Re: Poor network performance for clients in 100MB to Gigabit environment

2008-07-02 Thread Ingo Flaschberger
Dear David, try to enable flow-control at the gig-e switch and freebsd network card. Kind regards, ingo flaschberger geschaeftsleitung --- netstorage-crossip-flat:fee powered by crossip communications gmbh --- sebastian kneipp gasse 1 a-10

Re: Poor network performance for clients in 100MB to Gigabit environment

2008-07-01 Thread Jack Vogel
Take it from someone who has spent a couple weeks beating his head against a wall over this... system tuning is essential. If your driver is going to the kernel looking for a resource and having to wait, its gonna hurt... Look into kern.ipc, and as Paul said net.inet. Off the shelf config is mor

Re: Poor network performance for clients in 100MB to Gigabit environment

2008-07-01 Thread Paul
What options do you have enabled on the linux server? sysctl -a | grep net.ipv4.tcp and on the bsd sysctl -a net.inet.tcp It sounds like a problem with BSD not handing the dropped data or ack packets so what happens is it pushes a burst of data out > 100mbit and the switch drops the packets and

Poor network performance for clients in 100MB to Gigabit environment

2008-07-01 Thread David Kwan
I have a couple of questions regarding the TCP Stack: I have a situation with clients on a 100MB network connecting to servers on a Gigabit network where the client read speeds are very slow from the FreeBSD server and fast from the Linux server; Write speeds from the clients to both servers ar