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pascalo-
On a bandwidth basis... no cost impact as the Linode account includes 20TB of bandwidth because of the number of machines we're using.
On a server basis, about an extra ~$30 per month for a cheap Linode 4GB... which I'll load balance via a DNS round robin now I'm not on Cloudflare.
So the cost implication per year is about $350 extra.
I'll prep the script, observe it over the next day and then do it if needed.
Velocio
microcosm.appoff of Cloudflare is more than double, verified that we have a fast enough set of SSDs and also several 4Gbps links and should be able to keep up. But, I shall prep a load balanced second cache machine to bear the load if needed.Just watching graphs whilst in meetings... it turns out the Cloudflare Cache Everything Page Rule was doing a lot of heavy lifting.
I'm going to guesstimate that we do around 12TB of traffic per month, but most usage is diurnal and so there is a daytime peak and it's quiet at night.