Synching files using rsync utility

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http://www.unix.com – Iam using rsync tool to sync files from one linux server to other linux server, however it takes huge time to finish it. so I tried running multiple instances of rsync for different directories in background and it resulted in the below mentioned error. rsync comand used: /usr/bin/rsync -acrz ${ABS_DIR} -e /usr/bin/rsh ${TARGET}:${TARGET_DIR} & the below error was thrown, poll: protocol failure in circuit setup rsync: connection unexpectedly closed (0 bytes received so far) [sender] rsync error: error in rsync protocol data stream (code 12) at io.c(463) [sender=2.6.8] Please let (HowTos)