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game-servers
Game server architecture, scalability, matchmaking, and backend systems for online games. Build robust, scalable multiplayer infrastructure.
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Game server architecture, scalability, matchmaking, and backend systems for online games. Build robust, scalable multiplayer infrastructure.
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| name | game-servers |
| version | 2.0.0 |
| description | Game server architecture, scalability, matchmaking, and backend systems for online games. Build robust, scalable multiplayer infrastructure. |
| sasmp_version | 1.3.0 |
| bonded_agent | 05-networking-multiplayer |
| bond_type | SECONDARY_BOND |
| parameters | [{"name":"architecture","type":"string","required":false,"validation":{"enum":["dedicated","listen","relay","hybrid"]}},{"name":"scale","type":"string","required":false,"validation":{"enum":["small","medium","large","massive"]}}] |
| retry_policy | {"enabled":true,"max_attempts":5,"backoff":"exponential","jitter":true} |
| observability | {"log_events":["start","complete","error","scale_event"],"metrics":["player_count","server_count","match_time","queue_time"]} |
┌─────────────────────────────────────────────────────────────┐
│ SERVER ARCHITECTURES │
├─────────────────────────────────────────────────────────────┤
│ DEDICATED SERVER: │
│ • Server runs game simulation │
│ • Clients send inputs, receive state │
│ • Best security and consistency │
│ • Higher infrastructure cost │
├─────────────────────────────────────────────────────────────┤
│ LISTEN SERVER: │
│ • One player hosts the game │
│ • Free infrastructure │
│ • Host has advantage (no latency) │
│ • Session ends if host leaves │
├─────────────────────────────────────────────────────────────┤
│ RELAY SERVER: │
│ • Routes packets between peers │
│ • No game logic on server │
│ • Good for P2P with NAT traversal │
│ • Less secure than dedicated │
└─────────────────────────────────────────────────────────────┘
SCALABLE GAME BACKEND:
┌─────────────────────────────────────────────────────────────┐
│ GLOBAL LOAD BALANCER │
│ ↓ │
├─────────────────────────────────────────────────────────────┤
│ GATEWAY SERVERS │
│ Authentication, Routing, Rate Limiting │
│ ↓ │
├─────────────────────────────────────────────────────────────┤
│ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │
│ │ MATCHMAKING │ │ LOBBY │ │ SOCIAL │ │
│ │ SERVICE │ │ SERVICE │ │ SERVICE │ │
│ └─────────────┘ └─────────────┘ └─────────────┘ │
│ ↓ │
├─────────────────────────────────────────────────────────────┤
│ GAME SERVER ORCHESTRATOR │
│ (Spawns/despawns based on demand) │
│ ↓ │
├─────────────────────────────────────────────────────────────┤
│ ┌─────────────────────────────────────────────────────┐ │
│ │ GAME SERVERS (Regional, Auto-scaled) │ │
│ │ [US-East] [US-West] [EU-West] [Asia] [Oceania] │ │
│ └─────────────────────────────────────────────────────┘ │
│ ↓ │
├─────────────────────────────────────────────────────────────┤
│ DATABASE CLUSTER │
│ [Player Profiles] [Leaderboards] [Match History] [Items] │
└─────────────────────────────────────────────────────────────┘
MATCHMAKING FLOW:
┌─────────────────────────────────────────────────────────────┐
│ 1. QUEUE: Player enters matchmaking queue │
│ → Store: skill rating, region, preferences │
│ │
│ 2. SEARCH: Find compatible players │
│ → Same region (or expand after timeout) │
│ → Similar skill (±100 MMR, expand over time) │
│ → Compatible party sizes │
│ │
│ 3. MATCH: Form teams when criteria met │
│ → Balance teams by total MMR │
│ → Check for premade groups │
│ │
│ 4. PROVISION: Request game server │
│ → Orchestrator spawns or assigns server │
│ → Wait for server ready │
│ │
│ 5. CONNECT: Send connection info to all players │
│ → IP:Port or relay token │
│ → Timeout if player doesn't connect │
└─────────────────────────────────────────────────────────────┘
// ✅ Production-Ready: Player Session
public class PlayerSession
{
public string PlayerId { get; }
public string SessionToken { get; }
public DateTime CreatedAt { get; }
public DateTime LastActivity { get; private set; }
private readonly IDatabase _db;
private readonly ICache _cache;
public async Task<PlayerProfile> GetProfile()
{
// Try cache first
var cached = await _cache.GetAsync<PlayerProfile>($"profile:{PlayerId}");
if (cached != null)
{
return cached;
}
// Fall back to database
var profile = await _db.GetPlayerProfile(PlayerId);
// Cache for 5 minutes
await _cache.SetAsync($"profile:{PlayerId}", profile, TimeSpan.FromMinutes(5));
return profile;
}
public async Task UpdateStats(MatchResult result)
{
LastActivity = DateTime.UtcNow;
// Update in database
await _db.UpdatePlayerStats(PlayerId, result);
// Invalidate cache
await _cache.DeleteAsync($"profile:{PlayerId}");
}
}
SCALING TRIGGERS:
┌─────────────────────────────────────────────────────────────┐
│ SCALE UP when: │
│ • Queue time > 60 seconds │
│ • Server utilization > 70% │
│ • Approaching peak hours │
│ │
│ SCALE DOWN when: │
│ • Server utilization < 30% for 15+ minutes │
│ • Off-peak hours │
│ • Allow graceful drain (don't kill active matches) │
├─────────────────────────────────────────────────────────────┤
│ PRE-WARMING: │
│ • Spin up servers before expected peak │
│ • Use historical data to predict demand │
│ • Keep warm pool for instant availability │
└─────────────────────────────────────────────────────────────┘
┌─────────────────────────────────────────────────────────────┐
│ PROBLEM: Long matchmaking times │
├─────────────────────────────────────────────────────────────┤
│ SOLUTIONS: │
│ → Expand skill range over time │
│ → Allow cross-region matching │
│ → Reduce minimum player count │
│ → Add bots to fill partial matches │
└─────────────────────────────────────────────────────────────┘
┌─────────────────────────────────────────────────────────────┐
│ PROBLEM: Server crashes during peak │
├─────────────────────────────────────────────────────────────┤
│ SOLUTIONS: │
│ → Pre-warm servers before peak │
│ → Increase max server instances │
│ → Add circuit breakers │
│ → Implement graceful degradation │
└─────────────────────────────────────────────────────────────┘
┌─────────────────────────────────────────────────────────────┐
│ PROBLEM: Database bottleneck │
├─────────────────────────────────────────────────────────────┤
│ SOLUTIONS: │
│ → Add caching layer (Redis) │
│ → Use read replicas │
│ → Shard by player ID │
│ → Queue non-critical writes │
└─────────────────────────────────────────────────────────────┘
| Scale | Players | Servers | Monthly Cost |
|---|---|---|---|
| Small | 1K CCU | 10 | $500-1K |
| Medium | 10K CCU | 100 | $5K-10K |
| Large | 100K CCU | 1000 | $50K-100K |
| Massive | 1M+ CCU | 10000+ | $500K+ |
Use this skill: When building online backends, scaling systems, or implementing matchmaking.