public void Should_ReturnThreeReplicasPerToken()
{
var target = new SimpleStrategy(2);
var testData = ReplicationStrategyTestData.Create();
var result = target.ComputeTokenToReplicaMap(
testData.Ring, testData.PrimaryReplicas, testData.NumberOfHostsWithTokens, testData.Datacenters);
// 3 dcs, 3 hosts per rack, 3 racks per dc, 10 tokens per host
Assert.AreEqual(10 * 3 * 3 * 3, result.Count);
foreach (var token in result)
{
Assert.AreEqual(2, token.Value.Count);
}
}
public void Should_ReturnAllReplicasPerToken()
{
var target = EverywhereStrategy.Instance;
var testData = ReplicationStrategyTestData.Create(
numberOfHostsPerRack: 3, numberOfRacksPerDc: 2, numberOfTokensPerHost: 10);
var result = target.ComputeTokenToReplicaMap(
testData.Ring, testData.PrimaryReplicas, testData.NumberOfHostsWithTokens, testData.Datacenters);
// 3 dcs, 3 hosts per rack, 2 racks per dc, 10 tokens per host
Assert.AreEqual(10 * 3 * 2 * 3, result.Count);
foreach (var token in result)
{
Assert.AreEqual(3 * 3 * 2, token.Value.Count);
}
}
public void Should_ReturnAppropriateReplicasPerDcPerToken()
{
var target = new NetworkTopologyStrategy(
new Dictionary <string, ReplicationFactor>
{
{ "dc1", ReplicationFactor.Parse("2") },
{ "dc2", ReplicationFactor.Parse("3/1") },
{ "dc3", ReplicationFactor.Parse("3/2") }
});
var testData = ReplicationStrategyTestData.Create();
var result = target.ComputeTokenToReplicaMap(
testData.Ring, testData.PrimaryReplicas, testData.NumberOfHostsWithTokens, testData.Datacenters);
// 3 dcs, 3 hosts per rack, 3 racks per dc, 10 tokens per host
Assert.AreEqual(10 * 3 * 3 * 3, result.Count);
foreach (var token in result)
{
// 2 for dc1, 2 for dc2, 1 for dc3
Assert.AreEqual(2 + 2 + 1, token.Value.Count);
}
}
