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ssync(1) General Commands Manual ssync(1) NAME ssync - minimalistic filesystem sync tool SYNOPSIS ssync [options] ssyncd [options] DESCRIPTION Ssync is a minimalistic filesystem synchronization utility. Its primary goals are reliability, correctness, and speed in syncing extremely large filesystems over fast, local network connections. Ssync does not implement encryption, compression, differencing algorithms, or remote synchronization over a pipe such as rsh / ssh since those features are already well covered by other utilities such as rsync. Ssync works well on large filesystems and can handle filesystem objects with unusual and non-ASCII characters in their names while correctly preserving all symbolic and hard links and all mode bits. It can be run at increased or decreased niceness and can provide several levels of logging output. Several options allow complete control of synchroniza- tion behaviors such as selectively disabling updating of data, owner- ship, and modes, as well as updating only newer objects or just per- forming 'test runs'. The basic behavior of both interactive and daemon versions of the pro- gram is to read a list of source and destination paths from a specified work file and take whatever actions are necessary to make the destina- tions identical to the sources. Each line of the work file takes the form: <source path> | <destination path> Any text following a # character to end of line in the work file is considered a comment and ignored. OPTIONS All options may be set on the command line in either short or long form as well as in a configuration file. For the interactive version (ssync), the default configuration file is .ssyncrc in the current di- rectory. For the daemon (ssyncd), /usr/local/etc/ssyncd.conf is the de- fault. Settings in the configuration file have the same name as the long option and take a form such as: work-file: /usr/local/etc/ssyncd.work Any text following a # character to end of line in the configuration file is considered a comment and ignored. Example configuration and work files, as well as some more extensive development rationale may be found in the file README.HTML. If you installed a binary package, this file as well as some examples should be located in your distribution's doc directory for this package. If you built from a source tarball, then it should have included the documentation and example files. -h --help display usage message and version -c PATH --conf-path=PATH read alternative config file from the default -i NUM --interval=NUM number of seconds to sleep between completing one run and start- ing the next -w PATH --work-file=PATH path for file containing work list (see also src-path and dst- path) -f PATH --src-path=PATH alternative way to specify a single source path -t PATH --dst-path=PATH alternative way to specify a single destination path -n (-20 - +20) --priority=(-20 - +20) scheduling priority or 'niceness', lower numbers are more rude, see renice(8), for more details -F --no-detach do not daemonize (use with log-mode: stderr) -D --no-sync-data do not sync data (content) of files -T --no-sync-time do not sync atime / mtime -M --no-sync-meta do not sync meta-data (uid / gid / mode) -U --update-only only sync things if source mtime is > destination mtime -X --test run sync procedure and collect statistics without actually modi- fying anything -p PATH --pid-path=PATH path for pid file -m (file|syslog|stderr) --log-mode=(file|syslog|stderr) logging mode -l PATH --log-path=PATH path for log file if using file based logging -s STRING --log-ident=STRING identification string if using syslog based logging -v (0 - 5) --log-level=(0 - 5) logging verbosity, 2 is default, 3 is errors only, 0 lists all updates and deletions FILES $PWD/.ssync default configuration file for ssync /usr/local/etc/ssyncd.conf default configuration file for ssyncd /usr/local/etc/ssyncd.work default work file for ssyncd /var/log/ssyncd.log default log file for ssyncd /var/run/ssyncd.pid default pid file for ssyncd BUGS Due to the simple-mindedness of the configuration file parser, paths containing whitespaces and unusual characters in the work file will not be parsed properly. This limitation does not apply to anything under- neath the specified paths, just the starting points as listed in the work file. AUTHOR This manual page was written by Michael W. Shaffer <mwshaffer@angry- pot.com>, March 22, 2002 ssync(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | FILES | BUGS | AUTHOR
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