Hi All,
This is my first post to the forum , hoping for guidance/assistance. We are building an e-Commerce self-service system for US and Europe based users to order supplies. The site is planned to be hosted from Belgium to be compliant with EU regulatory laws. The ordering system needs backend integration with our organizations's in-house business processes and those systems are located in US and EU respectively. Every time an order need to be placed or looked up , a webservice call will be made from Belgium data center to respective data centers (US for US users, EU for EU users) . We were told that there is a network latency close 120ms between Europe and US data centers through internal network. We are not sure how to interpret that value to make a decision on whether we need to co-locate the US site to US data center or we can still derive good response times and performance from the system by keeping in US.

My question to the forum is, what is an acceptable value for Network Latency in a situation as ours. We are not counting the network round-trip from browser to the site yet. That would add to the overall user-experience. However the primary concern here is whether the application server making calls to the US data center might choke because of the latency under heavy, concurrent load. Any help or guidance would be greatly appreciated.

check these out

http://www.verizonbusiness.com/about/network/latency/

http://serverfault.com/questions/71304/ ... r-my-users

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"If you're good at anticipating the human mind. It leaves nothing to chance."
-Jigsaw

That sounds reasonable to me and is close to the figure we get from our UK datacentre to the US one.

Round trip or one way?

I ask because I've seen a few customers take some really odd paths from western Europe to the US's east coast.

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http://networking.ventrefamily.com

That will be round trip latency? Any suggestions ?

Specifically, between which two cities?

Belgium to NY isn't the same as Belgium to LA.

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http://networking.ventrefamily.com

Yes. Belgium to NY

I'm not sure of your route to London, but London to NY is typically 70-80ms. Some companies offer transit in the low 60s, but I'm not familiar with them.

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http://networking.ventrefamily.com

From Pittsburgh to most Euro countries its usually right around triple digits.

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"I will prepare and some day my chance will come." - Abraham Lincoln
http://danielhertzberg.wordpress.com - I blog about networks!