Few questions about the service "Hosted Metrics"


I have few questions not seen in FAQ about the service “Hosted Metrics”.

How to manage the hosted metrics ? Here are some use cases :

I have temporary series which have a short lifetime. Serie is created, fed few days and then no more fed. How to delete them ? Is there some automatic cleaning up to delete all dead series ?

I have sent invalid/obsolete series. I want to delete them manually, how to do that ?

I want to modify retentions of existing hosted series, as I’d do using the whisper-resize utility. Is it possible ?

If I stop the subscription, is there a mean to get back all my series ?

Could you publish the pricing ? How much cost 1 tonne ?