Re: Ethernet bonding mode 5 only using one Slave adapter.

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What workload do you have that requires 400 MB/s of parallel stream TCP
throughput at the server? NFS, FTP, iSCSI? If this is a business
requirement and you actually need this much bandwidth to/from one
server, you will achieve far better results putting a 10GbE card in the
server and a 10GbE uplink module in your switch. Yes, this costs more
money, but the benefit is that all client hosts get full GbE bandwidth
to/from the server, all the time, in both directions. You'll never
achieve that with the Linux bonding driver.

I appreciate your detailed email. it clears lots of confusion going inside my mind.

the reason of increasing bandwidth is testing clustering /VM hosting on NFS and VM backups. My company is about to host their product inside our foreigner office-premises and i will be maintaining those servers remotely,. therefore i need to consider high availability of our service and that's why trying to test different technologies that can full-fill our requirement.

Specificity testing Ceph clustering for hosting purposes. and for backing up my VMs as you know VMs are huge and moving them around on 1GB x-over point to point link takes time. so i thought i could increase some of the bandwidth and can use link aggregation to avoid single point of failure.

i agree with you on buying 10GB LANs but unfortunately as i am testing this stuff very far far away from US these cards are not easily available in my country, thus unnecessarily expensive.

if you still have any advice for such scenario as mine i will be more glad to have it.

Thanks.

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Stan