adds copy and dump/restore methods #874
Merged
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this will close #862
Caveat is,
copy
is a multi-key command, and when connecting to a Cluster it will throw aCROSSSLOT
error if the keys are resolved to different hashslots. This is by design and enforced by Redis. The expectation is, it is up to the user to take care when calling this method.Possible modification for the future is to return
F[Either[CrossSlotError,A]]
to be explicit about the possibility of error in the return type