如何在 Rocky Linux 9 上安装 Memcached

Memcached是一个高性能的分布式内存缓存系统。它旨在通过在内存中缓存数据来加速 Web 应用程序，从而减少应用程序必须从较慢的数据存储（如数据库）中检索数据的次数。您可以在基于PHP的应用程序（包括WordPress和Joomla）中使用Memcached，以平稳运行而不会产生太多延迟。如何在 Rocky Linux 9 上安装 Memcached

在 Rocky Linux 9 上安装 Memcached

第 1 步。第一步是将系统更新到最新版本的软件包列表。为此，请运行以下命令：

<span class="pln">sudo dnf check</span><span class="pun">-</span><span class="pln">update
sudo dnf install dnf</span><span class="pun">-</span><span class="pln">utils</span>

第 2 步。在 Rocky Linux 9 上安装 Memcached。

默认情况下，Memcached 在 Rocky Linux 9 AppStream 存储库中可用。现在运行以下命令，在 Rocky Linux 系统上安装最新版本的 Memcached：

<span class="pln">sudo dnf install memcached libmemcached</span>

现在，使用以下命令启动并启用 Memcached 服务：

<span class="pln">sudo systemctl enable memcached </span><span class="pun">--</span><span class="pln">now
sudo systemctl status memcached</span>

让我们检查一下版本：

<span class="pln">memcached </span><span class="pun">--</span><span class="pln">version</span>

第 3 步。配置内存缓存。

您可以通过编辑配置文件来配置 Memcached。您可以调整设置，例如用于缓存的内存量和并发连接数。例如：/etc/sysconfig/memcached

<span class="pln">nano </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">sysconfig</span><span class="pun">/</span><span class="pln">memcached</span>

默认配置如下所示。您可以根据需要进行更改：

<span class="pln">PORT</span><span class="pun">=</span><span class="str">"11211"</span><span class="pln">
USER</span><span class="pun">=</span><span class="str">"memcached"</span><span class="pln">
MAXCONN</span><span class="pun">=</span><span class="str">"1024"</span><span class="pln">
CACHESIZE</span><span class="pun">=</span><span class="str">"64"</span><span class="pln">
OPTIONS</span><span class="pun">=</span><span class="str">"-l 127.0.0.1,::1"</span>

保存并关闭文件，然后重新启动 Memcached 服务以应用更改：

<span class="pln">sudo systemctl restart memcached</span>

第 4 步。配置防火墙。

如果您在 Rocky Linux 系统上使用 firewalld，则需要允许端口 11211 和 80 通过 firewalld。您可以通过运行以下命令来允许它们：

<span class="pln">sudo firewall</span><span class="pun">-</span><span class="pln">cmd </span><span class="pun">--</span><span class="kwd">add</span><span class="pun">-</span><span class="pln">port</span><span class="pun">=</span><span class="lit">11211</span><span class="pun">/</span><span class="pln">tcp </span><span class="pun">--</span><span class="pln">zone</span><span class="pun">=</span><span class="kwd">public</span> <span class="pun">--</span><span class="pln">permanent
sudo firewall</span><span class="pun">-</span><span class="pln">cmd </span><span class="pun">--</span><span class="kwd">add</span><span class="pun">-</span><span class="pln">port</span><span class="pun">=</span><span class="lit">80</span><span class="pun">/</span><span class="pln">tcp </span><span class="pun">--</span><span class="pln">zone</span><span class="pun">=</span><span class="kwd">public</span> <span class="pun">--</span><span class="pln">permanent
sudo firewall</span><span class="pun">-</span><span class="pln">cmd </span><span class="pun">--</span><span class="pln">reload</span>

现在，您可以使用以下命令列出所有防火墙端口：

<span class="pln">firewall</span><span class="pun">-</span><span class="pln">cmd </span><span class="pun">--</span><span class="pln">list</span><span class="pun">-</span><span class="pln">ports</span>