# Backend Cache

> 缓存策略 - Redis/Memcached/本地缓存

- **Type:** Skill
- **Install:** `agentstack add skill-awesome-ai-dev-awesome-ai-dev-cache`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [awesome-ai-dev](https://agentstack.voostack.com/s/awesome-ai-dev)
- **Installs:** 0
- **Category:** [Databases](https://agentstack.voostack.com/c/databases)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [awesome-ai-dev](https://github.com/awesome-ai-dev)
- **Source:** https://github.com/awesome-ai-dev/awesome-ai-dev/tree/main/.cursor/skills/backend/cache

## Install

```sh
agentstack add skill-awesome-ai-dev-awesome-ai-dev-cache
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# 缓存策略

## Redis

### 基础操作

```typescript
import Redis from 'ioredis';

const redis = new Redis();

// 字符串
await redis.set('key', 'value');
const value = await redis.get('key');

// 哈希
await redis.hset('user:1', 'name', 'John');
const user = await redis.hgetall('user:1');

// 列表
await redis.rpush('queue', 'item1');
const item = await redis.lpop('queue');

// 过期
await redis.setex('token', 3600, 'abc'); // 1小时过期
```

### 缓存模式

```typescript
// Cache-Aside
async function getUser(id: string) {
  const cacheKey = `user:${id}`;
  const cached = await redis.get(cacheKey);
  if (cached) return JSON.parse(cached);
  
  const user = await db.user.findById(id);
  await redis.setex(cacheKey, 3600, JSON.stringify(user));
  return user;
}

// Write-Through
async function updateUser(id: string, data: User) {
  await db.user.update(id, data);
  await redis.setex(`user:${id}`, 3600, JSON.stringify(data));
}
```

## 缓存策略详解

| 策略 | 适用场景 |
| --- | --- |
| Cache-Aside | 读多写少 |
| Write-Through | 数据一致性要求高 |
| Write-Behind | 写入性能要求高 |
| TTL | 过期数据 |

## 分布式锁

```typescript
async function withLock(key: string, fn: () => Promise) {
  const lock = await redis.set(key, '1', 'EX', 10, 'NX');
  if (!lock) throw new Error('Lock failed');
  
  try {
    return await fn();
  } finally {
    await redis.del(key);
  }
}
```

## 最佳实践

1. 合理设置 TTL
2. 缓存穿透防护
3. 缓存雪崩处理
4. 热点数据预热

## 参考

- `.cursor/rules/nestjs.mdc`

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [awesome-ai-dev](https://github.com/awesome-ai-dev)
- **Source:** [awesome-ai-dev/awesome-ai-dev](https://github.com/awesome-ai-dev/awesome-ai-dev)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-awesome-ai-dev-awesome-ai-dev-cache
- Seller: https://agentstack.voostack.com/s/awesome-ai-dev
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.