Hi Arun,
On Tue, Aug 21, 2012 at 11:18 PM, Arun Venkataswamy arun...@gmail.comwrote:
I am trying out a FreeSWITCH based VoIP system. There is a considerable,
around 1.5 seconds lag on the audio. Some improvement was seen when the
server was switched from an Amazon EC2 small instance to an Amazon EC2
medium instance. Considering India specific customers and usage, is it
reasonable to assume that I will get substantial improvement by moving to a
dedicated server (quad code, 4GB RAM) based geographically inside India?
Can anyone throw some light on this? Also would like to get recommendations
to an India based dedicated server provider. Thanks.
I didn't fully get your explanation here: Please correct me if I'm wrong:
I'm assuming you have a FreeSWITCH based system in India which talks to the
business logic server hosted out of EC2.
Although Amazon claims the IO performance to be moderate for both Small
and Medium instances, I've personally noticed significant variations in the
small instance IO performance due to contention for resources (more small
EC2 instances on the same machine, lesser medium EC2 instances on the same
machine; medium instances are pooled together and you may never usually
find medium and small together on the same real servers)
Some things you may want to check:
1. Is singapore your EC2 availability zone? If not, it may be worth moving
it to singapore to see a significant improvement in latency between your
indian FreeSWITCH service and the
2. Instead of a dedicated server, you may want to look at the High I/O
instance: http://aws.amazon.com/ec2/instance-types/ (I'm not sure if this
is available in the Singapore availability zone; I haven't personally used
high I/O instances)
3. Monitor your app and the system's performance. Is Network I/O your
bottleneck? Is disk I/O your bottleneck?
cheers,
-Suraj
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