-# Copyright (C) 2008 Andre Noll <maan@systemlinux.org>
+# Copyright (C) 2008 Andre Noll <maan@tuebingen.mpg.de>
#
# Licensed under the GPL v2. For licencing details see COPYING.
package "adu"
-purpose "advanced disk usage
+purpose "
adu creates a database containing disk usage statistics of a given
directory. It allows to query that database to quickly retrieve
section "General options"
#########################
-option "config-file" c
-#~~~~~~~~~~~~~~~~~~~~~
-"(default='~/.adurc')"
-string typestr="filename"
+option "loglevel" l
+#~~~~~~~~~~~~~~~~~~
+"Set loglevel (0-6)"
+int typestr="level"
+default="4"
optional
details="
- Options may be given at the command line or in the
- configuration file. As usual, if an option is given both at
- the command line and in the configuration file, the command
- line option takes precedence.
+ Log messages are always written to stderr while normal output
+ goes to stdout. Lower values mean more verbose logging.
+"
+defgroup "database"
+#==================
+groupdesc="
+ There are two ways to specify a database directory. You can either
+ specify a full path using the database-dir option or a root path
+ using the database-root option. In the latter case, a directory
+ structure matching that of the base-dir argument is created
+ below the given full path.
+
+ The advantage of using database-root is that the base-dir is
+ used to find the relevant database both in create and select mode
+ and you do not have to care for setting the database-dir explicitly.
"
-option "database-dir" d
-#~~~~~~~~~~~~~~~~~~~~~~
+groupoption "database-dir" d
+#~~~~~~~~~~~~~~~~~~~~~~~~~~~
"directory containing the osl tables"
+group="database"
string typestr="path"
-required
details="
Full path to the directory containing the osl tables. This
- directory must exist. It must be writable for the user running
- adu in --create mode and readable in --select mode.
-
-"
-option "loglevel" l
-#~~~~~~~~~~~~~~~~~~
-"Set loglevel (0-6)"
-int typestr="level"
-default="3"
-optional
-details="
- Log messages are always written to stderr while normal output
- goes to stdout. Lower values mean more verbose logging.
+ directory is created if it does not exist. It must be writable for the
+ user running adu in --create mode and readable in --select mode.
"
-option "paths" p
-#~~~~~~~~~~~~~~~
-"files to take into account"
-string typestr="pattern"
+groupoption "database-root" r
+#~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+"directory containing directories containing the osl tables"
+group="database"
+string typestr="path"
+default="/var/lib/adu"
+dependon="base-dir"
optional
details="
- Shell wildcard pattern that must match a file in order to be
- included in the database in --create mode or in the output
- for --select mode. Only the part of the filename below the
- base directory is matched against the pattern. The default
- is to take all files into account. See fnmatch(3) for details.
+ Base path to the directory containing the osl tables. The real
+ database-dir is generated by appending base-dir. This
+ directory is created if it does not exist. When used in select
+ mode you have to specify the base-dir as well.
"
###############
defgroup "mode"
#==============
groupdesc="
- adu may be started in one of two possible modes, each of which
- corresponds to a different command line option. Exactly one
- of these options must be given.
-
+ adu may be started in one of three possible modes, each of
+ which corresponds to a different command line option. Exactly
+ one of these options must be given.
"
required
"Create a new database"
group="mode"
details="
- Traverse the given directory and track disk user on a per-user
- basis. Results are stored in N + 1 osl tables where N is
- the number of uids that own at least one regular file in
- that directory.
+ Traverse the given directory and track disk usage on a
+ per-user basis. Results are stored in N + 1 osl tables where
+ N is the number of uids that own at least one regular file
+ in that directory.
"
groupoption "interactive" I
"activate interactive mode"
group="mode"
details="
- In this mode, adu reads commands from stdin.
+ In this mode, adu reads commands from stdin. This makes it
+ possible to run different select queries without opening the
+ underlying osl database for each query (which is expensive).
+
+ In interactive mode, several subcommands are available, see
+ the end of this document.
"
groupoption "select" S
"query a database previously created with --create"
group="mode"
details="
- This option prints statistics about matching subdirectories to
- stdout. The output depends on the other options, see below.
+ This option prints statistics about matching subdirectories
+ to stdout, to an output file or pipes the output to a given
+ command, depending on the --output option. The output format
+ can be customized by specifying select options, see below.
"
##############################
#~~~~~~~~~~~~~~~~~~
"directory to traverse"
string typestr="path"
-dependon="create"
optional
details="
- The base directory to be traversed recursively. Must be
- given if --create mode was selected. A warning message is
- printed for each subdirectory that could not be read because
- of insufficient permission. These directories will be ignored
- when computing statistics.
+ The base directory to be traversed recursively. A warning
+ message is printed for each subdirectory that could not be
+ read because of insufficient permissions. These directories
+ will be ignored when computing statistics.
"
option "one-file-system" x
flag off
dependon="create"
details="
- Skip directories that are on different filesystems from the
+ Skip directories that are on different file systems from the
one that the argument being processed is on.
"
users. Decreasing the value causes adu to use slightly less memory.
"
+option "bloom-filter-order" B
+#~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+"use bloom filters for hard link detection"
+int typestr="order"
+dependon="create"
+default="23"
+optional
+details="
+ Allocate bloom filters of size 2^order bits. Each regular
+ file with hard link count greater than one is added to these
+ filters which allows to detect hard links on a per-user basis.
+ Greater values reduce the probability of false positives but
+ require more memory.
+
+ Values less than 10 deactivate this feature so that no hard
+ links are being detected.
+"
+
+option "num-bloom-filter-hash-functions" N
+#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+"number of hash functions for the bloom filters"
+int typestr="num"
+dependon="create"
+default="10"
+optional
+details="
+ Cause each entry which is added to the bloom filter to set
+ \"num\" bits of the bloom filter.
+"
+
+##############################
+section "Options for --select"
+##############################
+
option "select-options" s
#~~~~~~~~~~~~~~~~~~~~~~~~~
"Options for select mode"
optional
dependon="select"
details="
- Try --select-options \"-h\"
+ This option takes a string whose content is another set of
+ options as described below. Select options may be specified
+ either directly in select mode, in which case you have use
+ quotes to prevent the select options from being interpreted
+ as adu options, or via the \"set\" command in interactive mode.
"
projects / adu.git / blobdiff