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Data Centre Costs

These cost figures for temporary and permanent storage at the RAL Atlas petabyte store were obtained from David Corney and Andrew Sansum at RAL. It is understood that predicting equipment costs more than 5 years into the future provides estimates rather than hard figures, and David and Andrew's help is much appreciated.

Disc cache

The disc cache will hold a temporary cache of high and low level data. Following a solar event, a request will be triggered to transfer data products from the Stanford data centre to the UK data centre at RAL. While this data is held in the temporary cache, user requests from the UK will be directed to the RAL data centre; once the temporary storage time has expired, UK user requests will be redirected to the Stanford archive.

It is assumed that a single solar event will generate a request for 24 hours of raw (2TB) and high level (1TB) of data. The cost figures below assume that it is possible for at least one solar event to occur every 24 hours, so keeping data in a temporary cache for 10 days would require a 30 TB cache while keeping data for 90 days would require a 270 TB cache.

30 TB

Year New Data (TB) Cumulative Data (TB) Storage Media Media Costs (excl VAT) (K) Staff Costs(K) Total Charge (K)
2008 30 30 Disc 1 20 12.6 32.6
2009 30 30 Disc 1 0 13 13
2010 30 30 Disc 1 0 13.4 13.4
2011 30 30 Disc 1 0 13.8 13.8
2012 30 30 Disc 2 20 14.2 34.2
2013 30 30 Disc 2 0 14.6 14.6
2014 30 30 Disc 2 0 15 15
Total Cost, 30TB, 2008-2014: 136,600

270 TB

Year New Data (TB) Cumulative Data (TB) Storage Media Media Costs (excl VAT) (K) Staff Costs(K) Total Charge (K)
2008 30 30 Disc 1 175 63 238
2009 30 30 Disc 1 0 64.9 64.9
2010 30 30 Disc 1 0 66.8 66.8
2011 30 30 Disc 1 0 68.8 68.8
2012 30 30 Disc 2 175 70.9 246
2013 30 30 Disc 2 0 73 73
2014 30 30 Disc 2 0 75.2 75.2

Total Cost, 270TB, 2008-2014: 832,700

Tape storage

The tape storage will hold a permanent archive of specified low and high level data products for the lifetime of the SDO mission (late 2008 - mid-2014). The following cost figures assume that one 32 MB HMI filtergram and eight 32 MB AIA filtergrams are sampled every 1000 seconds and stored uncompressed, accumulating over 7 years.

Year New Data (TB) Cumulative Data (TB) Tape Media Media costs (excl. VAT) (K) Service Costs(K) Total Charge (K) Cost source
2008 11.5 12 9940B 3.5 5.8 9.2 estimated
2009 11.5 23 Titanium 1 2.8 11.5 14.3 estimated
2010 11.5 35 Titanium 1 1.4 17.3 18.6 estimated
2011 11.5 46 Titanium 1 1.4 23.0 24.4 estimated
2012 11.5 58 Titanium 2 6.9 28.8 35.7 estimated
2013 11.5 69 Titanium 2 3.5 35.5 39.0 extrapolated
2014 11.5 81 Titanium 2 3.5 42.3 45.8 extrapolated

Total Costs, 80.5TB cumulative tape store, 2008-2014: 177,800

-- ElizabethAuden - 02 May 2005

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Topic revision: r1 - 2005-05-02 - ElizabethAuden
 
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