[DRBD-user] DRBD write throughput very very bad

[Tobias Appel]

Thanks for these options. I did read up on them and I want to disable 
all of those since I have a battery backed controller.
Currently in my config in the disk section I only have:

disk {
on-io-error detach;
}

when I tried adding any of those options listed by you I received an 
error like this:

/etc/drbd.conf:25: Parse error: 'an option keyword' expected,
	but got 'no-disk-barrier'
Starting DRBD resources:    /etc/drbd.conf:25: Parse error: 'an option 
keyword' expected,

And also I did not find any "wo:" when running cat /proc/drbd | grep wo
Is it because my version is too old? I'm using 8.0.14 but according to 
the documentation it should be available since 8.0.9.

Tobi

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