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M/S is Master/Slave: https://developers.google.com/appengine/docs/python/datastor...

HRD is High Replication Datastore: https://developers.google.com/appengine/docs/adminconsole/mi...

M/S is deprecated, and HRD is the new hotness (and it conveniently costs more).

I think it cost the same, when it was first out it cost more, but now it cost the same.

The rates are the same ($1 per million writes and $0.70 per million reads beyond the daily free threshold), but the daily free threshold is 0.05 million of each for master/slave, and 0.01 million of each for high-replication.

For small applications it costs more because of thresholds for free services is lower. In our case it costs a lot more since some of things we were doing need another instance on HRD that we didn't need on M/S

Thank You very much. That puts a lot of context to what I read in the report.

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