Network Speed Question
This is not specifically an MD issue.
I have an MD be with 4xSegate 1.5 TB drives that will read/write at 400+ MB/s (yes, MB not Mb) and a workstation with the same array used to back it up from time to time. I've been backing up using rsync over gigabit Ethernet (125 MB/s raw nominal, less overhead) and have been disappointed with the throughput (about 45-50 MB/s sustained). STFW suggests the bottleneck is the lane connecting the onboard nics (broadcom IIRC) are attached to the chipset. But I'm not 100% sure of that.
My thought is that for $40 each I can pick up an Intel PCI-e CT NIC (PCI-e x1 nominally 250 MB/s)
and configure it for 9k Jumbo frames over the DIR-655 switch.
Do any of you have thoughts or experience on this? If I can cut my backup time in half I'd be happy.