We had an early 4-cpu (real cpus not cores) SMP box with a (shared) 1Gbps link direct to the (a) backbone. We easily saturated that with 32 threads running bog standard LWP & Digest::MD5--provided we didn't store the data to disk. Even with raided (5 I think) disks, the bottleneck was storing what we could read. That was circa 7 years ago.

To do the job properly at the scale you are talking about, you'd need to run a distributed crawler, each node with dedicated, high-speed, raided local drives--or hugely expensive SSD arrays, and a distributed queueing mechanism.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
RIP an inspiration; A true Folk's Guy

In reply to Re^15: Async DNS with LWP by BrowserUk
in thread Async DNS with LWP by jc

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