On Mon, May 26, 2008 at 7:36 AM, William Cobau <[EMAIL PROTECTED]> wrote: > Tcpreplay community, > > I am already successfully using tcpreplay for my testing activities. Our > setup is rather simple with a Linux server (typically Redhat EL5) connected > directly via 1000 B/T to the system under test. The linux server uses > tcpreplay (presently v3.2.5, but we could/will upgrade to v3.3.x) to send > previous captured data streams to the system under test. There is no need > for tcprewrite or the other tools in the tcpreplay suite as the tcpreplay > box is simulating a mirror port or a tap. > > We are trying to enhance our testing by increasing amount of data and the > data rate. The data was captured at roughly 350 Mbps over 3 hours for 450 > Gbytes/1e9 packets. > > Has anyone built or bought a box that handles this data rate and volume? Any > suggestions or comments would be welcome.
There are a number of "tcpreplay in a box" solutions out there: http://www.simena.net/TrafficGenerator.htm http://www.dejavunetwork.com/ I've never even touched either of those boxes, so don't consider this an endorsement or anything like that. But 350Mbps should be pretty doable with a decent HW RAID controller (either 0 or 5 is probably the way to go) card and enough drives. Finding the right bang for the buck is a bit more tricky. Remember tcpreplay is very sequential read heavy, so optimize for that, not random access. Anyways, spend your $$$ on RAID controller/disks and a good Intel Pro/1000 based cards (all PCI-Express). Not much multi-threading to worry about so a single dual-core CPU is fine, but you'll want to get a fast one. With that much traffic, you won't be able to use the tcpreplay cache option so you only need a few GB of RAM. You might want to read the postgresql-performance (or any other DB list) archives and see what RAID controllers do well for sequential reads/writes. DB people seem to spend the most time/effort tweaking their disks which is what you need to do here. -- Aaron Turner http://synfin.net/ http://tcpreplay.synfin.net/ - Pcap editing & replay tools for Unix They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety. -- Benjamin Franklin ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Tcpreplay-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/tcpreplay-users Support Information: http://tcpreplay.synfin.net/trac/wiki/Support
