand the assignment enough to
confidently make the assumptions that other students are making, or few
other students have gotten as far as me yet, and I'm still on part 1.
:S
From Tom G
I mentioned this yesterday in the posted titled 'A3 System Parameters,'
but I haven't had any replies yet.
I also think that there should be a system parameter for this. I would be
interested to know if you think my other ideas make sense.
Asher
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