Redis vs Memcached
2026年、最適なツールを選ぶための詳細比較
🏆 クイック判定
勝者: Redis
Redis is the more versatile choice for most use cases, offering rich data structures, persistence, and pub/sub. Memcached excels as a pure, high-performance cache when simplicity is key.
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📊 Visual Comparison
総合スコア比較
カテゴリー別分析
Redis ハイライト
- ✅ Rich data structures (lists, sets, sorted sets, hashes)
- ✅ Built-in persistence options (RDB, AOF)
- 💰 Free (self-hosted) / varies managed
Memcached ハイライト
- ✅ Extremely simple and lightweight
- ✅ Multi-threaded architecture
- 💰 Free (self-hosted) / varies managed
機能比較
| Feature | Redis | Memcached |
|---|---|---|
| Data Structures | Strings, Lists, Sets, Hashes, Sorted Sets, Streams | Strings only |
| Persistence | RDB snapshots + AOF | ✗ |
| Replication | Master-replica | No built-in |
| Clustering | Redis Cluster | Client-side sharding |
| Pub/Sub | ✓ | ✗ |
| Lua Scripting | ✓ | ✗ |
| TTL Support | ✓ | ✓ |
| Transactions | MULTI/EXEC | ✗ |
| Modules | RedisJSON, RediSearch, etc. | ✗ |
| Max Value Size | 512MB | 1MB (default) |
Redisとは？
Redis is an open-source, in-memory data structure store used as a database, cache, message broker, and streaming engine. It supports rich data structures beyond simple key-value pairs.
✅メリット
- •Rich data structures (lists, sets, sorted sets, hashes)
- •Built-in persistence options (RDB, AOF)
- •Pub/Sub messaging support
- •Lua scripting for complex operations
- •Cluster mode for horizontal scaling
- •Active community and ecosystem
❌デメリット
- •Higher memory usage than Memcached
- •Single-threaded for commands (I/O is multi-threaded since v6)
- •Licensing changes with Redis Ltd
- •More complex configuration
- •Persistence can impact performance
Memcachedとは？
Memcached is a high-performance, distributed memory object caching system designed for speeding up dynamic web applications by alleviating database load. It's simple, fast, and battle-tested.
✅メリット
- •Extremely simple and lightweight
- •Multi-threaded architecture
- •Lower memory overhead per key
- •Predictable performance
- •Mature and battle-tested at scale
- •Easy horizontal scaling
❌デメリット
- •Only supports simple key-value strings
- •No built-in persistence
- •No pub/sub or messaging
- •No built-in replication
- •Limited max value size (1MB default)
- •Less active development
料金比較
Redis
Free (self-hosted) / varies managed
Open source + managed services
✓ 無料プランありView detailed pricing →Memcached
Free (self-hosted) / varies managed
Open source + managed services
✓ 無料プランありView detailed pricing →📊詳細分析: Redis vs Memcached
RedisとMemcachedのどちらを選ぶかは、両ツールが現代のワークフローに魅力的な機能を提供しているため、難しい選択となることがあります。この包括的な比較では、機能や価格から実際のユースケースまで、あらゆる側面を分析し、情報に基づいた意思決定をお手伝いします。
Redis
Redis is an open-source, in-memory data structure store used as a database, cache, message broker, and streaming engine. It supports rich data structures beyond simple key-value pairs.
Memcached
Memcached is a high-performance, distributed memory object caching system designed for speeding up dynamic web applications by alleviating database load. It's simple, fast, and battle-tested.
🎯最適なユースケース
Redisを選ぶべき時
- ✓チーム向け:
Rich data structures (lists, sets, sorted sets, hashes)
- ✓中小企業向け:
Built-in persistence options (RDB, AOF)
- ✓エンタープライズ向け:
Pub/Sub messaging support
Memcachedを選ぶべき時
- ✓個人向け:
Extremely simple and lightweight
- ✓中小企業向け:
Multi-threaded architecture
- ✓チーム向け:
Lower memory overhead per key
🔍機能の詳細分析
Data Structures
Persistence
Replication
Clustering
Pub/Sub
Lua Scripting
💰価格分析
Redis
Open source + managed services
✅ 無料プランありMemcached
Open source + managed services
✅ 無料プランあり💡 Pro Tip
両ツールは無料トライアルまたは無料プランを提供しています。有料プランに加入する前に、実際のワークフローで両方をテストすることをお勧めします。
🏆おすすめ
広範な分析とテストの結果、私たちの見解は次のとおりです：RedisとMemcachedはどちらも生産性を大幅に向上させる優れたツールです。最適な選択は、あなたの具体的なニーズ、ワークフロー、優先事項によって異なります。
Choose Redis if:
You need rich data structures, persistence, pub/sub messaging, or want a versatile in-memory data store beyond simple caching.
Choose Memcached if:
You only need simple key-value caching, want lower memory overhead, or need multi-threaded performance for high-throughput caching.
よくある質問
For simple key-value operations, performance is comparable. Memcached can be slightly faster for pure caching due to its multi-threaded architecture, but the difference is negligible for most applications.
最終結論：どちらを選ぶべき？
✨ Redisを選ぶべき場合
You need rich data structures, persistence, pub/sub messaging, or want a versatile in-memory data store beyond simple caching.
✨ Memcachedを選ぶべき場合
You only need simple key-value caching, want lower memory overhead, or need multi-threaded performance for high-throughput caching.