Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I'm experiencing a similar problem with 8.0.4 DRBD even if not so strong
as Mark wrote. My system are still usable but my iowait is around 90% on
a pseudo 400% cpu system (2 HT CPU that seems 4 to the system).
Is there anyway to resolve such an issue?
Mark Richardson wrote:
>
> Hi,
>
> I experience problems when only one node is up:
> Only a few writes to the filesystem put the iowait up to 99% and the
> volume (lvm) becomes unresponsive.
>
> I've had the same problem when status is WFConnection and Standalone,
> this really defeats the purpose of replicating between two nodes if
> both of them need to be online, I think I am doing something wrong ?
>
> my system:
> Linux stan 2.6.22-gentoo-r1 #1 SMP PREEMPT Fri Jul 13 21:06:48 CEST
> 2007 i686 Intel(R) Xeon(TM) CPU 3.06GHz GenuineIntel GNU/Linux
>
> drbd version: Version: 8.0.5 (api:86)
>
> LVM version: 2.02.09 (2006-08-17)
> Library version: 1.02.19 (2007-04-27)
> Driver version: 4.11.0
>
> My config:
>
> resource mirror0 {
> protocol A;
> # tried protocol C and B as well normally used C but thought
> # perhaps this would help
> startup {
> }
> disk {
> on-io-error detach;
> # tried pass_on as well
> }
> net {
> }
> syncer {
> rate 100M;
> al-extents 257;
> }
> on stan {
> device /dev/drbd0;
> disk /dev/vg0/lv1;
> address 192.168.1.101:7788;
> meta-disk internal;
> }
> on game01 {
> device /dev/drbd0;
> disk /dev/vg0/lv1;
> address 192.168.1.102:7788;
> meta-disk internal;
> }
> }
>
> This problem first became apparent when trying to setup an volume in
> stand-alone mode as the other node could not be rebooted atm I figured
> I could configure one node and get the other one involved at an
> appropriate time, further testing showed the problem with the existing
> mirror as well (seems logical).
>
> Sure hope I can resolve this issue as this only causes problems
> instead of preventing them.
>
> Regards,
>
> Mark
>
>
>
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>
--
==============================================
Francesco Ciocchetti (francesco.ciocchetti at kyneste.com)
Network & Security
Kyneste - Piattaforme ICT
"Società appartenente al Gruppo UniCredit e sottoposta
all'attività di Direzione e Coordinamento di UniCredit S.p.A."
Via Mario Bianchini 68, 00142 Roma
T.[+39] 06.98402.1 F. [+39] 06.98402.300
http://www.kyneste.com/
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