[DRBD-user] write performance solved.... kinda, now kvm machines need help

Zev Weiss zweiss at scout.wisc.edu
Fri Jul 29 01:39:13 CEST 2011

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

On Jul 28, 2011, at 2:19 PM, listslut at outofoptions.net wrote:

> Linux version 2.6.18-274.el5  
> (mockbuild at x86-002.build.bos.redhat.com) (gcc version 4.1.2 20080704  
> (Red Hat 4.1.2-51)) #1 SMP Fri Jul 8 17:36:59 EDT 2011
> [root at thing1 ~]# cat /etc/redhat-release
> Red Hat Enterprise Linux Server release 5.6 (Tikanga)
> I upgraded to drbd 8.4.  I went over my configs and added just about  
> every tweak I could.  I got around 90M/s on sync ups and around 60M/ 
> s otherwise using LVM/GFS2.
> I thought life was good. I now get 0.5M with KVM's.   My Redhat  
> kickstart disk wouldn't even complete an install without some  
> error.  I'm installing Fedora 14 now from disk and it is going but  
> very slowly.  It is using the Virtio disk driver.  Anyone have any  
> advice on where I should look for more info on this?
> Thanks
> Ken Lowther

Good to hear, thanks.  Did you run any intermediate tests, e.g. with  
8.4 but an unchanged config, to see how each change affected things?   
Also, what configuration changes did you make?


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