funsec mailing list archives

Re: London tube feed halted by huge demand


From: Thomas M Carlsson <thomas () carlsson fm>
Date: Wed, 07 Jul 2010 15:02:37 +0100

On 07/07/2010 11:59, Juha-Matti Laurio wrote:
From an initial 180,000 requests, traffic soared to 10 million hits per week, overloading servers..."

Yep.

In other words, the site was overloaded by a mere 16.5 requests per second.

This sounds like an issue of bad design (i.e. no caching), and even if
it were a bandwidth problem they could've probably mitigated both by
leasing a box running squid as a reverse proxy at a nearby NOC well
before it became necessary to shut the site down.

So, in essence, the issue was poor/slow IT management by TfL.

Thomas

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  Thomas Mannfred Carlsson
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