一年偶尔有几次就不行了；
报错：
@ERROR: max connections (8) reached - try again later
rsync: connection unexpectedly closed (0 bytes received so far) [receiver]
rsync error: error in rsync protocol data stream (code 12) at io.c(359)
[root@iiii ~]# ./rsync.sh
@ERROR: max connections (8) reached - try again later
rsync: connection unexpectedly closed (0 bytes received so far) [receiver]
rsync error: error in rsync protocol data stream (code 12) at io.c(359)
[root@iiii ~]# ./rsync.sh
@ERROR: max connections (8) reached - try again later
rsync: connection unexpectedly closed (0 bytes received so far) [receiver]
rsync error: error in rsync protocol data stream (code 12) at io.c(359)
You have new mail in /var/spool/mail/root
[root@iiii ~]# ./rsync.sh
@ERROR: max connections (8) reached - try again later
rsync: connection unexpectedly closed (0 bytes received so far) [receiver]
rsync error: error in rsync protocol data stream (code 12) at io.c(359)
[root@iiii ~]# ./rsync.sh
@ERROR: max connections (8) reached - try again later
rsync: connection unexpectedly closed (0 bytes received so far) [receiver]
rsync error: error in rsync protocol data stream (code 12) at io.c(359)
[root@iiii ~]# ./rsync.sh
可以设置大些：
max connections = 25
另外，多台机器同步时候的频率分开些：
比如：
*/1 * * * * /root/rsync.sh
*/2 * * * * /root/rsync.sh
*/3 * * * * /root/rsync.sh