job调用代码
时间: 2023-07-02 07:07:27 浏览: 97
我不确定您指的是哪种类型的job调用代码,因为这会因不同的应用程序和框架而异。但是,以下是一些可能有用的示例:
1. Apache Spark中的job调用代码:
```python
from pyspark import SparkContext, SparkConf
conf = SparkConf().setAppName("MyApp")
sc = SparkContext(conf=conf)
rdd = sc.parallelize([1, 2, 3, 4, 5])
result = rdd.map(lambda x: x * 2).collect()
print(result)
sc.stop()
```
2. Hadoop MapReduce中的job调用代码:
```java
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
public class MyJob {
public static void main(String[] args) throws Exception {
Configuration conf = new Configuration();
Job job = Job.getInstance(conf, "MyJob");
job.setJarByClass(MyJob.class);
job.setMapperClass(MyMapper.class);
job.setReducerClass(MyReducer.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(Text.class);
FileInputFormat.addInputPath(job, new Path(args[0]));
FileOutputFormat.setOutputPath(job, new Path(args[1]));
System.exit(job.waitForCompletion(true) ? 0 : 1);
}
}
```
这是一个Java类,其中`MyMapper`和`MyReducer`是自定义Mapper和Reducer类。要运行此作业,请使用以下命令:
```
hadoop jar MyJob.jar input-path output-path
```
3. TensorFlow中的job调用代码:
```python
import tensorflow as tf
cluster = tf.train.ClusterSpec({
"worker": ["worker1.example.com:2222", "worker2.example.com:2222"],
"ps": ["ps1.example.com:2222"]
})
server = tf.train.Server(cluster, job_name="worker", task_index=0)
with tf.device("/job:ps/task:0"):
weights = tf.Variable(tf.zeros([784, 10]))
with tf.device("/job:worker/task:0"):
x = tf.placeholder(tf.float32, [None, 784])
y = tf.nn.softmax(tf.matmul(x, weights))
# ... define loss and optimizer ...
with tf.Session(server.target) as sess:
# ... run training loop ...
```
这里定义了一个TensorFlow集群,其中有两个工作器和一个参数服务器。`worker`任务负责运行训练代码,而`ps`任务负责存储和同步变量。要运行此作业,请在每个工作器和参数服务器上运行类似以下的命令:
```
python my_job.py --job_name=worker --task_index=0
```
或者
```
python my_job.py --job_name=ps --task_index=0
```
这里`my_job.py`是包含上述代码的Python文件。
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