Re: cp or ftp which is faster to transfer files between iseries?

Vern,

Nope. That requires SNA is all set up and in this case, it's TCP, All TCP and Nothing bu TCP. :-)

BUT Just for you I cranked up Extenders and gave that a spin.

FTP Still fastest as I expected.

That said, SAVRST did better than I expected. With the large file about 35% longer than FTP. With the small file it was terrible almost 7 times longer likely due to the overhead of starting communications and starting the receiving job on the target system. That overhead is the same amount of time with a little object or a large object.

As one further test I also saved the large object into a save file with no compression so it's almost exactly the same size. I then used SAVRSTOBJ to move that file and it was actually 5 seconds(5%) faster than SAVRST of the IFS file.


- Larry "DrFranken" Bolhuis

www.Frankeni.com
www.iDevCloud.com - Personal Development IBM i timeshare service.
www.iInTheCloud.com - Commercial IBM i Cloud Hosting.

On 1/1/2016 9:26 PM, Vernon Hamberg wrote:

Larry

Did you have a shot at using SAVRSTOBJ or SAVRSTLIB or SAVRST?

Vern

On 1/1/2016 4:06 PM, DrFranken wrote:

Here you are not using NFS you are using the Netserver (/QNTC).

I did some testing at one point between two IBM i 7.1 systems. They
are local so GbE between them. The files moved were a 300MB IFS file
and a 4GB IFS File.

In order of fastest to slowest:

FTP Basline (1.0)
CPY QFileSvr.400 17% Slower (*1) (*3)
CPY over NFS 30% Slower
scp 100% Slower (*2)
cp over QNTC 300% Slower
CPY over QNTC 300% Slower
cp QFileSvr.400 325% Slower
cp with NFS 550% Slower

(*1) = each type is this percentage additional time than the baseline.
(*2) = scp was not reliable with the 4G File. Fails half the time.
(*3) = QFileSvr.400 actually won the small file by 0.3 second.

cp is the cp command in QP2TERM
CPY is the IBM i CPY command

Observations:

1) I did not expect QFileSvr.400 to be this good. It surprised me.
However look at the massive difference when using that file system
with QP2TERM! Over 3 times longer!

2) Also note how slow cp is over NFS while NFS itself was close the
performance of QFileSvr.400

3) These were not Save Files, I believe they transfer more slowly when
the target is in /QSYS.LIB

4) Your Mileage May Vary!!!


- Larry "DrFranken" Bolhuis

www.Frankeni.com
www.iDevCloud.com - Personal Development IBM i timeshare service.
www.iInTheCloud.com - Commercial IBM i Cloud Hosting.

On 12/31/2015 7:47 PM, tim wrote:

im using nfs. here is example of cp command syntax. i am copying savf to
another iseries.

STRQSH CMD('cp /qsys.lib/qgpl.lib/ftplib.file
/qntc/10.0.0.93/root/iseriesbackup/QS36F')




On 12/31/2015 6:43 PM, Vernon Hamberg wrote:

What is the context? I know of cp as a QShell or PASE command and not
aware of it being used between servers - what are you using to make
the servers visible to each other? NFS? QFileSvr.400?

Vern

On 12/31/2015 4:54 PM, tim wrote:

cp or ftp which is faster to transfer files between iseries?