# 查看HDFS应用调测结果
#### 操作场景
HDFS应用程序运行完成后，可直接通过运行结果查看应用程序运行情况，也可以通过HDFS日志获取应用运行情况。
#### 操作步骤
1. **查看运行结果获取应用运行情况**
   - HdfsMain Linux样例程序安全集群运行结果如下所示：
     ```
     [root@node-master1dekG client]# hadoop jar hdfs-examples-1.0.jar com.huawei.bigdata.hdfs.examples.HdfsMain
     WARNING: Use "yarn jar" to launch YARN applications.
     20/03/25 16:29:45 INFO security.UserGroupInformation: Login successful for user hdfsuser using keytab file user.keytab
     20/03/25 16:29:45 INFO security.LoginUtil: Login success!!!!!!!!!!!!!!
     success to create path /user/hdfs-examples
     success to write.
     result is : hi, I am bigdata. It is successful if you can see me.
     success to read.
     success to delete the file /user/hdfs-examples/test.txt
     success to delete path /user/hdfs-examples
     success to create path /user/hdfs-examples
     StoragePolicy:FROZEN
     StoragePolicy:COLD
     StoragePolicy:WARM
     StoragePolicy:HOT
     StoragePolicy:ONE_SSD
     StoragePolicy:ALL_SSD
     StoragePolicy:LAZY_PERSIST
     succeed to set Storage Policy path /user/hdfs-examples
     success to delete path /user/hdfs-examples
     ```
     
   
   - HdfsMain Linux样例程序普通集群运行结果如下所示：
     ```
     [root@node-master2VknR client]# hadoop jar hdfs-examples-1.0.jar com.huawei.bigdata.hdfs.examples.HdfsMain
     WARNING: Use "yarn jar" to launch YARN applications.
     success to create path /user/hdfs-examplessuccess to write.
     result is : hi, I am bigdata. It is successful if you can see me.
     success to read.
     success to delete the file /user/hdfs-examples/test.txt
     success to delete path /user/hdfs-examples
     success to create path /user/hdfs-examples
     StoragePolicy:FROZEN
     StoragePolicy:COLD
     StoragePolicy:WARM
     StoragePolicy:HOT
     StoragePolicy:ONE_SSD
     StoragePolicy:ALL_SSD
     StoragePolicy:LAZY_PERSIST
     succeed to set Storage Policy path /user/hdfs-examples
     success to delete path /user/hdfs-examples
     ```
     
    
2. **查看HDFS日志获取应用运行情况**
   您可以查看HDFS的namenode日志了解应用运行情况，并根据日志信息调整应用程序。