Comment on Facebook open sources its servers and data centersComments−iloveponies15yOne thing I've found interesting: The decision to have batteries not per server like Google, or per data centre, but per group of racks.−Swannie15yPretty standard in telecoms. Never quite understood why Google went per server.−iloveponies15yTheir claims were that the efficiency was that great, and that it's acceptable to pay the extra few dollars in motherboard manufacture to build it in.−Swannie15yI guess in their instance the lifetime of the server was never likely to be eclipsed by that of the battery. In telco, 15-20yrs of operation is not uncommon, so a single set of replaceable/easily service batteries is important.
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One thing I've found interesting: The decision to have batteries not per server like Google, or per data centre, but per group of racks.
Pretty standard in telecoms. Never quite understood why Google went per server.
Their claims were that the efficiency was that great, and that it's acceptable to pay the extra few dollars in motherboard manufacture to build it in.
I guess in their instance the lifetime of the server was never likely to be eclipsed by that of the battery. In telco, 15-20yrs of operation is not uncommon, so a single set of replaceable/easily service batteries is important.