hadoop怎么访问hdfs路径

Posted 2023-03-20

先用hdfsGetPathInfo 得到一个hdfsFileInfo类型的结构体，
get_real_path(dsh, s, real_path);
hdfsFileInfo * pt_hdfs_file_info = hdfsGetPathInfo(hdfs,real_path);//
这个结构体中有个kind属性，就是来区分是文件还是目录
typedef struct
tObjectKind mKind; /* file or directory */
char *mName; /* the name of the file */
tTime mLastMod; /* the last modification time for the file in seconds */
tOffset mSize; /* the size of the file in bytes */
short mReplication; /* the count of replicas */
tOffset mBlockSize; /* the block size for the file */
char *mOwner; /* the owner of the file */
char *mGroup; /* the group associated with the file */
short mPermissions; /* the permissions associated with the file */
tTime mLastAccess; /* the last access time for the file in seconds */
hdfsFileInfo; 参考技术A

先用hdfsGetPathInfo 得到一个hdfsFileInfo类型的结构体， get_real_path(dsh, s, real_path); 


hdfsFileInfo * pt_hdfs_file_info = hdfsGetPathInfo(hdfs,real_path);// 这个结构体中有个kind属性，就是来区分是文件还是目录 typedef struct

参考技术B 先用hdfsGetPathInfo 得到一个hdfsFileInfo类型的结构体，
get_real_path(dsh, s, real_path);
hdfsFileInfo * pt_hdfs_file_info = hdfsGetPathInfo(hdfs,real_path);//
这个结构体中有个kind属性，就是来区分是文件还是目录
typedef struct
tObjectKind mKind; /* file or directory */
char *mName; /* the name of the file */
tTime mLastMod; /* the last modification time for the file in seconds */
tOffset mSize; /* the size of the file in bytes */
short mReplication; /* the count of replicas */
tOffset mBlockSize; /* the block size for the file */
char *mOwner; /* the owner of the file */
char *mGroup; /* the group associated with the file */
short mPermissions; /* the permissions associated with the file */
tTime mLastAccess; /* the last access time for the file in seconds */
hdfsFileInfo; 参考技术C 此题不适合高质量作答

hdfs怎么查看目录路径

参考技术A 用ls命令， 如果返回一行说明是文件，如果多行则表示目录
hadoop fs -ls $path | grep $path | wc -l