Bidirectional filesystem syncing - DirSync Pro vs. Unison

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12-03-2008

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Bidirectional filesystem syncing - DirSync Pro vs. Unison

12-03-2008 02:00 AM
Everyone knows and loves rsync, the command that lets you clone a directory tree to another disk or system with the ability to keep the clone fresh in an incremental and bandwidth-efficient manner. Sometimes, however, you want to sync in the reverse direction. With bidirectional filesystem syncing tools, there is no primary filesystem -- you just tell the tool to make sure both target directories, or clones, are identical. Here's a hands-on look at two tools designed to accomplish that task: DirSync Pro and Unison.

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LEARN ABOUT DEBIAN

btrfsctl

BTRFSCTL(8)						      System Manager's Manual						       BTRFSCTL(8)

NAME

       btrfsctl - control a btrfs filesystem

SYNOPSIS

       btrfsctl  [  -d file|directory  ] [ -s snapshot-name directory ] [  -S subvolume-name directory ] [  -r [+-]size ] [  -A device ] [  -a ] [
       -c ]

DESCRIPTION

       btrfsctl is used to control the filesystem and the files and directories stored. It is the tool to create a new snapshot for  the  filesys-
       tem.

OPTIONS

       -d file|directory
	      Defragment a file or a directory. If the argument is a directory, the entire b-tree under the directory is defragged.

       -s snapshot-name directory
	      Creates a new snapshot of the directory specified.

       -S subvolume-name directory
	      Creates a new subvolume.

       -r [+|-]size
	      Resizes  the  filesystem	with  the  size  specified.  If the value is preceded with a signed symbol, the filesystem is resized with
	      respect to the current filesystem size. size can be suffixed by k,m or g to represent kilobytes,	megabytes,  or	gigabytes  respec-
	      tively.

       -A device
	      Scans the device for btrfs filesystem.

       -a     Scans all devices present in the system for btrfs filesystem.

       -c     Forces a filesystem sync.

AVAILABILITY

       btrfsctl  is  part  of  btrfs-progs.  Btrfs is currently under heavy development, and not suitable for any uses other than benchmarking and
       review.	Please refer to the btrfs wiki http://btrfs.wiki.kernel.org for further details.

SEE ALSO

       mkfs.btrfs(8)

																       BTRFSCTL(8)

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