## Replikation – Prozesse und Arbeitsspeicher { #replication-processes-and-memory }

Wenn Sie eine FastAPI-Anwendung verwenden und ein Serverprogramm wie den `fastapi`-Befehl, der Uvicorn ausführt, kann **ein einzelner Prozess** an mehrere Clients gleichzeitig ausliefern.

In vielen Fällen möchten Sie jedoch mehrere Workerprozesse gleichzeitig ausführen.

### Mehrere Prozesse – Worker { #multiple-processes-workers }

 * </ul>
 *
 * <p>The main components are:</p>
 * <ul>
 *   <li>{@link org.apache.maven.api.cli.Invoker} - Base interface for executing Maven tools</li>
 *   <li>{@link org.apache.maven.api.cli.Parser} - Processes command-line arguments into invoker requests</li>
 *   <li>{@link org.apache.maven.api.cli.Options} - Represents Maven configuration options</li>

     *
     * @param context the Tomcat context for this web resource root
     */
    public FessWebResourceRoot(final Context context) {
        super(context);
    }

    /**
     * Processes WEB-INF/lib directory and additionally scans WEB-INF/plugin for Fess plugins.
     * This method extends the standard processing to include plugin JAR files that contain
     * the "Fess-WebAppJar" manifest attribute.
     *

    }

    /**
     * Reads and processes index settings from configuration file.
     *
     * @param fesenType          the search engine type
     * @param indexConfigFile    the path to the index configuration file
     * @param numberOfShards     the number of primary shards
     * @param autoExpandReplicas the auto expand replicas setting
     * @return the processed index settings JSON
     */

import org.opensearch.index.query.QueryBuilders;
import org.opensearch.index.query.RangeQueryBuilder;

/**
 * Command class for handling term range query execution and conversion.
 * This class processes Lucene TermRangeQuery objects and converts them to OpenSearch QueryBuilder instances.
 */
public class TermRangeQueryCommand extends QueryCommand {

import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

/**
 * Filter for handling Cross-Origin Resource Sharing (CORS) requests.
 * Processes CORS headers and handles preflight OPTIONS requests.
 */
public class CorsFilter implements Filter {

    /**
     * Creates a new instance of CorsFilter.
     */
    public CorsFilter() {

        } catch (final Exception e) {
            throw new SuggesterException("Failed to execute request: " + getClass().getSimpleName(), e);
        }
        return deferred.promise();
    }

    /**
     * Processes the request.
     * @param client The OpenSearch client.
     * @param deferred The Deferred object to resolve or reject the response.
     */
    protected abstract void processRequest(Client client, Deferred<T> deferred);

### 여러 프로세스 - 예시 { #multiple-processes-an-example }

이 예시에서는 **Manager Process**가 두 개의 **Worker Processes**를 시작하고 제어합니다.

이 Manager Process는 아마 IP의 **포트**에서 리스닝하는 역할을 합니다. 그리고 모든 통신을 워커 프로세스로 전달합니다.

워커 프로세스들이 실제로 애플리케이션을 실행하며, **요청**을 받아 **응답**을 반환하는 주요 연산을 수행하고, RAM에 변수로 로드한 모든 내용을 담습니다.

<img src="/img/deployment/concepts/process-ram.drawio.svg">

                } else {
                    logger.warn(message, e);
                }
            }
            response.sendError(statusCode, message);
        }
    }

    /**
     * Processes API requests to the search engine.
     * Handles both regular API calls and plugin requests.
     *
     * @param request  the HTTP servlet request
     * @param response the HTTP servlet response

        }

        /**
         * Executes the crawling thread.
         * Sets the running flag, processes the data store, and ensures
         * proper cleanup regardless of success or failure.
         */
        @Override
        public void run() {
            running = true;
            try {
                process();
            } finally {
                running = false;
                finished = true;