We are trying to build a very fast system for capturing network packets to disk. We have a new server with two 10Gbps network cards, and an HP420i (integrated, I think) disk controller with 25 1.2TB hard drives. I'm currently running Ubuntu.
With our current configuration, I can get over 8Gbps of network packet data to a RAM disk, and about 4Gbps to a RAID0 array with 15k hard drives. Using fio I can get a consistent 471058KB/s, so it looks like I'm maxing out the current disk configuration.
Is there anything else we can do to bump up the disk write speeds? Would SSDs help? I'm a network guy so I'm not terribly versed on disk & RAID and could sure use some help!