Please create an account to participate in the Slashdot moderation system


Forgot your password?
Check out the new SourceForge HTML5 internet speed test! No Flash necessary and runs on all devices. ×

Comment Single data centre for critical resource? (Score 2) 239

Blimey I wouldn't do that and running a bog standard stream service never mind an airline with 100 million a day of revenue.

500 servers is about 50 racks. About 500,000 a year plus about 2,000,000 for kit and 4,000,000 for software and licenses and 250,000 for interconnect . So capex 6,000,000 and opex call it 1,000,000 per annum.

I normally rate a major dc failure ( more than 10min ) at about once every 5 years.

Easy business case.

Also generator and ups fail over is tough to test with one dc. Which hit this one bad.

Comment Putin could do a nasty (Score 1) 296

Insist all Russian sites use a set of authorised ssl certificate authorities. Then insist Russian we browsers honour that list ( as internationally they would be de registered / not trusted in pem list ). Then the agency can spoof / proxy https traffic with access to cert authority private keys.

Comment Solar storage well known solutions (Score 1) 231

1) pump hydro ideal for Chile. Find a mountain with 2 lakes 1000m vertical apart. Pump water up at peak solar. Same turbines pump power onto grid after hours.
2) solar thermal - use mirrors to heat liquid salts from nominal to up to 800 degrees Celsius. Give you up to 6 hours outside solar hours to use tradition steam turbines to generate.
3) more long term - use batteries in vehicles and houses to charge in day and release outside solar hours
4) old school - use cheap power in daytime to power power intensive processes such as aluminium smelting
5) basic - heat up water in black bins on roof to provide hot water after hours

Slashdot Top Deals

Happiness is a positive cash flow.