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I'm afraid you don't understand my setup. I am backing up to a separate raid1 array, controlled by a VM. PVE is on a separate raid1 array. In the event of failure, the backup (and user data) drives are accessible individually by any host, apart from PVE. FWIW, I don't really consider them to be...

Is there any information about how this mechanism works? Overlay filesystem perhaps? I'm wondering about a specific configuration that I've created. I have a VM which provides NFS shares to other (local) VMs for storing user data. This data is stored on 2nd and 3rd drives which are accessed...

I haven't been able to determine exactly what's required in order to do a snapshot backup in PVE2.3+. The wiki says "The new KVM live backup is targeted to work for all storage types and eliminates the need for special LVM configurations with enough snapshot space by avoiding the use of...

This appears to be getting worse. I've built a PVE3.0 host, and a Win7 KVM which I migrated from bare iron uses 40% of 2 cpus when it's essentially idle. I've removed some unused Win features on the guest, to no avail. Guest is configured with Virtio drivers for disk and network. I've set...

Boy, do I feel stupid. After checking the logs, it turned out that the power had failed on the outlet where the UPS was plugged in, and the UPS failed (battery dead). In short, the server (and the network device) lost power, then gracefully came back up when power was restored. Somehow I assumed...

I wouldn't have thought this was possible. We're in the process of determining the exact problem with the external network device, but I thought I'd go ahead and see what the experts have to say about this. I have a PVE 2.0.3 host, with an Intel (82571EB) PCIe dual nic card. One of the ports is...

Results aren't encouraging. #1 - with CentOS5 VM (2.6.18 kernel), no noticable change (still ~30% cpu use when idle). With IPCop VM (2.6.32 kernel), it wouldn't boot. Went into a loop loading kernel. #2 - with CentOS5 VM, symptoms were much worse. cpu use was 50-60%. With IPCop VM, also got...

Here is a chart that an associate of mine created which illustrates the scenarios he has tested. Nice bit of work. https://docs.google.com/spreadsheet/ccc?key=0AtGmTsyum5BqdGlBVlpJVm0tR2lwbTdDcnJnSEpSNHc&usp=sharing

I see (said the blind man)! Thanks Tom.

I don't follow the reasoning here. PVE is based on Debian, not RHEL.

Not exactly *the* problem here. The problem here is strictly with KVMs, not openvz containers. BTW, I'm also looking for performance improvements for Windoze KVMs. I have a few win2k3 KVMs that are eating 30% of 2 CPUs just idling (if there is such a thing for Windows machines). Win7 looks...

Upgrading to a 3.2 kernel in the KVMs will likely fix things all right. Problem is, that's not an option in some cases. I'm wondering if there's something I can backport from 3.2 which will fix up 2.6.32 kernels appropriately. RHEL has apparently done this, as COS6 (2.6.32) doesn't have this...

Nope. I have e1000 across the board on other KVMs which exhibit the problem.

I don't actually have any debian 6 hosts that are being used. Just did that for a test. What about other 2.6.32 kernels, and Windows 2k3/2k8 servers?

This KVM is running on 2.1, and uses 2.1% (ironic) of 1 CPU when essentially idle: boot: cd bootdisk: ide0 cores: 1 ide0: local:100/vm-100-disk-1.raw,size=1G ide2: isos:iso/ipcop-2.0.3-install-cd.i486.iso,media=cdrom,size=61768K memory: 128 name: tacs-net net0...

Tried that. Doesn't help. Does screw up the cursor in the console window though. :(

I've noticed a much higher CPU use by some KVMs since upgrading from PVE2.1 to PVE2.2 (and PVE2.3). I suspect that the problem might be related to qemu (1.1.1 on PVE2.1, 1.2.0 on PVE2.2, and 1.4.0 on PVE2.3). KVMs running IPCop (2.6.32 kernel) essentially idle on PVE2.1 use ~3.0% of 1 CPU. A...

Re: kernel: EXT4-fs (dm-3): Unaligned AIO/DIO on inode 130479 by kvm; performance wil Sorry to revive an old topic, but I'd like to a "me too". EXT4-fs (md1): Unaligned AIO/DIO on inode 25690132 by kvm; performance will be poor. I believe this is coming from a Win2k3 guest with IDE drivers...