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I've done more research. Setup 5 more boxes to test with. Same results. Either with default Proxmox ISO and also via manual installation. Same result. Using VMs makes KVM/QEMU create _way_ too much IO-Threads. Can any Proxmox-Staff please join the discussion here? Update: IDE-Driver does _NOT_...

This bug is most probably kvm-related due to patches from Proxmox team. I'm currently analysing the changes they've made to the original upstream. Regarding your question: Results: .raw-images seem to work lvm-thin is affected by this bug lvm-thick is affected by this bug

Sure: bootdisk: scsi0 cores: 2 cpu: host ide2: none,media=cdrom memory: 8192 name: test net0: virtio=02:00:00:4b:d6:59,bridge=vmbr0 numa: 0 ostype: l26 scsi0: vm:vm-100-disk-1,size=32G,scsiblock=1 scsihw: virtio-scsi-pci smbios1: uuid=496b88cf-74f9-4078-87e3-b99247c609e1 sockets: 1 same with...

Bug filed, confirmed on our production-cluster with enterprise support and hardware-raid-1 (Proxmox 4.4) without encryption. This didnt came to our attention yet, because we only run a few VMs on it yet and its SSD-backed. Same situation, massive load on the host once a VM does IO-Load, no...

Here you got a video.

Okay i couldnt let this go so i kept digging and here is what i've found. I was curious why for gods sake my hypervisor with Proxmox made 100% CPU-load on all 8 cores when a VM is write-intensive while without Proxmox and going for libvirt+kvm is totally fine. IOtop gave the difference...

Searching the forums for 1 day now led me to this thread: https://forum.proxmox.com/threads/performance-issue-with-proxmox-4-high-io-delay.26012 where people suggesting barrior problems with ext4. This makes no sense as LXC works fine and mounting the volume on the host-node works fine either...

Another test revealed, that LXC are fine and i'm getting near-host-speed aswell. So the problem exists only when using KVM. All tests were made on the exact same PV/LV-Pool

Out of curiosity i took the LV of my Proxmox VM, formatted it with ext4 and mounted it on the host. Tested the speed and had perfect fine performance, like without Proxmox. So its definitly not the filesystem itself which makes CPU go to 100%. Again, there has to be something wrong on Proxmox side.

Hey guys, Despite beeing an enterprise customer with dozens of machines, i've tried to replicate a setup we run from time to time: Enterprise Hardware Xeon 1650v2 4x 2 TB SATA Softraid 10-F2 LUKS Full-Encryption Using standalone setups our VMs achive same performance as our hosts using...

Okay, we found the problem after 1+ week of digging into our core routers. The problem was indeed the MPLS-Tunnel. We've had turned everything off, IGMP-Snooping, any flow controls so essentially everything which is not absolutely necessary to run our network at this point. So then, problems...

Haha, good idea with the "long term test". I think we got the proof that some of our network equipment has a malfunction (although IGMP-Snooping and everything is definitly turned off): P.S.: Unicast is no option because we plan to expand our cluster to 20+ Nodes. From .40 192.168.41.39 ...

I've set it up exactly as u said so. Including ring0 attributes :) Both times! I dont overwrite the hostname, because im using the original one with -CS attached to it, so two hostnames, one for Management and one for corosync, i think this should be sufficient. Did you read my update? The...

Thanks for the update. So because i couldnt get any errors i've decided to resetup the whole cluster. (I show here the status after setting up 3 hosts in 3 different datacenters with MPLS-Links) 1.) In the previous setup we've went with IPs instead of hostnames for corosync, now we go by...

Latency like 0.003ms. ATM the box is in the same datacenter and should be put into another one which has a latency of 0.007ms (a few km away). I can ping Management-Interface (Proxmox IP) and also Corosync IP from and to all hosts of the cluster, so thats why expect the network to be setup...

To be clear, its still not working :)

Everything works as expected. Multicast, IP, TCP/UDP, everything.

Hey Jonas, already tested that prior to my post and indeed its working. Thats what makes me so curious why its not working.

Hey guys, here is a tricky one: We've setup a proxmox (4.4) cluster of 14 machines and wanted to join more servers into it. Cluster is running fine, there is no problem at all. The new servers got linked into the very same VLAN where the current running Cluster is operating in. Difference: The...

I did, countless times, no success. Thats why i raised the question.