Copying large files to remote nodes in treemode is slow

[luxiaoyong]

I use the treemode to copy a 136MB file to 142 remote nodes with the following command, which took 36 minutes:
clush -o-q -w "node1 node2" --copy test.tar --dest /tmp/
However, when I turn off the treemode, the same copy only took 20 seconds. Sometimes, copying large files may freeze (occasionally), but there are no error messages during the copying process. Could you please explain what protocol treemode uses for large file copying? Is it possible to optimize this feature?

[degremont]

This is a known limitation that the tree mode has sub-optimal performance. This is more a convenient feature for running commands or copying small files (think configuration files) on nodes that would not be reachable otherwise.
This is not a file transfer feature and does not compare to scp, rsync, etc...

We can keep this ticket open as a request to implement a faster transfer mode, but this is low priority for now.

[luxiaoyong]

Thank you. I see. I used other methods to avoid this problem.