Global Matchmaking System with MemoryStoreService

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#1

So I used HowToRoblox’s global matchmaking system and it worked great when I tested it in my game. When I published my update, I tested it with thousands of people and it seemed to not teleport me at all. I looked at the developer console and it repeated:

MemoryStoreService: RequestThrottled: Recent MemoryStores requests hit one or more limits. API: SortedMap.GetRange, Data Structure: Queue.

My game has around 4-8k players, so that might be the problem. The thing is, I’ve seen other games like Bedwars achieve a matchmaking system.

So how would I approach this?

#2

I haven’t looked at that tutorial you followed, but maybe a leader election system would help you avoid calling an api too many times? Here’s a sample from Roblox of a leader election implementation https://create.roblox.com/store/asset/13595031529/Leader-Election (found on this page)

1 Like
#4

I found a way around my original problem, but I’ve run into another one. The players are able to be teleported, but the queuing doesn’t work correctly.

Ex: The player queues up, but get teleported immediately into a server with little to no people.

Is there anything wrong with this code?

local queue = mss:GetSortedMap("BattleRoyaleQueue-0")

local cooldown = {}
local minPlayers = 10
local maxPlayers = 100
local placeID = 14934765043

--//Functions

local function addToQueue(player)
	queue:SetAsync(player.UserId, player.UserId, 2592000)
end

local function removeFromQueue(player)
	queue:RemoveAsync(player.UserId)
end

--//Events

local matchmakingEvent = rs.Events.Matchmaking

--//Script

matchmakingEvent.OnServerEvent:Connect(function(player, queueType)
	if cooldown[player] then
		return
	end

	cooldown[player] = true
	
	if queueType == "Enter" then
		pcall(addToQueue, player)
	elseif queueType == "Exit" then
		pcall(removeFromQueue, player)
	end

	task.wait(1)

	cooldown[player] = false
end)

game.Players.PlayerRemoving:Connect(removeFromQueue)

local lastOverMin = tick()

while task.wait(3) do
	local success, queuedPlayers = pcall(function()
		return queue:GetRangeAsync(Enum.SortDirection.Descending, maxPlayers)
	end)

	if success then
		local amountQueued = 0

		for i, data in pairs(queuedPlayers) do
			amountQueued += 1
		end

		if amountQueued < minPlayers then
			lastOverMin = tick()
		end
		
		local timeOverMin = tick() - lastOverMin
		
		if timeOverMin >= 60 or amountQueued == maxPlayers then
			local reservedServerAccessCode = tps:ReserveServer(placeID)
			
			for i, data in pairs(queuedPlayers) do	
				local userId = data.value
				local player = game.Players:GetPlayerByUserId(userId)

				if player then
					local success, result = pcall(function()
						tps:TeleportToPrivateServer(placeID, reservedServerAccessCode, {player})
					end)
					
					task.	spawn(function()
						if success then
							task.wait(.25)
							
							pcall(function()
								queue:RemoveAsync(data.key)
							end)
						end
					end)
				end
			end
		end
	else
		warn("Matchmaking error: ".. queuedPlayers)
	end
end
#5

running into the same issue !!

#6

It may be teleporting less than the minimum number of players due to this line having an or instead of an and.

if timeOverMin >= 60 or amountQueued == maxPlayers then

Correct me if I’m wrong though.