Backup your SVN repository with SVNSYNC
In this article, I will tell you how to create a backup repository on your PC or your second server.
First step: Create a new repository on your PC or your another server
svnadmin create backup-repository
Second step: Create a hook so as to give the repository the ability to change properties
On Linux/Unix-like
cat <<'EOF' > backup-repository/hooks/pre-revprop-change
#!/bin/sh
exit 0
EOF
Give the newly created file the permission of execution
chmod +w backup-repository/hooks/pre-revprop-change
On Windows
Simply create an empty file named pre-revprop-change.bat in hooks directory (ackup-repository\hooks\pre-revprop-change.bat)
Third step: Initialization the newly created repository
Consult svnsync init --help for more information
On Linux/Unix-like
svnsync init file://`pwd`/backup-repository http://svn.example.com/svn/ource-repository
On Windows
svnsync init file:///c:/full/path/to/backup-repository http://svn.example.com/source-repository
Forth step: Sync them!
svnsync sync file://`pwd`/backup-repository
svnsync sync file:///c:/full/path/to/backup-repository
If you wish, you can hook this command to post-commit hook of the source-repository, with this hook, you will keep you backup-repository up-to-date 
On Windows
On Linux/Unix-like
hey, thí ảticle was of great help, thanks !
It seems though the you forgot to mention the commands for the post commit hook.
thanks, pranav.
unable to trigger the command “svnsync sync file:///c:/full/path/to/backup-repository”. I have the following error can you please help me to sol this error
svnsync: Destination HEAD (1) is not the last merged revision (0); have you comm
itted to the destination without using svnsync?