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Qdrant 向量数据库安装与入门指南

Qdrant 向量数据库安装与入门指南

🚀 Qdrant 向量数据库安装与入门指南

本文整理自 Qdrant 官方文档,带你从零开始认识并安装这款当红的向量数据库


📌 写在前面

在 AI 大模型爆发的今天,向量数据库已经成为了 RAG(检索增强生成)、智能推荐、语义搜索等场景的核心基础设施。而 Qdrant 凭借其优秀的性能和友好的 API,正在成为众多开发者的首选。

这篇文章将带你从基础概念开始,一步步完成 Qdrant 的安装和配置~


🤔 什么是向量数据库?

向量数据库是一种专门为处理 AI 模型生成的高维向量数据而设计的数据库。

传统的关系型数据库(MySQL、PostgreSQL 等)存储的是结构化的表格数据,而向量数据库存储的是:

  • 🎯 向量数据:AI 模型生成的 embedding(嵌入向量)
  • 🏷️ ID:每个向量的唯一标识
  • 📦 Payload:附加的元数据信息(可以理解为"备注")

这些数据共同组成了 Qdrant 中的"集合"(Collection)。


💡 为什么需要向量数据库?

想象一下这些场景:

  • 图像识别:每张图片被转换成一个包含成千上万个数值的向量,每个数值代表图片的某个特征
  • 音乐推荐:每首歌被表示为一个向量,元素包含节奏、流派、歌词情感等信息
  • 语义搜索:每篇文章、每个问题都被向量化,用来计算"意思相近"的程度

向量数据库就是专门为高效处理这类数据而生的!它使用:

  • HNSW 索引:分层可导航小世界算法,实现毫秒级的近似最近邻搜索
  • 乘积量化:压缩向量体积,节省存储空间

📐 Qdrant 支持的三种距离度量

1️⃣ 余弦相似度 📐

衡量两个向量"方向"是否一致,值范围从 -1 到 1。

  • 1 = 完全相同
  • 0 = 不相关
  • -1 = 完全相反

💡 最常用于文本相似度比较!

2️⃣ 点积 🎯

和余弦相似度类似,但还考虑了向量的"长度"。 如果向量已经归一化(长度为 1),点积就等于余弦相似度。

💡 适合基于词频构建的向量表示!

3️⃣ 欧氏距离 📏

就是我们中学学过的"空间两点之间的直线距离"。 计算两个向量对应位置差值的平方和,再开平方。

💡 直观易懂,广泛应用于各类机器学习场景!


🎯 什么是 Qdrant?

Qdrant 是一款开源的向量相似度搜索引擎,它提供:

  • ✅ 生产级服务:稳定可靠,可直接用于线上环境
  • ✅ 友好的 API:REST API + gRPC 双支持
  • ✅ Payload 支持:每个向量都可以附带额外信息
  • ✅ 多语言客户端:Python、JavaScript、Rust、Go 等
  • ✅ 三种部署方式
    • 本地 Docker 部署
    • Python 客户端直连
    • Qdrant Cloud(有免费额度!)

⚙️ Qdrant 安装教程

🐳 Docker 安装(推荐)

Qdrant 官方最推荐的部署方式就是 Docker,一键启动,无需复杂配置!

💡 小提示:通常建议把软件安装到 /opt 目录下


⚠️ 国内用户注意:镜像拉取问题

直接从 Docker Hub 拉取 Qdrant 镜像可能会非常慢,甚至失败:

别担心,配置一下国内镜像源就能解决!


🔧 配置 Docker 国内镜像源

步骤 1:编辑(或创建)配置文件

vim /etc/docker/daemon.json

步骤 2:添加镜像配置

{
"registry-mirrors": [
"https://docker.m.daocloud.io"
  ]
}

步骤 3:重启 Docker 服务

systemctl daemon-reload
systemctl restart docker

📋 可用的 Docker 镜像源列表

镜像仓库地址
docker.m.daocloud.io
ccr.ccs.tencentyun.com
docker.1ms.run
hub.xdark.top
dhub.kubesre.xyz
docker.kejilion.pro
docker.xuanyuan.me
docker.hlmirror.com
run-docker.cn
docker.sunzishaokao.com
image.cloudlayer.icu
docker-0.unsee.tech
docker.tbedu.top
hub.crdz.gq
docker.melikeme.cn

配置完成后,再次拉取镜像就非常顺畅啦!


▶️ 启动 Qdrant

执行以下命令一键启动:

docker run -p 6333:6333 -p 6334:6334 \
    -v "$(pwd)/qdrant_storage:/qdrant/storage:z" \
    qdrant/qdrant

参数说明:

  • 6333 端口:REST API 和 Web UI
  • 6334 端口:gRPC API
  • 数据卷挂载:将数据持久化到本地目录

启动成功后,你会看到类似这样的日志:


🌐 访问地址

启动成功后,可以通过以下地址访问:

服务
地址
REST API
http://你的IP:6333
Web UI 控制台
http://你的IP:6333/dashboard
gRPC API
http://你的IP:6334

打开 Web UI,你会看到这个欢迎页面:


🎉 恭喜!

Qdrant 已经成功安装并运行了!接下来你可以:

  1. 创建你的第一个 Collection
  2. 导入向量数据
  3. 开始你的语义搜索之旅

💡 提示:官方文档有非常详细的快速入门教程,建议继续阅读哦~

基本 文件 流程 错误 SQL 调试
  1. 请求信息 : 2026-06-28 17:40:39 HTTP/1.1 GET : https://www.yeyulingfeng.com/a/812274.html
  2. 运行时间 : 0.232302s [ 吞吐率:4.30req/s ] 内存消耗:4,624.22kb 文件加载:145
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=a7508d6a816067d95c699859ed69af8a
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  1. CONNECT:[ UseTime:0.001371s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.002178s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000786s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000734s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001690s ]
  6. SELECT * FROM `set` [ RunTime:0.000598s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001833s ]
  8. SELECT * FROM `article` WHERE `id` = 812274 LIMIT 1 [ RunTime:0.001248s ]
  9. UPDATE `article` SET `lasttime` = 1782639639 WHERE `id` = 812274 [ RunTime:0.012215s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000769s ]
  11. SELECT * FROM `article` WHERE `id` < 812274 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001278s ]
  12. SELECT * FROM `article` WHERE `id` > 812274 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001268s ]
  13. SELECT * FROM `article` WHERE `id` < 812274 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002655s ]
  14. SELECT * FROM `article` WHERE `id` < 812274 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002581s ]
  15. SELECT * FROM `article` WHERE `id` < 812274 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007047s ]
0.236276s