Cette sous‑application est simplement une autre application FastAPI standard, mais c'est celle qui sera « montée » :

{* ../../docs_src/sub_applications/tutorial001_py310.py hl[11, 14:16] *}

### Monter la sous-application { #mount-the-sub-application }

Dans votre application de premier niveau, `app`, montez la sous‑application, `subapi`.

Dans ce cas, elle sera montée au chemin `/subapi` :

```
rm -rf /tmp/etcd-data.tmp && mkdir -p /tmp/etcd-data.tmp && \
  podman rmi gcr.io/etcd-development/etcd:v3.3.9 || true && \
  podman run \
  -p 2379:2379 \
  -p 2380:2380 \
  --mount type=bind,source=/tmp/etcd-data.tmp,destination=/etcd-data \
  --name etcd-gcr-v3.3.9 \
  gcr.io/etcd-development/etcd:v3.3.9 \
  /usr/local/bin/etcd \
  --name s1 \
  --data-dir /etcd-data \

		if osErrToFileErr(err) == errFileNotFound {
			return nil
		}
		if !osIsPermission(err) {
			return osErrToFileErr(err)
		}
		// There may be permission error when dirPath
		// is at the root of the disk mount that may
		// not have the permissions to avoid 'noatime'
		fd, err = openFileWithFD(dirPath, os.O_RDONLY, 0o666)
		if err != nil {
			if osErrToFileErr(err) == errFileNotFound {
				return nil
			}

  static final int DEFAULT_SIZE = 3;

  /**
   * Minimum size of the hash table of a compact hash-based collection. Because small hash tables
   * use a byte[], any smaller size uses the same amount of memory due to object padding.
   */
  private static final int MIN_HASH_TABLE_SIZE = 4;

  private static final int BYTE_MAX_SIZE = 1 << Byte.SIZE; // 2^8 = 256

## Connection Pool

A primary responsibility for any HTTP client is to efficiently manage network connections. Creating and establishing new connections require a fair amount of overhead and added latency. OkHttp will make every effort to reuse existing connections to avoid this overhead and added latency.

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次に、サブアプリケーションとその path operation を作成します。

このサブアプリケーションは通常の FastAPI アプリケーションですが、これを「マウント」します:

{* ../../docs_src/sub_applications/tutorial001_py310.py hl[11, 14:16] *}

### サブアプリケーションをマウント { #mount-the-sub-application }

トップレベルのアプリケーション `app` に、サブアプリケーション `subapi` をマウントします。

この例では、パス `/subapi` にマウントされます:

{* ../../docs_src/sub_applications/tutorial001_py310.py hl[11, 19] *}

**Not**: Bu oldukça teknik bir detay; büyük ihtimalle **direkt geçebilirsiniz**.

---

`APIRouter`’lar "mount" edilmez; uygulamanın geri kalanından izole değildir.

Çünkü *path operation*’larını OpenAPI şemasına ve kullanıcı arayüzlerine dahil etmek istiyoruz.

Onları tamamen izole edip bağımsız şekilde "mount" edemediğimiz için, *path operation*’lar doğrudan eklenmek yerine "klonlanır" (yeniden oluşturulur).

///

      return doGetRate();
    }
  }

  abstract double doGetRate();

  /**
   * Acquires a single permit from this {@code RateLimiter}, blocking until the request can be
   * granted. Tells the amount of time slept, if any.
   *
   * <p>This method is equivalent to {@code acquire(1)}.
   *
   * @return time spent sleeping to enforce rate, in seconds; 0.0 if not rate-limited

as needed.  When you restart, it is immediate and non-disruptive to the applications. Each group of servers in the command-line is called a pool. There are 2 server pools in this example. New objects are placed in server pools in proportion to the amount of free space in each pool. Within each pool, the location of the erasure-set of drives is determined based on a deterministic hashing algorithm.

> **NOTE:** **Each pool you add must have the same erasure coding parity configuration as the...