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

Roger Tsang perj8 at hotmail.com
Mon Jul 25 21:56:30 CEST 2005

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Interesting nonetheless.  Can you tell us what hardware and kernel version 
you are using?  Thanks!

>From: "Anquijix Schiptara" <anquijix at hotmail.com>
>To: drbd-user at lists.linbit.com
>Subject: [DRBD-user] Low speed sync with Gbit interface?
>Date: Mon, 25 Jul 2005 10:33:36 +0200
>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
>Die MSN Search liefert innerhalb kürzester Zeit die besten Ergebnisse! 
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>drbd-user at lists.linbit.com

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