I am a little confused. Please correct me if I am wrong.
For Directly Attached Storage (DAS):
The limitation is ether on the hard drive or the controller.
On SATA drives, the top speed is about 250MB/s
On SAS drives, the speed is limited on the PCIe controller, somewhere 300-400MB/s
The limitation is on the network. If it's 1Gbps and the NIC is PCIe, there's no way for data transfer rate to go over 100MB/s
I have also looked at both Gluster and OpenFiler, but couldn't figure out how to use them to increase my throughput.
It seems the best option is to use DAS with RAID 0 or 1+0 SATA drives with a good PCIe controller.
Is this right?