[PVE-User] Constant crashes with high IO load from FreeBSD guests

Glenn Kelley glenn at vinehosting.com
Mon Jan 3 20:27:24 CET 2011

i have an x2100 and cannot duplicate this 
sorry - meant to mention that in the list - in fact thought i did - but who knows may not have hit the send ... 

On Jan 3, 2011, at 2:21 PM, Myke G wrote:

> *Bump*
> On 2010-12-28 13:30, Myke G wrote:
>> On 2010-12-28 13:24, Myke G wrote:
>>> If the guest fires up a tar of / or a particularly large ./configure of something, eventually, within seconds to minutes, the Proxmox node hangs. Usually there's no console messages, and I have to use the IPMI interface to reset the machine. (I'm 500KM from the datacenter)
>>> We've tried FreeBSD 7 and 8, with SCSI and IDE, Realtek and Intel NICs... no difference. We've only tried with i386 builds (stock from ISO, and also updated to -STABLE). I've moved the guest around to different nodes in the cluster, and the VM-IO-induced crashing is universal. AFAIK the hardware is fine, the crashes follow this user's workpatterns - which aren't exceptional IMO. We've recreated this instance 4 times now I think.
>> Missed observation:
>> Proxmox's backups are also a fairly consistent trigger.
>> Compressed or not.
>> Local storage (on a second drive) or when it's dumping to an NFS store.
>> I should've mentioned all my guest VMs (KVM or VZ) are running from local storage.
>> I repeat: all the hardware SEEMS fine, the Proxmox crashing follows the workload. (I have several X2200s, I've swapped out the machines during this time too)
>> I wrote a few weeks ago about how (snapshot) backups were making FreeBSD guests become stopped. It seems related, but again, no logs or any useful information I can glean.
> I know it's the tail end of holidays here, but I was wondering if anyone had had any ideas or suggestions? I still have no useful/aberrant information from the logs.
> Myke
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