On Mon, Oct 26, 2015 at 2:19 PM, Greg Young <[email protected]> wrote:

> What are your throughput needs? Latency? Durability?
>

Load-side throughput and latency are both moderately forgiving -- not to an
extreme degree, but the primary use case is a "load" time one, so a couple
of seconds to load a given persistence key is reasonable.  Obviously,
faster is better, but I'm not worried about shaving off milliseconds.
Save-side matters a bit more, although again isn't expecting millisecond
response.  Really, scalability matters more than either; I believe I
understand the MySQL scaling approach for a large sharded table (which is
basically what we'd be talking about here in the medium term), but not well
enough to make me entirely comfortable.

Durability is very important: permanent data loss is unacceptable.
Temporary hiccups on a given persistence key are marginally acceptable, but
definitely ungood.

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