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更换产品内置缓存数据库

功能概述

系统有一个内置的缓存数据库，负责存储系统中的缓存数据，包括缓存数据集以及抽取模型的数据抽取。

随着用户对数据处理（分析）能力的要求越来越高，有时不能满足需求，此时就需要更换内置的缓存数据库至其他数据库，比如ClickHouse上。

根据数据分析规模我们给出建议：

中等规模，即个人使用、中小型公司或对数据分析要求不高的场景。推荐使用内置的数据库，无需做任何处理。
大型规模。用户需要安装 ClickHouse 服务器并按照本页提供的方法切换内置数据库，之后会将数据集/模型缓存存储到 ClickHouse 中，并对其执行分析查询。

操作说明

我们以更换到 ClickHouse为例进行讲解。

1. 修改 Wyn.conf 配置文件。

标准版，Windows环境中配置文件的默认路径为 C:\Program Files\Wyn\conf ，Linux环境下为 /opt/Wyn/conf/

集群版，Windows环境中配置文件的默认路径为 C:\Program Files\Wyn\Monitor\conf ，Linux环境下为 /opt/Wyn/Monitor/conf/

注意
如您使用了分布式部署方案，则在 Server 模块所在的计算机中修改配置文件。
请将Wyn.conf文件备份后再进行修改操作，以备修改过程中对比内容或恢复文件时使用。
如需在原路径下进行修改，请使用管理员权限打开Wyn.conf文件。

在配置文件的 GlobalSettings 节点中添加 ClickHouse 数据库的相关信息。

示例：

<DataWarehouse>      
<Provider>ClickHouseV2</Provider>      
<ConnectionString>Host=myServerAddress;Port=myServerPort;Username=myUsername;Password=myPassword;Database=myDatabase;</ConnectionString>    
</DataWarehouse>

注意
<Provider></Provider>标记对中间必须使用“ClickHouseV2”。

2. 重启WynService。

修改完成后，将Wyn.conf文件保存到原路径，重启WynService服务。

3. 手动刷新已有缓存。

更换内置缓存数据库之后可以返现数据集缓存以及数据模型缓存是不可用以及失效状态，此时需手动刷新和重建缓存。

之后可见缓存恢复正常，之后系统就会将数据集/模型缓存存储到 ClickHouse 中，并对其执行分析查询。