如果在將非同步呼叫整合進測試時遇到 `RuntimeError: Task attached to a different loop`（例如使用 [MongoDB 的 MotorClient](https://stackoverflow.com/questions/41584243/runtimeerror-task-attached-to-a-different-loop) 時），請記得：需要事件迴圈的物件只應在非同步函式內實例化，例如在 `@app.on_event("startup")` 回呼中。

### Create Database Tables on Startup { #create-database-tables-on-startup }

We will create the database tables when the application starts.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[32:37] hl[35:37] *}

Here we create the tables on an application startup event.

For production you would probably use a migration script that runs before you start your app. 🤓

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#!/bin/sh
#
# fess <summary>
#
# chkconfig:   2345 80 20
# description: Starts and stops a single fess instance on this system 
#

### BEGIN INIT INFO
# Provides: Fess
# Required-Start: $network $named
# Required-Stop: $network $named
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: This service manages the fess daemon

            this.flags = flags;
            this.timestamp = System.currentTimeMillis();
        }
    }

    /**
     * Start the mock witness service
     *
     * @throws IOException if service startup fails
     */
    public void start() throws IOException {
        serverSocket = new ServerSocket(0); // Use any available port
        running.set(true);

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if /i %SERVICE_CMD% == start goto doStart
if /i %SERVICE_CMD% == stop goto doStop
if /i %SERVICE_CMD% == manager goto doManagment
echo Unknown option "%SERVICE_CMD%"

:displayUsage
echo.
echo Usage: service.bat install^|remove^|start^|stop^|manager [SERVICE_ID]
goto:eof

:doStart
"%EXECUTABLE%" //ES//%SERVICE_ID% %LOG_OPTS%
if not errorlevel 1 goto started
echo Failed starting '%SERVICE_ID%' service

set FESS_MAX_MEM=%FESS_HEAP_SIZE%
)

REM min and max heap sizes should be set to the same value to avoid
REM stop-the-world GC pauses during resize, and so that we can lock the
REM heap in memory on startup to prevent any of it from being swapped
REM out.
set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Xms%FESS_MIN_MEM% -Xmx%FESS_MAX_MEM%
set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -XX:MaxMetaspaceSize=256m -XX:CompressedClassSpaceSize=32m

- This field is optional for distributed deployments. If you don't set this field in a federated setup, we use the IP addresses of
hosts passed to the MinIO server startup and use them for DNS entries.

### Run Multiple Clusters

> cluster1

```sh
export MINIO_ETCD_ENDPOINTS="http://remote-etcd1:2379,http://remote-etcd2:4001"
export MINIO_DOMAIN=domain.com

     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Started server process <b>[</b><font color="#34E2E2"><b>383153</b></font><b>]</b>
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Waiting for application startup.