berlin.guixsd.org downtime next week

[Ricardo Wurmus]

Hi Guix,

the substitute server at https://berlin.guixsd.org will be
intermittently unavailable from Monday (Oct 23) to Wednesday (Oct 25).

We have to move the servers of the build farm to a different rack in the
data centre.  I will use the opportunity to replace the head node which
serves the substitutes with a more powerful server that the BIMSB
(Berlin Institute for Medical Systems Biology) of the MDC has purchased.

I hope to bring berlin.guixsd.org back online on Oct 24 already, but it
may well be offline until the end of Wednesday.

--
Ricardo

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