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Paddle Serving Quick Start Examples

(English|简体中文)

This quick start example is mainly for those users who already have a model to deploy, and we also provide a model that can be used for deployment. in case if you want to know how to complete the process from offline training to online service, please refer to the AiStudio tutorial above.

Boston House Price Prediction model

get into the Serving git directory, and change dir to fit_a_line

cd Serving/examples/C++/fit_a_line
sh get_data.sh

Paddle Serving provides HTTP and RPC based service for users to access

RPC service

A user can also start a RPC service with paddle_serving_server.serve. RPC service is usually faster than HTTP service, although a user needs to do some coding based on Paddle Serving's python client API. Note that we do not specify --name here.

python3 -m paddle_serving_server.serve --model uci_housing_model --thread 10 --port 9292

For a complete list of parameters, see the document Serving Configuration

# A user can visit rpc service through paddle_serving_client API
from paddle_serving_client import Client
import numpy as np
client = Client()
client.load_client_config("uci_housing_client/serving_client_conf.prototxt")
client.connect(["127.0.0.1:9292"])
data = [0.0137, -0.1136, 0.2553, -0.0692, 0.0582, -0.0727,
        -0.1583, -0.0584, 0.6283, 0.4919, 0.1856, 0.0795, -0.0332]
fetch_map = client.predict(feed={"x": np.array(data).reshape(1,13,1)}, fetch=["price"])
print(fetch_map)

Here, client.predict function has two arguments. feed is a python dict with model input variable alias name and values. fetch assigns the prediction variables to be returned from servers. In the example, the name of "x" and "price" are assigned when the servable model is saved during training.

WEB service

Users can also put the data format processing logic on the server side, so that they can directly use curl to access the service, refer to the following case whose path is Serving/examples/C++/fit_a_line

python3 -m paddle_serving_server.serve --model uci_housing_model --thread 10 --port 9292

for client side,

curl -H "Content-Type:application/json" -X POST -d '{"feed":[{"x": [0.0137, -0.1136, 0.2553, -0.0692, 0.0582, -0.0727, -0.1583, -0.0584, 0.6283, 0.4919, 0.1856, 0.0795, -0.0332]}], "fetch":["price"]}' http://127.0.0.1:9292/uci/prediction

the response is

{"result":{"price":[[18.901151657104492]]}}

Pipeline Service

Paddle Serving provides industry-leading multi-model tandem services, which strongly supports the actual operating business scenarios of major companies, please refer to OCR word recognition.

we get two models

python3 -m paddle_serving_app.package --get_model ocr_rec
tar -xzvf ocr_rec.tar.gz
python3 -m paddle_serving_app.package --get_model ocr_det
tar -xzvf ocr_det.tar.gz

then we start server side, launch two models as one standalone web service

python3 web_service.py

http request

python3 pipeline_http_client.py

grpc request

python3 pipeline_rpc_client.py

output

{'err_no': 0, 'err_msg': '', 'key': ['res'], 'value': ["['土地整治与土壤修复研究中心', '华南农业大学1素图']"]}

Stop Serving/Pipeline service

Method one ：Ctrl+C to quit

Method Two ：In the path where starting the Serving/Pipeline service or the path which environment variable SERVING_HOME set (the file named ProcessInfo.json exists in this path)

python3 -m paddle_serving_server.serve stop