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Thanks Tom. I learned this command during the day when trying to understand this problem. The output (now on the latest test kernel 2.6.18 shows that "host" is still not a supported option under that combination of kernel/qemu. Michael kvm -cpu ? x86 qemu64 x86 core2duo x86...

Thanks for your reply Dietmar. No, I have not tried the newer kernel from pvetest. If there is the slightest chance that this will help, I will try that kernel tonight. Thanks, Michael

Running the latest Proxmox version 1.8, I changed from kernel 2.6.32 to 2.6.18 due to rsync performance issues (see: http://forum.proxmox.com/threads/6175-rsync-%28host%29-performance-issues-with-kernel-2.6.32-on-Supermicro-platform) After successful downgrade to that kernel, I now find that VM...

Thanks again to Udo for trying to help. FTR - we have switched to the "Redhat kernel" 2.6.18 and rsync speed (~ 80MB/s) is as expected : Create an 8 GB test file (on the SAS disk): dd if=/dev/zero of=/var/lib/vz/testfile_MDO bs=1024k count=8192 conv=fdatasync rsync --progress...

Yes, all the details in that posting were with SAS and Sata using the controller but we had even done tests at some stage with a Sata disk connected straight to the board and the Adaptec controller completely removed for that time. Sadly the performance was as bad as before. I know, its not for...

Running latest Proxmox 1.8 (we started with 1.7 on that system) we find unbelievable bad performance when using rsync at the host. We are running kernel 2.6.32-4. pveversion -v pve-manager: 1.8-15 (pve-manager/1.8/5754) running kernel: 2.6.32-4-pve proxmox-ve-2.6.32: 1.8-32...

Many Thanks for that feedback. it's hard to believe but we will definitely look at that asap here at our system and will let everyone know the results.

In addition to tekwize's details (my colleague), I have done more testing on this issue (which seems to be an rsync only problem) over the weekend and added details to another performance related post which seems to indicate similar issues...

Hi I am curious whether you have any further results? You seem to suspect the issue caused by the Adaptec 5405 RAID controller and we are also suspicious about an rsync (only) issue in two systems that are using the Adaptec 5405 controllers. My colleague described our problem here...

We have been running a Proxmox 1.7 installation with the latest kernel with 3 (test) KVMs for a few weeks. The nightly backups (0:15 each night) were running onto an NFS share on a standalone CentOS host. This worked well for a few weeks. We then virtualised that CentOS (fresh install of a KVM...

Hi I am new here so please don't shoot at me if this has been answered before and I might have searched wrongly for a solution. We have just started with a Proxmox VE test installation and as a next step, I would like to virtualise an existing "SME server" (a CentOS5 based distribution) into a...