> What is the practical network speed on a 2 x 1Gbps channel > bond between two servers. I have 2 x dell PowerEdge servers > running SLES10SP2 and both connected with two Gigabit NIC in > a bond with mode-0. The switch is Dell powerconnect. While > doing ftp, I am getting around 90-98MB/s for single process. > If I put 2 jobs together, the total reaches around > 150-160MBps. The question is, is this the maximum?
Yes you are getting as much as you can expect. Bonding is generally for one server and many clients -- the sum of traffic to many clients may possibly exceed one Gbps, but one client (the other server in your example) will not. When you try two sessions from one client, you may get more than 1Gbps, depending on how the traffic gets switched between the two outbound NICs. Various bonding choices allow or prevent single client/multi-session traffic spread across the NICs. Most I ever did was 6 NICs bonded for serving numerous clients. Surprisingly it worked (it was not a Dell machine, tho). Used a Cisco switch. > > Or is it limited by my disk system? I am using PERC-6E with > MD1000 on one server and MD-3000 on other server. I would expect 100 to 120Mbyte/sec if your disk was not busy. "iostat -xk 5 500" and look at your disk. If it is 100% busy (the last column) your disk is maxed out. --John _______________________________________________ Linux-PowerEdge mailing list [email protected] https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
