Lew Wolfgang wrote:
On 8/29/19 12:21 PM, Per Jessen wrote:
Lew Wolfgang wrote:
So, what are the options for sending many large files between machines without encryption?
SSH insists on encryption, but there are apparently patches that will allow it to be turned off. We looked into this some years back, with exactly the same reasoning. AFAIR, the best option was instructing ssh to use some low-quality (ie. cheap) cipher.
In the end we didn't bother - there's some extra load on the CPU on both ends, but nothing worth mentioning.
Other options - nfs, iscsi?
Hmm... iscsi? I might have to take a look.
We still use nfs, but from distant past experience there's quite a performance hit. I'll revisit and run some tests.
These days, nfs4 and iscsi are much the same. I just have a penchant for iscsi, and maybe handing off some of the load to hardware does help We don't have 10GbE yet, only 1GbE - offloading to the network card at least take a load off the CPU. (okay, gut feeling, I have not measured it).
BTW, using classic rcp we were able to get about 80% of wire-speed on a 10-GbE connection, but only about 30% when using scp. I'm assuming that encryption is the big driver here.
Wow, that's a _major_ drop. If it were me, I'd look at all the numbers. A 50% drop by the CPU(s) not being able to process the data fast enough? How about building rcp from source? or writing your own. -- Per Jessen, Zürich (20.2°C) http://www.dns24.ch/ - your free DNS host, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org