Distributed Channel Index Performance Testing

Proposed performance testing matrix, ordered by priority:

Topology (gatling x SG x CBS)	Scenario	Load (writers/readers per gatling node)	Description
1 x 2 x 3	gateload, in-memory cache	5K/8K	Baseline
1 x 2 x 3	gateload, distributed index	5K/8K	Distributed index baseline
1 x 2 x 3	gateload, distributed index	10K/16K	Higher load on baseline
1 x 5 x 5	gateload, distributed index	5K/8K	Large cluster.
1 x 20 x 5	gateload, distributed index	5K/8K	Larger SG cluster - tests higher contention on writes.
1 x 10 x 10	gateload, distributed index	20K/20K	Ramping up load, cluster size
1 x 2 x 3	access, in-memory cache	5K/8K	Baseline
1 x 2 x 3	access, distributed index	5K/8K	Distributed index baseline

Notes:

1. Haven't yet described tests where only a subset of the SG nodes are identified as index writers. In those scenarios, gateload traffic should be directed to the non-index-writer nodes.