Compressing them using gzip (you can use this command in a shell script and place it in archive_command as well) would possibly reduce the size to as low as 10 - 20 GB.
The network bandwidth between the servers is definitely not an issue. What is bothering me is the big size of the wal archives, which goes up to 200GB per day and if the standby server will be able to replay all these files. The argument that; since the master can do it and also do various other tasks at the same time, and since the secondary is identical to the first, so he should be able to do that seems valid, so i will give it a try and let you know about the results. In the meantime if there are any other ideas/suggestions etc please let me know. thx to all
