[DRBD-user] DRBD write throughput very very bad

Gennadiy Nerubayev parakie at gmail.com
Sat Apr 18 21:37:09 CEST 2009

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


On Fri, Apr 17, 2009 at 5:50 AM, Tobias Appel <tappel at eso.org> wrote:

> Hi,
>
> I have 2 Sun xFire 4140 servers, each with 4x 74GB SAS HDD (don't know
> the manufacturer by heart). I used the hardware raid controller to
> create 2x Raid 1 Partition out of those 4 disks. One of those partitions
> is for  the OS only and one is for DRBD only.


Hi,

Try using some combination of the following in the disk section of
drbd.conf, if you're not already:

no-md-flushes;
no-disk-flushes;
no-disk-barrier;

I find that usually they're needed to achieve proper speed with DRBD on a
hardware raid controller.

-Gennadiy
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