Date: Mon, 06 Mar 2006 17:08:06 +1300
To: "Akshay Luther" <[EMAIL PROTECTED]>
From: Reece Arnott <[EMAIL PROTECTED]>
Subject: Re: [Alchemi-users] Problems with scaling grid applications up to
1000 threads on 250 (dynamic) executors
At 04:57 p.m. 6/03/2006, Akshay Luther wrote:
Hi Reece,
My name is Akshay Luther and I am Alchemi's creator and architect.
What you are experiencing may not be a problem at all. The algorithm
used for calculating the nth digit of Pi takes progressively longer
for larger digits of Pi; hence the time taken vs. number of digits is
not linear.
Yeah, I was just in the middle of writing an email saying the same thing
after actually googling for info on the algorithm! Silly me.
If my googling is correct the calculation takes O(n^3) time for each digit
so that fits with the time line.
But my question still stands (now more from an academic point of
understanding how Alchemi works):
I recall there was some discussion of having a a re-scheduler in the
Manager so that the manager can re-issue the thread to another executor if
the executor heartbeat dies (i.e. the executor is stopped). Has that been
implemented?
-------------------------
Reece Arnott
Learning Environments Specialist
School of Business
University of Otago
Dunedin
New Zealand
[EMAIL PROTECTED]
-------------------------
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