[DRBD-user] Low speed sync with Gbit interface?

Anquijix Schiptara anquijix at hotmail.com
Mon Jul 25 10:33:36 CEST 2005

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Hi there

I mirror the DRBD device over a GBit interface and i only have a speed 
around of 50mb/s.

Here the output of  cat /proc/drbd
0: cs:SyncSource st:Secondary/Secondary ld:Consistent
    ns:37482508 nr:0 dw:0 dr:37489504 al:0 bm:5402 lo:96 pe:2221 ua:1749 
        [========>...........] sync'ed: 42.0% (14435/24871)M
        finish: 0:14:39 speed: 16,692 (50,888) K/sec

I set the MTU of the eth1 interface to 9000 and updated the kernel in hope 
of fixing the bic congestion bug.
Maybe i should install a specific patch for this problem.  But, where i can 
find such patch and how to install? I never installed a kernel patch and i 
dont find any useable docs to that..

I set the rate to 700000K, what seems to be the maximum possible speed.

Im using Fedora Core 4  2.6.12-1.1398_FC4smp

Thanks for help

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