# デプロイメントのコンセプト { #deployments-concepts }

**FastAPI**を用いたアプリケーションをデプロイするとき、もしくはどのようなタイプのWeb APIであっても、おそらく気になるコンセプトがいくつかあります。

それらを活用することでアプリケーションを**デプロイするための最適な方法**を見つけることができます。

重要なコンセプトのいくつかを紹介します:

* セキュリティ - HTTPS
* 起動時の実行
* 再起動
* レプリケーション（実行中のプロセス数）
* メモリ
* 開始前の事前のステップ

これらが**デプロイメント**にどのような影響を与えるかを見ていきましょう。

最終的な目的は、**安全な方法で**APIクライアントに**サービスを提供**し、**中断を回避**するだけでなく、**計算リソース**（例えばリモートサーバー/仮想マシン）を可能な限り効率的に使用することです。 🚀

## Concepts

- All Buckets on MinIO are always in one of the following states: unversioned (the default) and all other existing deployments, versioning-enabled, or versioning-suspended.

Production’da bu paralelliği nasıl sağlayacağınızı görmek için [Deployment](deployment/index.md) bölümüne bakın.

## `async` ve `await` { #async-and-await }

/**
 * Manager class for chat sessions.
 * Sessions are stored in memory with automatic expiration.
 *
 * <p><b>Note:</b> Sessions are stored in a local in-memory ConcurrentHashMap.
 * In multi-instance deployments (e.g., behind a load balancer), sessions are
 * not shared between instances. Use sticky sessions or an external session
 * store if session affinity across instances is required.</p>
 *
 * @author FessProject
 */

然后它只需返回一个包含这些值的 `dict`。

/// info | 信息

FastAPI 在 0.95.0 版本中新增了对 `Annotated` 的支持（并开始推荐使用）。

如果你的版本较旧，尝试使用 `Annotated` 会报错。

在使用 `Annotated` 之前，请确保[升级 FastAPI 版本](../../deployment/versions.md#upgrading-the-fastapi-versions)到至少 0.95.1。

///

### 导入 `Depends` { #import-depends }

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[3] *}

FastAPI passou a suportar a notação `Annotated` (e começou a recomendá-la) na versão 0.95.0.

Se você utiliza uma versão anterior, ocorrerão erros ao tentar utilizar `Annotated`.

Certifique-se de [Atualizar a versão do FastAPI](../../deployment/versions.md#upgrading-the-fastapi-versions) para pelo menos 0.95.1 antes de usar `Annotated`.

///

### Importando `Depends` { #import-depends }

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[3] *}

  <interactiveMode>true</interactiveMode>
  -->

  <!-- offline
   | Determines whether maven should attempt to connect to the network when executing a build.
   | This will have an effect on artifact downloads, artifact deployment, and others.
   |
   | Default: false
  <offline>false</offline>
  -->

  <!-- pluginGroups
   | This is a list of additional group identifiers that will be searched when resolving plugins by their prefix, i.e.

The main web server to run **FastAPI** applications.

You can also use the `--workers` command line option to have an asynchronous multi-process server.

Check more details in the [Deployment](deployment/index.md) section.

///

## Benchmarks and speed { #benchmarks-and-speed }

FastAPI added support for `Annotated` (and started recommending it) in version 0.95.0.

If you have an older version, you would get errors when trying to use `Annotated`.

Make sure you [Upgrade the FastAPI version](../../deployment/versions.md#upgrading-the-fastapi-versions) to at least 0.95.1 before using `Annotated`.

///

### Import `Depends` { #import-depends }

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[3] *}

```

</div>

////

这里唯一的新选项是 `--workers` 告诉 Uvicorn 启动 4 个工作进程。

您还可以看到它显示了每个进程的 **PID**，父进程（这是**进程管理器**）的 PID 为`27365`，每个工作进程的 PID 为：`27368`、`27369`， `27370`和`27367`。

## 部署概念 { #deployment-concepts }

在这里，您学习了如何使用多个**工作进程（workers）**来让应用程序的执行**并行化**，充分利用 CPU 的**多核性能**，并能够处理**更多的请求**。

从上面的部署概念列表来看，使用worker主要有助于**复制**部分，并对**重新启动**有一点帮助，但您仍然需要照顾其他部分：

* **安全 - HTTPS**
* **启动时运行**
* ***重新启动***