That may be a good metric for your workload on EC2 virtualized hardware at
different scales; could be useful for regression testing different versions
of Hadoop + Accumulo. Certainly workload and hardware differences could end
up with a different model.
From: Aaron Cordova [mailto:[email protected]]
Sent: Friday, February 24, 2012 2:36 PM
To: [email protected]
Subject: a model for accumulo write scaling performance
In my experience with Accumulo on EC2, I've seen about an 85% increase in
aggregate write rate each time the size of the cluster is doubled. I've
tried to capture that behavior in a model to help myself understand it.
The model I came up with is the following:
where
w: aggregate write rate (writes per second)
m: number of machines
k: standalone single server performance (in my experience about
30k writes per second on average)
the units of k and w are writes per second
for those of you without the ability to see graphics in email, the model is:
w = m * pow(0.85, log(m, 2)) * k
First of all, my algebra may be rusty, so it may be possible to simplify the
model ... second, does the model make sense?
