According to this article[0] (that someone referenced below):
A Cloud Spanner “node” isn't a physical machine, per se. It is an allocation of compute capacity and disk access throughput on a set of machines with access to the storage API.
(disclosure: I work at Google Cloud but not on Spanner)
A Cloud Spanner “node” isn't a physical machine, per se. It is an allocation of compute capacity and disk access throughput on a set of machines with access to the storage API.
(disclosure: I work at Google Cloud but not on Spanner)
[0] https://quizlet.com/blog/quizlet-cloud-spanner