Question

查看hdfs各目录分别占用多少空间

Answer 1

[hadoop@slave3 java]$ hadoop fs -help
Usage: hadoop fs [generic options]
[-appendToFile <localsrc> ... <dst>]
[-cat [-ignoreCrc] <src> ...]
[-checksum <src> ...]
[-chgrp [-R] GROUP PATH...]
[-chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH...]
[-chown [-R] [OWNER][:[GROUP]] PATH...]
[-copyFromLocal [-f] [-p] [-l] <localsrc> ... <dst>]
[-copyToLocal [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
[-count [-q] [-h] <path> ...]
[-cp [-f] [-p | -p[topax]] <src> ... <dst>]
[-createSnapshot <snapshotDir> [<snapshotName>]]
[-deleteSnapshot <snapshotDir> <snapshotName>]
[-df [-h] [<path> ...]]
[-du [-s] [-h] <path> ...]
[-expunge]
[-get [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
[-getfacl [-R] <path>]
[-getfattr [-R] {-n name | -d} [-e en] <path>]
[-getmerge [-nl] <src> <localdst>]
[-help [cmd ...]]
[-ls [-d] [-h] [-R] [<path> ...]]
[-mkdir [-p] <path> ...]
[-moveFromLocal <localsrc> ... <dst>]
[-moveToLocal <src> <localdst>]
[-mv <src> ... <dst>]
[-put [-f] [-p] [-l] <localsrc> ... <dst>]
[-renameSnapshot <snapshotDir> <oldName> <newName>]
[-rm [-f] [-r|-R] [-skipTrash] <src> ...]
[-rmdir [--ignore-fail-on-non-empty] <dir> ...]
[-setfacl [-R] [{-b|-k} {-m|-x <acl_spec>} <path>]|[--set <acl_spec> <path>]]
[-setfattr {-n name [-v value] | -x name} <path>]
[-setrep [-R] [-w] <rep> <path> ...]
[-stat [format] <path> ...]
[-tail [-f] <file>]
[-test -[defsz] <path>]
[-text [-ignoreCrc] <src> ...]
[-touchz <path> ...]
[-usage [cmd ...]]

-appendToFile <localsrc> ... <dst> :
Appends the contents of all the given local files to the given dst file. The dst
file will be created if it does not exist. If <localSrc> is -, then the input is
read from stdin.

-cat [-ignoreCrc] <src> ... :
Fetch all files that match the file pattern <src> and display their content on
stdout.

-checksum <src> ... :
Dump checksum information for files that match the file pattern <src> to stdout.
Note that this requires a round-trip to a datanode storing each block of the
file, and thus is not efficient to run on a large number of files. The checksum
of a file depends on its content, block size and the checksum algorithm and
parameters used for creating the file.

-chgrp [-R] GROUP PATH... :
This is equivalent to -chown ... :GROUP ...

-chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH... :
Changes permissions of a file. This works similar to the shell's chmod command
with a few exceptions.

-R modifies the files recursively. This is the only option currently
supported.
<MODE> Mode is the same as mode used for the shell's command. The only
letters recognized are 'rwxXt', e.g. +t,a+r,g-w,+rwx,o=r.
<OCTALMODE> Mode specifed in 3 or 4 digits. If 4 digits, the first may be 1 or
0 to turn the sticky bit on or off, respectively. Unlike the
shell command, it is not possible to specify only part of the
mode, e.g. 754 is same as u=rwx,g=rx,o=r.

If none of 'augo' is specified, 'a' is assumed and unlike the shell command, no
umask is applied.

-chown [-R] [OWNER][:[GROUP]] PATH... :
Changes owner and group of a file. This is similar to the shell's chown command
with a few exceptions.

-R modifies the files recursively. This is the only option currently
supported.

If only the owner or group is specified, then only the owner or group is
modified. The owner and group names may only consist of digits, alphabet, and
any of [-_./@a-zA-Z0-9]. The names are case sensitive.

WARNING: Avoid using '.' to separate user name and group though Linux allows it.
If user names have dots in them and you are using local file system, you might
see surprising results since the shell command 'chown' is used for local files.

-copyFromLocal [-f] [-p] [-l] <localsrc> ... <dst> :
Identical to the -put command.

-copyToLocal [-p] [-ignoreCrc] [-crc] <src> ... <localdst> :
Identical to the -get command.

-count [-q] [-h] <path> ... :
Count the number of directories, files and bytes under the paths
that match the specified file pattern. The output columns are:
DIR_COUNT FILE_COUNT CONTENT_SIZE FILE_NAME or
QUOTA REMAINING_QUOTA SPACE_QUOTA REMAINING_SPACE_QUOTA
DIR_COUNT FILE_COUNT CONTENT_SIZE FILE_NAME
The -h option shows file sizes in human readable format.

-cp [-f] [-p | -p[topax]] <src> ... <dst> :
Copy files that match the file pattern <src> to a destination. When copying
multiple files, the destination must be a directory. Passing -p preserves status
[topax] (timestamps, ownership, permission, ACLs, XAttr). If -p is specified
with no <arg>, then preserves timestamps, ownership, permission. If -pa is
specified, then preserves permission also because ACL is a super-set of
permission. Passing -f overwrites the destination if it already exists. raw
namespace extended attributes are preserved if (1) they are supported (HDFS
only) and, (2) all of the source and target pathnames are in the /.reserved/raw
hierarchy. raw namespace xattr preservation is determined solely by the presence
(or absence) of the /.reserved/raw prefix and not by the -p option.

-createSnapshot <snapshotDir> [<snapshotName>] :
Create a snapshot on a directory

-deleteSnapshot <snapshotDir> <snapshotName> :
Delete a snapshot from a directory

-df [-h] [<path> ...] :
Shows the capacity, free and used space of the filesystem. If the filesystem has
multiple partitions, and no path to a particular partition is specified, then
the status of the root partitions will be shown.

-h Formats the sizes of files in a human-readable fashion rather than a number
of bytes.

-du [-s] [-h] <path> ... :
Show the amount of space, in bytes, used by the files that match the specified
file pattern. The following flags are optional:

-s Rather than showing the size of each individual file that matches the
pattern, shows the total (summary) size.
-h Formats the sizes of files in a human-readable fashion rather than a number
of bytes.

Note that, even without the -s option, this only shows size summaries one level
deep into a directory.

The output is in the form
size disk space consumed name(full path)

-expunge :
Empty the Trash

-get [-p] [-ignoreCrc] [-crc] <src> ... <localdst> :
Copy files that match the file pattern <src> to the local name. <src> is kept.
When copying multiple files, the destination must be a directory. Passing -p
preserves access and modification times, ownership and the mode.

-getfacl [-R] <path> :
Displays the Access Control Lists (ACLs) of files and directories. If a
directory has a default ACL, then getfacl also displays the default ACL.

-R List the ACLs of all files and directories recursively.
<path> File or directory to list.

-getfattr [-R] {-n name | -d} [-e en] <path> :
Displays the extended attribute names and values (if any) for a file or
directory.

-R Recursively list the attributes for all files and directories.
-n name Dump the named extended attribute value.
-d Dump all extended attribute values associated with pathname.
-e <encoding> Encode values after retrieving them.Valid encodings are "text",
"hex", and "base64". Values encoded as text strings are enclosed
in double quotes ("), and values encoded as hexadecimal and
base64 are prefixed with 0x and 0s, respectively.
<path> The file or directory.

-getmerge [-nl] <src> <localdst> :
Get all the files in the directories that match the source file pattern and
merge and sort them to only one file on local fs. <src> is kept.

-nl Add a newline character at the end of each file.

-help [cmd ...] :
Displays help for given command or all commands if none is specified.

-ls [-d] [-h] [-R] [<path> ...] :
List the contents that match the specified file pattern. If path is not
specified, the contents of /user/<currentUser> will be listed. Directory entries
are of the form:
permissions - userId groupId sizeOfDirectory(in bytes)
modificationDate(yyyy-MM-dd HH:mm) directoryName

and file entries are of the form:
permissions numberOfReplicas userId groupId sizeOfFile(in bytes)
modificationDate(yyyy-MM-dd HH:mm) fileName

-d Directories are listed as plain files.
-h Formats the sizes of files in a human-readable fashion rather than a number
of bytes.
-R Recursively list the contents of directories.

很简单明了，前面的数字即为目录所占空间的大小，后面的因为我前期 备份数为3 后期改为2 所以可能会不一样