[omniORB] Network performance

[Default User]

--- "Ridgway, Richard (London)" <Richard_Ridgway at ml.com> wrote:

> Taking a punt, SOAP was an order of magnitude slower while
> co-located?

No, not in general. Depending on the type of message, SOAP took 
three times as long or more in a round-trip, averaged over many
trials.

> Why would you not expect the latency increase when going over the
> LAN?

I did expect some, but thought that CORBA and SOAP would increase
at about the same rate.

Again, SOAP's performance was essentially the same. Omniorb's degraded 
by an order of magnitude, so that box-to-box it's much worse than
gSOAP.

That doesn't seem right to me, so I'm looking to see if I've made
some error in set-up.

> Simple test below:
> 
> %ping localhost
> PING ......... 56(84) bytes of data.
> 64 bytes from ......... icmp_seq=0 ttl=58 time=0.027 ms
> 
> %ping neighbouring-machine
> PING .......... 56(84) bytes of data.
> 64 bytes from ............. icmp_seq=0 ttl=58 time=0.535 ms

I'll get those numbers.



> -----Original Message-----
> From: omniorb-list-bounces at omniorb-support.com
> [mailto:omniorb-list-bounces at omniorb-support.com] On Behalf Of
> Default
> User
> Sent: 09 November 2007 00:24
> To: omniorb-list at omniorb-support.com
> Subject: [omniORB] Network performance
> 
> 
> I've been doing some test on Linux. I'd gathered some latency numbers
> for a client/server message passing system, with both co-located on
> the
> same box (localhost endpoint).
> 
> I then switched to having the client and server running on different
> Linux boxes in our lab, connected via a simple high-speed LAN. The
> performance went way down. Average latency for sending a message
> increased by an order of magnitude. 
> 
> This was certainly unexpected. A SOAP implementation that I was
> tested
> showed almost no change in latency in similar circumstances. Is there
> something I've set up incorrectly?


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