Poor write performance

[shah-antriksh]

I am using ES 1.5.1 with ssh version 1.4.0
I have around 100Gb of data that i want to copy from my cluster to a node.
A 1.5GB file when I copy through scp gets copied at speed of 45.3MB/s

But when I try to create snapshot with compression enabled it is being copied at the speed of 300kBps. I have changed the value of MaxSession to 100. My ES is a 10 node cluster.

Any suggestions/tips how to improve the write performance?