{
  "slug": "cache-three-problems",
  "name": "缓存穿透 / 击穿 / 雪崩",
  "description": "缓存的三大经典问题：缓存穿透、缓存击穿、缓存雪崩的定义、区别与优化方案",
  "tags": [
    "Redis高可用",
    "SETNX",
    "TTL加随机",
    "互斥锁",
    "参数校验",
    "多级缓存",
    "布隆过滤器",
    "热点key",
    "缓存击穿",
    "缓存空对象",
    "缓存穿透",
    "缓存雪崩",
    "逻辑过期"
  ],
  "difficulty_range": [
    1,
    5
  ],
  "schema_version": "1.0.0",
  "updated": "2026-09-05",
  "question_files": [
    "single_choice",
    "fill_blank",
    "short_answer",
    "code_reading"
  ],
  "stats": {
    "total": 35,
    "by_type": {
      "single_choice": 10,
      "fill_blank": 10,
      "short_answer": 10,
      "code_reading": 5
    }
  }
}