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Thanks, but this is nothing I would like to run on a host in production. Would be great if libguestfs comes from the PVE repo in a working version.

Would be interesting to get a short report after that :-)

Works fine here with PVE 4. Speed depends on you network layout and number of replicas. With dedicated 1000M we have ~70MB/s write speed, which is quite good. Reading is almost as fast as from local storage, because reads are local. DRBB 9 is stable, see https://www.linbit.com/en/p/products/drbd9

What about DRBD9?

Yes, "3.16.0-0.bpo.4-amd64" from wheezy-backports directly on the PVE host (HP DL180gen9). 2 month without any VM freeze.

You missed the point to use the backported kernel on the PVE host, NOT an your VMs.

Yes, use Kernel 3.16 from Debian backports. We're running a few Haswell nodes since 2 month without any problems with this kernel. Before we had daily VM freezes. This works only for KVM, OpenVZ ist not included in this kernel. If you're on OpenVZ, there is no fix afaik. :(

You have to increase the kernel conntrack table size (see /proc/sys/net/ipv4/netfilter/ip_conntrack_max) or change your iptables settings to not use "state" rules.

DL160gen9 works with blacklisted module, FYI.

Thanks, worked :-)

Hi, we've got a 3 node PVE 4 (latest tools/updates) cluster with DRBD 9. When cloning a VM, the state is always "Outd" on the 3rd node as follows: 102:vm-123-disk-1/0 Connected(3*) Seco(node1,node3)/Prim(node2) UpTo(node3)/Outd(node1)/UpTo(node2) On the other 2 nodes everything is ok (UpTo)...

Sure, we're using Intel® SSD DC S3700 Series (SSDSC2BA20) right now and it works like a charme :) Details: http://ark.intel.com/products/71914/Intel-SSD-DC-S3700-Series-200GB-2_5in-SATA-6Gbs-25nm-MLC

Any chance to get libguestfs (http://libguestfs.org/) working on PVE 4?

Did you try kernel 3.16 We're running this kernel since 3 weeks without any freeze!

What about Kernel 3.10-pve?

Not really. We changed our host kernel to 3.16, so I think the *-pve kernel has some problems with Haswell. As we're running lots of CentOS 7 servers with RHEL stock kernel without problems, it must be a PVE specific problem, maybe in a combination with their qemu packages or something.

Update: No more hangs sincs 10 days with "Wheezy backports 3.16" Kernel on PVE 3.4 with Haswell CPU.

Update: With Intel DC SSDs it works ;)

No, sorry - but we have the same problems and also others, i.e. here: http://forum.proxmox.com/threads/20372-Linux-guest-problems-on-new-Haswell-EP-processors

Do you have a Haswell CPU like E5-2620v3 or something?