backuppc-rsync - 3.1.3.0-4+b1 main

rsync-bpc (as it is called upstream) is a patched variant of rsync
that has been developed specifically for server-side use with
BackupPC (https://github.com/backuppc/backuppc) version 4. It extends
the normal rsync so that it understands BackupPC 4's internal data
structures on disk and can directly write to it.
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You do neither need to use nor to install this package manually. It
is pulled in as dependency where needed.
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It is also no problem to install it in parallel with the normal rsync
as it does not install any binary in the common search path ($PATH),
just in a dedicated directory under /usr/libexec/.
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In terms of functionality it replaces the less performant Perl module
File::RsyncP (package libfile-rsyncp-perl) which was used by BackupPC
version 3 on the server side.