NIC bonding, faster single backup?

[timnis]

Searched from the forum but didn't found answer...

If I have quad Gbe NIC and I bond those to one 4GBe link (4x1Gbe) do I get faster single backup times compared to single GBe NIC?
In other words does single backup use multiple streams or is it only one stream to PBS server?

 

[gurubert]

Bonding distributes the TCP connections across the physical devices based on a configurable hash that uses the MAC and/or IP addresses or even TCP ports.
A single TCP connection will always use just one physical interface of a bond.
Even if you have multiple TCP connections between the same machines they could run over the same interface if only MAC or IP hashing is used.
The same is true if the connections run over a router and only MAC hashing is used.

 

[_gabriel]

+ for information :
PBS, on next backup, will transfer only new data "over the wire" in its datastore, as it store one same data.