Rsync hangs transfer
How to fix hanging transfers when using Rsync.
Rsync may hang on transfer of files and folders. Usually this is caused by using the wrong options with the Rsync command.
Thee Memory usage of Rsync is directly proportional to the size and number of directories transferred. Maintain an adequate amount of free memory on the server for Rsync operations.
You can analyze the memory using commands such as:
$ cat /proc/meminfo $ vmstat -s $ top -c
Wrong Rsync options
Generally, the Rsync transfer hangs if incorrect options are being used.
--partial --progress to tell Rsync to keep partially transferred files (by default it deletes them).
-timeout=0 to not allow Rsync to timeout.
-z to compress files during the data transfer.
Upgrade Rsync to the latest version.
Check that Rsync version you're using on both the local machine and remote machine:
$ rsync --version
Update Rsync to the latest version:
Ubuntu and Debian*
$ apt-get --only-upgrade install rsync
CentOS, RedHat, Fedora
$ yum update rsync