public void LeastShardAllocationStrategy_must_not_rebalance_when_regions_are_unreachable()
{
var member1 = NewUpMember("127.0.0.1");
var member2 = NewUpMember("127.0.0.2");
// multiple versions to simulate rolling update in progress
var allocationStrategy =
new TestLeastShardAllocationStrategy(rebalanceThreshold: 2, maxSimultaneousRebalance: 100, () => new CurrentClusterState().Copy(members: ImmutableSortedSet.Create(member1, member2), unreachable: ImmutableHashSet.Create(member2)), () => member2);
var allocations = CreateAllocations(aCount: 5, bCount: 5);
allocationStrategy.Rebalance(allocations, ImmutableHashSet <string> .Empty).Result.Should().BeEmpty();
allocationStrategy.Rebalance(allocations, ImmutableHashSet.Create("001", "002")).Result.Should().BeEmpty();
allocationStrategy.Rebalance(allocations, ImmutableHashSet.Create("001", "002", "051", "052")).Result.Should().BeEmpty();
}
public void LeastShardAllocationStrategy_must_not_rebalance_when_rolling_update_in_progress()
{
var member1 = NewUpMember("127.0.0.1", version: AppVersion.Create("1.0.0"));
var member2 = NewUpMember("127.0.0.1", version: AppVersion.Create("1.0.1"));
// multiple versions to simulate rolling update in progress
var allocationStrategy =
new TestLeastShardAllocationStrategy(absoluteLimit: 1000, relativeLimit: 1.0, () => new CurrentClusterState().Copy(members: ImmutableSortedSet.Create(member1, member2)), () => member1);
var allocations = CreateAllocations(aCount: 5, bCount: 5);
allocationStrategy.Rebalance(allocations, ImmutableHashSet <string> .Empty).Result.Should().BeEmpty();
allocationStrategy.Rebalance(allocations, ImmutableHashSet.Create("001", "002")).Result.Should().BeEmpty();
allocationStrategy.Rebalance(allocations, ImmutableHashSet.Create("001", "002", "051", "052")).Result.Should().BeEmpty();
}
public void LeastShardAllocationStrategy_must_not_rebalance_when_members_are_joining_dc()
{
var member1 = NewUpMember("127.0.0.1");
var member2 =
Member.Create(
new UniqueAddress(new Address("akka", "myapp", "127.0.0.2", 252525), 1),
ImmutableHashSet <string> .Empty,
member1.AppVersion);
// multiple versions to simulate rolling update in progress
var allocationStrategy =
new TestLeastShardAllocationStrategy(absoluteLimit: 1000, relativeLimit: 1.0, () => new CurrentClusterState().Copy(members: ImmutableSortedSet.Create(member1, member2), unreachable: ImmutableHashSet.Create(member2)), () => member2);
var allocations = CreateAllocations(aCount: 5, bCount: 5);
allocationStrategy.Rebalance(allocations, ImmutableHashSet <string> .Empty).Result.Should().BeEmpty();
allocationStrategy.Rebalance(allocations, ImmutableHashSet.Create("001", "002")).Result.Should().BeEmpty();
allocationStrategy.Rebalance(allocations, ImmutableHashSet.Create("001", "002", "051", "052")).Result.Should().BeEmpty();
}