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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>了解Walminer - Walminer</title>
<meta name="description" content="Walminer - 专业的PostgreSQL WAL解析工具，支持数据恢复、审计和故障排查">
<link rel="icon" type="image/jpeg" href="image/logo.jpg">
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</head>
<body>
<div class="grid-bg"></div>
<div class="orb orb-1"></div>
<div class="orb orb-2"></div>
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<nav>
<a href="index.html" class="logo">Walminer</a>
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<a href="about-walminer.html">了解Walminer</a>
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<a href="docs/installation.html">安装部署</a>
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<div class="content">
<div class="page-header">
<h1>了解 <span>Walminer</span></h1>
<p>专业的 PostgreSQL 预写式日志(WAL)解析工具</p>
</div>
<div class="section">
<h2>什么是 Walminer？</h2>
<p>WalMiner是一个PostgreSQL的WAL解码工具，核心功能是从WAL中解码出其包含的SQL以及UNDO SQL。
WalMiner分为开源版本(WalMiner3.0)和闭源版本(WalMiner4.X),WalMiner3.0版本是PostgreSQL插件的形态,
需要在PG中安装插件使用; WalMiner4.X版本是bin工具，无需对数据库产生入侵，即可完成数据找回任务和CDC功能
</p>
<p>
如果您只需要误操作数据找回功能，且可以接受在数据库中安装插件，可以选择WalMiner3.0版本；
如果您需要更强大的功能（如全集簇级别的WAL解析、端到端CDC、生产库故障转移支持等），
或者不希望在生产库中安装插件，建议选择WalMiner4.X版本。
</p>
</div>
<div class="section">
<h2>WalMiner适用范围</h2>
<p>
WalMiner适用于所有PG10+版本的PostgreSQL数据库，包括常见的衍生版本如：</br>
<strong>PolarDB</strong>、<strong>HaloDB</strong>、<strong>IvorySQL</strong>、<strong>openGauss</strong>
、<strong>BabelFish</strong>、<strong>HighGoDB</strong>、<strong>tbase</strong>等。
</p>
<p>
有些数据库使用发布版本的WalMiner即可，有些商业数据库需要使用特定版本，如果您有其他商业数据库的WalMiner需求，
可以联系我们进行定制化兼容。
</p>
</div>
<div class="section">
<h2>核心功能</h2>
<div class="feature-grid">
<div class="feature-item">
<div class="feature-icon">🔍</div>
<h3>WAL 解析为 SQL</h3>
<p>将 WAL 日志解析为可读的 SQL 语句，包括原始 DML/DDL 语句和对应的 UNDO SQL，支持数据恢复、审计和故障排查。</p>
</div>
<div class="feature-item">
<div class="feature-icon">📡</div>
<h3>CDC 解码插件</h3>
<p>解析 REPLICA 级别的 WAL 日志，全集簇级别解码，实现端到端 CDC 功能，支持生产库故障转移自动切换。</p>
</div>
<div class="feature-item">
<div class="feature-icon">📊</div>
<h3>数据字典生成</h3>
<p>从在线数据库快速生成数据字典，支持插件数据类型解析，为 WAL 解析提供元数据支持。</p>
</div>
<div class="feature-item">
<div class="feature-icon">🔎</div>
<h3>WAL 搜索</h3>
<p>在 WAL 中快速定位指定表的所有操作位置，帮助进行故障诊断和数据追踪。</p>
</div>
<div class="feature-item">
<div class="feature-icon">💾</div>
<h3>快速表恢复</h3>
<p>支持从备份集以及备份集后的连续 WAL 中快速恢复特定表，大幅减少 RTO。</p>
</div>
<div class="feature-item">
<div class="feature-icon">🔄</div>
<h3>数据脱库</h3>
<p>数据库无法启动时，可以 dump 出所有数据，最大限度减少数据丢失。</p>
</div>
</div>
</div>
<div class="section">
<h2>应用场景</h2>
<p><strong>数据恢复：</strong>当发生误操作或数据丢失时，可以通过解析 WAL 日志生成 UNDO SQL 进行数据恢复。</p>
<p><strong>审计追踪：</strong>记录所有数据库变更操作，满足合规审计要求，追踪数据变更历史。</p>
<p><strong>故障诊断：</strong>快速定位问题发生的时间和具体操作，帮助排查数据库故障。</p>
<p><strong>CDC 数据同步：</strong>通过解码插件实现变更数据捕获，支持数据实时同步到下游系统。</p>
</div>
<div class="section">
<h2>技术特点</h2>
<p><strong>独立部署：</strong>无需修改数据库配置或安装插件，不影响生产库性能。</p>
<p><strong>全局解析：</strong>支持全集簇级别的 WAL 解析，不受单个数据库限制。</p>
<p><strong>高兼容性：</strong>支持 PostgreSQL 10+ 所有版本，以及多种数据库衍生版本。</p>
<p><strong>故障转移支持：</strong>CDC 模块支持生产库故障转移，自动切换到备库继续解码。</p>
</div>
<div class="section">
<h2>开始使用</h2>
<div class="highlight">
<p>准备好开始了吗？查看我们的 <a href="docs/installation.html" style="color: #a5b4fc;">安装文档</a>，快速上手 Walminer。</p>
</div>
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<p>Walminer - 专业 PostgreSQL WAL 解析工具</p>
<p style="margin-top: 10px; font-size: 0.85rem;">邮箱: lchch1990@sina.cn | QQ群: 811105058 | 微信: L974466845</p>
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