HDFSClient¶
一个HADOOP文件系统工具类。
- 参数:
-
hadoop_home (str):HADOOP HOME地址。
configs (dict): HADOOP文件系统配置。需包含 fs.default.name 和 hadoop.job.ugi 这两个字段。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
client.ls_dir("hdfs:/test_hdfs_client")
- ls_dir ( fs_path ) ¶
列出 fs_path 路径下所有的文件和子目录。
- 参数:
-
fs_path (str): HADOOP文件路径。
- 返回:
-
Tuple, 一个包含所有子目录和文件名的2-Tuple,格式形如: ([subdirname1, subdirname1, ...], [filename1, filename2, ...])。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
subdirs, files = client.ls_dir("hdfs:/test_hdfs_client")
- mkdirs ( fs_path ) ¶
创建一个目录。
- 参数:
-
fs_path (str): HADOOP文件路径。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
client.mkdirs("hdfs:/test_hdfs_client")
- delete ( fs_path ) ¶
删除HADOOP文件(或目录)。
- 参数:
-
fs_path (str): HADOOP文件路径。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
client.delete("hdfs:/test_hdfs_client")
- is_file ( fs_path ) ¶
判断当前路径是否是一个文件。
- 参数:
-
fs_path (str): HADOOP文件路径。
- 返回:
-
Bool:若当前路径存在且是一个文件,返回 True ,反之则返回 False 。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
ret = client.is_file("hdfs:/test_hdfs_client")
- is_dir ( fs_path ) ¶
判断当前路径是否是一个目录。
- 参数:
-
fs_path (str): HADOOP文件路径。
- 返回:
-
Bool:若当前路径存在且是一个目录,返回 True ,反之则返回 False 。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
ret = client.is_file("hdfs:/test_hdfs_client")
- is_exist ( fs_path ) ¶
判断当前路径是否存在。
- 参数:
-
fs_path (str): HADOOP文件路径。
- 返回:
-
Bool:若当前路径存在返回 True ,反之则返回 False 。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
ret = client.is_exist("hdfs:/test_hdfs_client")
- upload ( local_path, fs_path ) ¶
上传本地文件至HADOOP文件系统。
- 参数:
-
local_path (str): 本地文件路径。
fs_path (str): HADOOP文件路径。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
client.upload("test_hdfs_client", "hdfs:/test_hdfs_client")
- download ( fs_path, local_path ) ¶
下载HADOOP文件至本地文件系统。
- 参数:
-
local_path (str): 本地文件路径。
fs_path (str): HADOOP文件路径。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
client.download("hdfs:/test_hdfs_client", "./")
- touch ( fs_path, exist_ok=True ) ¶
创建一个HADOOP文件。
- 参数:
-
fs_path (str): HADOOP文件路径。
exist_ok (bool): 路径已存在时程序是否报错。若 exist_ok = True,则直接返回,反之则抛出文件存在的异常,默认不抛出异常。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
client.touch("hdfs:/test_hdfs_client")
- mv ( fs_src_path, fs_dst_path, overwrite=False ) ¶
HADOOP系统文件移动。
- 参数:
-
fs_src_path (str): 移动前源文件路径名。
fs_dst_path (str): 移动后目标文件路径名。
overwrite (bool): 若目标文件已存在,是否删除进行重写,默认不重写并抛出异常。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
client.mv("hdfs:/test_hdfs_client", "hdfs:/test_hdfs_client2")
- list_dirs ( fs_path ) ¶
列出HADOOP文件路径下所有的子目录。
- 参数:
-
fs_path (str): HADOOP文件路径。
- 返回:
-
List: 该路径下所有的子目录名。
示例代码:
from paddle.distributed.fleet.utils import HDFSClient
hadoop_home = "/home/client/hadoop-client/hadoop/"
configs = {
"fs.default.name": "hdfs://xxx.hadoop.com:54310",
"hadoop.job.ugi": "hello,hello123"
}
client = HDFSClient(hadoop_home, configs)
subdirs = client.list_dirs("hdfs:/test_hdfs_client")