Hi,
We are trying to configure a DRBD resource as a Physical Volume, using
examples from the following document.
http://www.drbd.org/users-guide/s-lvm-drbd-as-pv.html
DRBD works well, but there are some perfomance problems.
We run "dd" like thie;
# dd if=/dev/zero of=/mnt/dd/10GB.dat bs=1M count=
On Fri, May 20, 2011 at 05:32:52PM +0900, Junko IKEDA wrote:
> Hi,
>
> We are trying to configure a DRBD resource as a Physical Volume, using
> examples from the following document.
> http://www.drbd.org/users-guide/s-lvm-drbd-as-pv.html
>
> DRBD works well, but there are some perfomance problems
Hi,
> DRBD version, LVM version, Device mapper version (kernel version),
> distribution?
DRBD version
8.3.10(we noticed this with 8.3.5 at first, and update DRBD after that)
LVM version
LVM2(included RHEL in 5.2)
kernel version
2.6.18-92.EL5 (x86_64）
distribution
RHEL 5.2
> What about oflag=d
Hi,
It seems that LVM2 included in RHEL 5 has same problems,
so we run the same test on RHEL 6.1.
in this case, DRBD was trapped in I/O error.
Does DRBD support "merge fn"?
I heard that device-mapper on RHEL 6 cut I/O down to page size if the
low level block device didn't support cut down.
Thank
> Does DRBD support "merge fn"?
> I heard that device-mapper on RHEL 6 cut I/O down to page size if the
> low level block device didn't support cut down.
sorry, weird text...
RHEL 6 cut I/O down to page size if the low level block device didn't
support "merge fn".
_
On Mon, May 23, 2011 at 07:44:08PM +0900, Junko IKEDA wrote:
> Hi,
>
> It seems that LVM2 included in RHEL 5 has same problems,
> so we run the same test on RHEL 6.1.
> in this case, DRBD was trapped in I/O error.
"trapped in I/O error" is supposed to mean what, in this context?
Can you elaborate
Hi,
> "trapped in I/O error" is supposed to mean what, in this context?
> Can you elaborate or rephrase?
Here is the testing environment and logs;
OS
Red Hat Enterprise Linux Server release 6.1 (Santiago)
kernel
Linux node1 2.6.32-131.0.15.el6.x86_64 #1 SMP Tue May 10 15:42:40 EDT
2011 x86_64 x
Hi,
sorry again,
The case (1)-(3) in my previous mail has no LVM.
put it all together,
1. DRBD 8.3.10 + LVM2(RHEL 5.2)
We are trying to configure a DRBD resource as a Physical Volume,
using examples from the following document.
http://www.drbd.org/users-guide/s-lvm-drbd-as-pv.html
There is a pe
drbd-user-boun...@lists.linbit.com
> [mailto:drbd-user-boun...@lists.linbit.com] On Behalf Of Junko IKEDA
> Sent: Tuesday, May 24, 2011 1:01 AM
> To: drbd-user@lists.linbit.com
> Subject: Re: [DRBD-user] the perfomance issuce with a physical volume
> synchronization
>
> Hi,
&
On Tue, May 24, 2011 at 02:00:35PM +0900, Junko IKEDA wrote:
> Hi,
>
> > "trapped in I/O error" is supposed to mean what, in this context?
> > Can you elaborate or rephrase?
>
> Here is the testing environment and logs;
>
> OS
> Red Hat Enterprise Linux Server release 6.1 (Santiago)
>
> kernel
Hi,
> DRBD does not build out of the box on that RHEL 6.1 kernel.
> Wherever that package originates, that someone did some patching
> to "make it work", only that it made it break.
>
> Got it to compile and load, but as we can see,
> it breaks when using a file system.
Oh, I see...
Sure, the per
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