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Re: Maximum number of parallel connections?

From: Dirk Manske <>
Date: Sat, 19 Feb 2011 01:43:58 +0100

On Friday 18 February 2011 21:54:52 Felix E. Klee wrote:
> I wrote a daemon for downloading data from web-services using cURL
> Multi. The daemon runs on a 32bit Amazon EC2 instance with the Amazon
> Linux AMI (CentOS).
> Now, I wonder: How many downloads can be run in parallel? What are the
> limiting factors?
You can show the soft limit of open file descriptors with 'ulimit -n'

But virtual servers have lower limits (open files/sockets)
than the OS could normaly handle.
I don't know the limits of EC2, but it should documented somewhere.

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Received on 2011-02-19