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A comment on Introducing Cloud Spanner, a Global Database Service. Parent comment

Re:Introducing Cloud Spanner, a Global Database Service by ec109685 on Wednesday February 15, 2017 @12:32AM (#13649972)
9x write amplification isn't that high. If you are setup with a master slave configuration, that creates write amplification and for reliability, you probably have some sort of raid, that increase the number of places writes go to as well.
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Re:Introducing Cloud Spanner, a Global Database Service by inopinatus on Wednesday February 15, 2017 @04:02AM (#13650683)
Not necessarily RAID, it might be an erasure coding.
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