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Hey @aaron Thanks for your feedback, I updated the initial post with the results. Best regards Patrick

Hi there On my SSD servers, the SSD performance is really bad. I test the performance with dd if=/dev/zero of=test.img bs=4k count=262133 conv=fdatasync (I'm aware that dd is not the best tool to test performance) System 1 (SSD + ZFS & RAID1) SuperMicro E300-8D 32 GB RAM 1x Samsung SSD 860...

Ah, found out there's "trunks=" in the vm config. An implementation in the webinterface would be nice :-)

A feature to tag only selected vlans on the vm's interface would be very useful (at the moment it's either one untagged or all tagged). Is such thing planned?

Update I have replaced all disks (3 year old WD RE) with brand new WD Gold and I think the performance increased. Without any cache I'm reaching 100-150 MB/s in a vm, FSYNC on the host is now 5 times more than before the change.

Thanks for your answer In the meantime I found out VMs are reaching 200MB/s if I enable writeback cache. And the LVM on the host is using writeback too. So I think the performance is bad on both the host & guests without any caching. I'm using the folowing setup: LVM -> LUKS -> MDRAID -> HDDs

Unfortunately the server is in production and at the moment I don't see a possibility to test ZFS.

The problem is the server only has 4 slots which are all used, so SSD is not possible. Also, I don't see any possibility for Full Disk Encryption with ZFS. Also it's strange that the host has good performance.

I understand. But are you sure the problem is caused by the RAID? On the host I get good performance, the problem exists only in virtual machines.

Linux mdraid

Just filled up the disk of one VM up to 100% and ran the dd again. Now it's around 80-90MB/s, but in my opinion that's still too slow. Another problem is a windows VM is freezing all the time e.g. if I open the taskmanager. As soon as it's opened, I see 100% disk usage with some 500kb/s :O

Thanks for your fast reply. The guest uses ext4. UUID={UUID} / ext4 errors=remount-ro 0 1 I use fstrim/discard to clean up unused space. Will try with a non-lvm-thin vm later. But I cannot believe the difference uf 150 MB/s.

Hi there Currently I have some performance problems in VMs runnung on my ProxMox node. Specs of the node: - 1x Xeon E5-2620v4 - 64 GB RAM - 4x 1TB WD Gold - Software RAID 10 - Full Disk Encryption - LVM Thin for VMs On the host, I get around 200MB/s: (zrh1)root@vms1:~# dd if=/dev/zero...

I don't even have IPv6 addresses in the master config.

Done: https://bugzilla.proxmox.com/show_bug.cgi?id=1636

I think that's not an intention, but a bug.

Found out the following: I need to manually run postmap /etc/pmg/domains on the slave (not needed on master). I think that should be done automatically.

Hi there I just set up a ProxMox Mail Gateway Cluster. Sync works, Transport/Domains are set up. Now my problem is that the master accepts mails, but not the slave: "Relay access denied". I had a short look on main.cf & /etc/pmg/domains, looks fine. Any ideas? Best regards Patrick

Thanks - looks like it's working :-)

Hi there I'm trying to set up outbound mail relaying with IPv6. I added the network under Configuration->Mail Proxy->Networks (example: 2001:db8::/32). But relaying over IPv6 is not possible: Jan 25 22:38:35 mx1 postfix/smtpd[3779]: warning: 2001:db8::/32 is unavailable. unsupported...