Glauber Costa cdeab4a3d3 cql3: provide a mechanism to get a timestamp higher than any ...

It is common for some operations, like system table updates, to try and guarantee
some particular ordering of operations.

The way Origin does it, is by simply incrementing one to the current timestamp.
Our calls, however, are being dispatched through our internal query processor, which
has a builtin client_state.

Our client_state has a mechanism to guarantee monotonicity, by adding 1 if needed
to operations that happen subsequentially. By using a clock that is not wired up
to this mechanism, we can't really guarantee that if other operations happened to
get in between.

If we expose this mechanism through the query_processor, we will be able to guarantee
that.

Signed-off-by: Glauber Costa <glommer@cloudius-systems.com>

2015-07-09 00:12:08 -04:00

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