Re: Linux NIC bonding

[Stefan Piperov (Brown HEP)]

Isn't amanda using a single data-stream per client? I'm not sure this can be split across multiple NICs even in 802.3ad/LACP.

On an old server I had 4 ports bonded in that way, but never saw incoming traffic exceeding 1Gbps. Amanda was backing up one client at a time, and each stream was limited to 1Gbps.

You'll probably have to go for a pair of cheap 10Gb cards, if you really need that speed of backing up.

Cheers,

- Stefan

On Jun 2, 2018 04:38, "Stefan G. Weichinger" <s...@amanda.org> wrote:

I have an amanda server and an amanda client, both run latest Debian and
amanda.

Both have 2 GBit/s NICs each and they are bonded via linux bonding
module, mode 4 (LACP). For sure there is also a trunk defined on the
switch ports. The bonding works fine when I test with several rsync or
scp copies.

Amanda/amdump seems to only saturate one GB port of the client.

I edited the default interface definition "local" in amanda.conf already
to say 2Gbps (I know that is more of a calculation parameter).

Does mode 4 allow to use the full 2 Gbps with one client MAC only? I
know that lower modes decide how to distribute traffic based on MACs but
I am unsure about mode4.

Does someone successfully use bonding with amanda like I plan to?