Provided by: dirvish_1.2.1-1.2_all 
NAME
dirvish - Disk based virtual image network backup system
SYNOPSIS
dirvish --vault vault [ OPTIONS ]
DESCRIPTION
Create a backup image of a client directory tree.
Each image is a directory containing transfer log, summary, tree and if transfer errors
were detected an rsync_error file. The transfer log retains the the output of any pre and
post processing commands and the rsync log listing all files that were changed or added
with some statistical information. The summary file contains all the information about
how the image was created and meta-data for managing the image in config file format.
Tree is the copy of the client tree.
The client directory tree is compared with an existing image to create a new image.
Unchanged files are shared between images. For changed files only those parts that
actually change are transfered over the network. Unchanged portions of files are copied
from the reference image.
The resulting images contain complete copies of the original trees preserving ownership
and file permissions. In this way even though the backups are made incrementally, each
image can be used independently for restores or to make removable-media off-site copies or
archives.
The removal of an image will have no effect on other images.
OPTIONS
Each option on the command line may be specified any number of times. Those options that
support lists in the config files will accumulate all of their arguments otherwise each
specification will override the ones before.
As configuration files are loaded they may override options on the command line.
Each option may be unambiguously abbreviated.
--branch [vault:]branch_name
Specify a branch to use.
A branch is a sequence of images.
If a vault has been specified either here or with --vault the first time this
option is used it will attempt to load the config file branch_name or
branch_name.conf from the vault.
--config config-file
Load options from the specified file.
If this precedes --vault the --vault option will not load it's own config file.
If vault has been set and config-file is a bare filename the presence of one in the
vault will take precedence over one in the current directory. To specify one in
the current directory after --vault use ./ to precede the name.
The master configuration file will be read prior to processing options.
--expire expire_date
Specify a time for the image to expire.
See Time::ParseDate(3pm) for details.
This does not actually expire anything. What it does do is add an Expire: field to
the image summary file containing an absolute time so that a dirvish-expire or
another tool outside of dirvish can decide when to remove old images.
--image image_name
Specify a name for the image.
image_name is passed through POSIX::strftime
See strftime(3) for details.
--image-time parsedate_expression
Time to use when creating the image name.
If an absolute time without a date is provided it will be forced into the past. If
this isn't set the current time will be used.
See Time::ParseDate(3pm) for details.
--init Create an initial image.
Create the image entirely from the source tree without the use of a reference
image.
--no-run
--dry-run
Don't actually do anything.
Process all configuration files, options and tests then produce a
summary/configuration file on standard output and exit.
--reference branch_name|image_name
Specify an existing image or a branch from which to create the new image.
If a branch_name is specified, the last existing image from its history file will
be used. A branch will take precedence over an image of the same name.
--reset option
Reset the values in an accumulating option.
--summary short|long
Specify summary format.
A short summary will only include final used values. A long summary will include
all configuration values.
Default value: short
--vault vault[:branch_name]
Specify the vault to store the image in.
If not preceeded by --config this will attempt to load the config file default or
default.conf within the vault.
If branch_name is specified here this will behave exactly like the --branch option
and branch_name or branch_name.conf will be attempted instead of default.conf.
--version
Print version string and exit.
EXIT CODES
To facilitate further automation and integration of dirvish with other tools dirvish
provides rationalised exit codes. The exit codes are range based. While the code for a
specific error may change from one version to another it will remain within the specified
range. So don't test for specific exit codes but instead test for a range of values. To
the degree possible higher value ranges indicate more severe errors.
0 success
1-19 The backup job reported warnings.
20-39 An error occurred during index generation and cleanup.
40-49 A post-client or post-server command could not be run.
50-59 The post-client command reported an error. Its exit code modulo 10 is added to 50
60-69 The post-server command reported an error. Its exit code modulo 10 is added to 60
70-79 A post-client or post-server command could not be run.
80-89 The pre-server command reported an error. Its exit code modulo 10 is added to 80
90-99 The pre-server command reported an error. Its exit code modulo 10 is added to 90
100-149
Rsync encountered a non-fatal error.
150-199
Rsync encountered a fatal error.
200-219
An error was encountered in loading a configuration file.
220-254
An error was detected in the configuration.
255 Incorrect usage.
FILES
/etc/dirvish/master.conf
alternate master configuration file.
/etc/dirvish.conf
master configuration file.
/etc/dirvish/client[.conf]
client configuration file.
bank/vault/dirvish/default[.conf]
default vault configuration file.
bank/vault/dirvish/branch[.conf]
branch configuration file.
bank/vault/dirvish/branch.hist
branch history file.
bank/vault/image/summary
image creation summary.
bank/vault/image/log
image creation log.
bank/vault/image/tree
actual image of source directory tree.
bank/vault/image/rsync_error
Error output from rsync if errors or warnings were detected.
SEE ALSO
dirvish.conf(5)
dirvish-runall(8)
dirvish-expire(8)
dirvish-locate(8)
ssh(1)
rsync(1)
Time::ParseDate(3pm)
strftime(3)
AUTHOR
Dirvish was created by J.W. Schultz of Pegasystems Technologies.
BUGS AND ISSUES
Fields set in configuration files will override command line options that have been set
before the file is read. This behaviour while consistent may occasionally confuse. For
this reason most command line options should be specified after any options that may cause
a configuration file to be loaded.
In order to preserve permissions it is necessary for dirvish to run as root on the backup
server.
The root user must have non-interactive ssh access to the client systems. It is not
necessary that this access be as the root user on the client.
File ownership is preserved using numeric values so it is not necessary to have user
accounts on the backup server. Making the vaults network accessible using protocols that
map UIDs based on names instead of number could allow access controls on files to be
violated.
Making the vaults writable by users will compromise the integrity of the backups.
Therefore any access to the vaults by users should be done through a read-only mount.
DIRVISH(8)