Shell Programming and Scripting

It takes 6 hrs for a 90 GB zip file that i am copying / transferring from serverA onto serverB.

Code:

scp user1@serverA:/opt/setup/cash.zip .
Output:
cash.zip            21%   19GB   4.7MB/s 4:11:46 ETA

Code:

uname -a
SunOS serverB 5.11 11.2 sun4v sparc sun4v

Can you please suggest if i could do something to speedup the file transfer ?

its based on the network bandwidth available between 2 locations. currently i see it transfers 4.7Mb/Sec.

where is server A and B is located ?

I dont know how far are they located as they are client servers. So i may need to inquire with them as i dont know how to figure it out myself.

I was looking more so from the command prospective if we can tweak it for faster transfer based on pre-conditions.

I will live with it if there is no way out.

If this is a regular transfer of a file or files that are updated (not completely re-written) you may have an improvement with rsync. This would examine the files at each end and only transmit the blocks that need changing so there should be less to transfer. Of course, if the target file does not exist, it will send the whole file, so you are stuck waiting on the network as above.

If you need to encrypt the connection (i.e. it's not a private network) then search for the string encrypt in the manual page and there are some examples there.

You can improve the network speed by paying for a faster link between the two sites, but that comes down to a business cost justification. I suppose with a complex network with many hops, it might be possible to improve things if a direct link could be set up, but this is entirely down to how the network is delivered. It might be possible to set up a VPN connection from one site to another over the public internet, but there are no guarantees that it will actually be any faster.



I hope that this helps,
Robin

What is the contents of the zip file?
Were a part of its files already transferred?
If yes, that is where rsync comes into play.

What are the operating systems at each end?

The option -C enable compression on the fly for scp command