svnsync synchronize (sync) — Transfer all pending revisions from the source repository to the mirror repository.
The svnsync synchronize command does all the heavy lifting of a repository mirroring operation. After consulting with the mirror repository to see which revisions have already been copied into it, it then begins to copy any not-yet-mirrored revisions from the source repository.
svnsync synchronize can be gracefully canceled and restarted.
When SOURCE_URL is
            provided, svnsync will use it as the
            repository URL which the destination repository is
            mirroring. Generally, SOURCE_URL
            will be exactly the same source URL as was used with
            the svnsync initialize command when the
            mirror was first set up.  You may choose, however, to
            omit SOURCE_URL, in which
            case svnsync will consult the mirror
            repository's records to determine the source URL which
            should be used.
| ![[Warning]](images/warning.png)  | Warning | 
|---|---|
| We strongly recommend that you specify the source URL on the command-line, especially when untrusted users have write access to the revision 0 properties which svnsync uses to coordinate its efforts. | 
Copy unsynchronized revisions from the source repository to the mirror repository:
$ svnsync synchronize file:///var/svn/repos-mirror \
                      http://svn.example.com/repos
Committed revision 1.
Copied properties for revision 1.
Committed revision 2.
Copied properties for revision 2.
Committed revision 3.
Copied properties for revision 3.
…
Committed revision 45.
Copied properties for revision 45.
Committed revision 46.
Copied properties for revision 46.
Committed revision 47.
Copied properties for revision 47.
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