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    CPU Type "EPYC Milan" kvm: warning: host doesn't support requested feature

    Hi @all, we have a node with AMD EPYC 7343 running on 7.3-6 and tried to configure a VM with CPU Type "EPYC Milan". Unfortunately this does not work as I get at start of the VM the following error: kvm: warning: host doesn't support requested feature: CPUID.07H:EBX.erms [bit 9] kvm: warning...
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    PBS backup pool performance issues

    Hi@all, I do have a problem with my newly setup PBS with the performance of pools. We have two clusters with both 20 nodes. Every cluster is backing up to the PBS on a separate pool of 12 disks. The performance of the pools is quite bad in zfs. On our intial test with some windows software...
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    Cluster wide Backup delay per node

    Hi, I configured in Datacenter/Backups a 20 node cluster to do backups to PBS. Unfortunately all the nodes start backing up at the same time, which causes a very high IO on the PBS and leads to timeouts of backups. Any idea how to delay this or to setup that the nodes to the backups one by one...
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    Weird Cluster bandwidth behavior

    Hi @ all, yesterday we had a pretty weird behaviour of our 25 node cluster. I did two things that seem to broke the whole cluster. 1) Started a live zfs migration form a node with a 6.1-x version to a 6.2-x node. 2) Installed in the meantime a new node and added it to the cluster (cause I...
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    Epyc Zen 2 with Proxmox 5.4-13

    Hi all, I was wondering if there are any compatibility issues with Proxmox 5.4-13 (kernel 4.15.18-20-pve) and the new Zen 2 architecture with the EPYC lineup. Specifically the new EPYC 7402P. Is somebody already using such a setup, and if so, are there any other issues? Regards, Andy
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    error with cfs lock on zfs filesystem because of timout

    Hi @all, I am facing actually a problem where I am not able to create a iscis-zfs disk because the "cfs lock" gets an timeout. The problem that "zfs list" takes very long on my iscis server, because it has a lot of writes. Is it possible somehow to higher this wait-time so that we get no...
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    Cluster Join failed - help please

    Hi@all, I did tried to add a "reinstalled" node to a cluster with "pvecm add 10.1.1.1" what stopped in "waiting for quorum". As 15 nodes are allready runningn on that cluster, and this node which I wanted to add now, was already minutes before in that cluster, I think the problem was not...
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    Passthrough of Cores and Threads

    Hi all, can I pass all cores and threads to a Virtual Machine? So that the machine has for example all 8 cores and all 16 threads of the node. Purpose for this is licensing. Thanks in advance for answering. Regards, Andreas
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    pve-zsync and "ZFS over iscsi" storage

    Hi @ all, when trying to backup a VMs disk with pve-zsync that is located at a "ZFS over iscsi" storage, I am getting "ERROR: in path". Is it possible that this does not work with "ZFS over iscsi" storages? Regards Andreas
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    [SOLVED] VM shutdown restults in timeout

    Hi everyone, I have a problem with VM shutdowns, specificaly Windows Server 2016 VMs. When I use the shutdown button in the Web UI, sometimes Server 2016 shuts down without issue, but other times Proxmox gets Error "TASK ERROR: VM quit/powerdown failed - got timeout". After following this wiki...
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    ISCSI LIO targetcli no config after reboot

    Hi @ all, I am expiriencing the problem that targetcli is not reloading the saved configuration in "/etc/rtslib-fb-target/saveconfig.json" after a reboot. So always after a reboot you need to do the command: targetctl restore /etc/rtslib-fb-target/saveconfig.json In the man page of targetcli...
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    zvol blocked

    Hi @ all, I expirienced a total freez of an machine a few days ago. Only a reboot helped and then the machine was running again. I do have arrount 10 of the same machines which are running since an year without any problem, and now wondering what has caused the total freeze of this one machine...
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    zfs vol size on backup server bigger then on node??

    Hello @ all, I did tested now pve-zsync to make some backups on my new backup server but have problems with understanding the used space of the volume backup. Here the config of the node: NAME PROPERTY VALUE SOURCE rpool size...
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    pve-zsync -limit (default value)?

    Hi @ all, is there a default "limit" value set in pve-zsync when I do not add the option "-limit"? Because the transfer somehow seems to be limited to 1GB, even if I did not setup lo "limit" option. Regards
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    [SOLVED] Proxmox "apt upgrade" restart needed?

    Hi @ all, I am asking myself when a server really needs a restart after a "apt update & apt upgrade & apt dist-upgrade"? For example having a server with version pve-manager/5.3-5/97ae681d (running kernel: 4.15.18-9-pve) Ok sure if I upgrade the kernel to the newest "4.15.18-10-pve" I would...
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    KVM Page Cache vs Proxmox ARC

    Hi @ all, I am experimenting with KVM Linux Guests (Debian) and asking myself if it really makes sense to have Linux guest OS use Page Cache at all? Because, as I understand, ARC should do the exactly same stuff directly on the node, right? But how to disable it at all in the guest, as sysctl...
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    qm migrate --online --with-local-disks -> is copying block level

    Hello @ all, I am wondering if it is really nececerry to use block-level copying on "qm migrate --online --with-local-disks"? Because having volumes with 400GB for example and only a couple of gigs are used inside (thin provisioning), takes of course long to copy on block-level instead copying...
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    qm migrate -> deletes pve-zsync zfs snapshots

    Hello @ all, we are experimenting with the zfs live migration and have recognized that the migration to another node, will delete all the existing pve-zsync zfs snapshots. So that on the next backup pve-zsync will fail. Any idea if there is a option to kepp the snapshots on live migration...
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    zfs send <-> recv iniciated by the receiver

    Hello@all, I would like to do a root@sendserver:~# zfs send rpool/data/vm-100-disk-0 | ssh recvserver zfs recv rpool/data/vm-100-disk-0 But i need to run that from the receiver site, so I tried root@recserver:~# zfs recv rpool/data/vm-100-disk-0 | ssh sendserver zfs send...
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    ZFS SSD Pool with NVMe Cache (ZIL & L2ARC)

    Hi @ all, we are planning actually our new Proxmox Servers and therefore think about the best performing and cost efficient setup. Now we are a bit stuck at using ZIL and L2ARC on separate devices. Here our actual planed setup: Xeon 6134 Gold 254GB ECC DDR4 RAM 2 x 60GB SSD SATA - mdadm Raid...

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