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  1. Looking for suggestions for a ZFS server that can have ssd and nvme and local high capacity (for backup) storage

    Forgive my ignorance in "high level hardware" but I've only experience with my "self made" Proxmox server at home and I've been asked by a friend that runs a small IT business about a Proxmox server for his customers. My idea is that I will boot from 2 ZFS raid1 small DC Sata SSD, have a VM...
  2. Headless server, how to boot with previous kernel?

    Hi, my home proxmox "server" is headless and does not have any IPMI console. I need to boot it with previous kernel, but if I try to remove the last one as suggested in this thread https://forum.proxmox.com/threads/changing-selected-kernel-for-boot-systemd-boot-on-headless-pve-host.59593/ it...
  3. News: Linux KVM Virtualization Had Mistakenly Been Applying L1TF Workaround To Unaffected CPUs (AMD)

    https://www.phoronix.com/scan.php?page=news_item&px=KVM-L1TF-Whoops Maybe some Proxmox dev can take care of this issue.
  4. How to crash the server playing with VM CPU configuration... is it normal?

    Hi, I've a vm (Kubuntu 19.04) that I use to test Freecad and that I turn on when needed. I've no need of "mitigations" about CPU flaws or whatever, I just need more performance I can. In the vm I've disabled all CPU flags (-md-clear;-pcid;-spec-ctrl;-ssbd;-ibpb;-virt-ssbd;-amd-ssbd;-amd-no-ssb)...
  5. corosync totem retransmit and cluster problem

    In a 3 node cluster, 2 with drbd9 storage and one for quorum, I've 4-5 times a day corosync problems like those below. Sometime I enter the web GUI and I see the other nodes in red, pvecm status says is everything ok, but if I dare run the command i.e. "qm list" it hangs and there is no way to...
  6. Ceph on PVE5 test cluster dubts and problems

    Hi, I'm testing Proxmox 5 (latest updates) and it's Ceph (luminous). I've 3 VM with Proxmox installed, 2 as storage with 32GB virtual disk each, and the 3° only with local storage as 3° monitor. I've followed instructions on https://pve.proxmox.com/wiki/Ceph_Server and some googling around I've...
  7. Proxmox 5 beta, Areca 1883i, 10x LESS Fsync/Sec vs 4.x

    I've a new server where I've installed an Areca RAID controller 1883i, 4 x 1TB RAID10 WD Enterprise Gold and 2 x 2TB RAID1 WD Enterprise Gold. The controller has a "supercap" and Write Back cache enabled, raid has been initialized this night. With Proxmox 4 the same controller with 4x500GB...
  8. How upgrade a 3 node, 2 node storage, drbd9

    I've a 3 node cluster (but only 2 node storage) with enterprise repo and drbdmanage 0.91-1, so I think I'd better upgrade now (also hoping 0.97.3-1 will fix some issues about calculated free space) since the license change and waiting to things to clarify (and in the future avoid the...
  9. Win10 Spice not working

    Hi, I've a Kubuntu 16.04 vm and spice works fine (I've "Use tablet for pointer" Yes, "Qemu agent" Yes, Display "Spice (qlx)" and in the guest I've installed spice-vdagent). But when I try to set spice on Windows 10 pro (or even Win7), the mouse keeps being grabbed and is not precise/does not...
  10. Anyone using raid controller Areca ARC-1883i ?

    Hi, the above controller looks very interesting, especially with the Flash Base Module as "permanent" BBU and the possibility to be configured from LAN. In the wiki I've found that the line ARC-1210, ARC-1212 and ARC-1222 works but nothing about the above one. Anyone has experience? Works fine...
  11. drbd9 replication is not thin on replicated node

    Hi, prox 4.1 (enterprise), 3 node cluster with 2 node with drbd9 thin provisioned storage (package thin-provisioning-tools installed in both nodes). I've created a 400GB second disk on node1, and since is empty at the moment, I see "data% 0.05" with lvs. But if I go on the second node, I see...
  12. restored vm on thin provisioned drbd9 storage is no more "thin"

    Hi, I've prox 4.1 (enterprise repo) and drbd9 cluster with thin provisioning enabled. I've seen that if I create a VM in drbd9 storage is correctly thin provisioned, but if I restore the VM then 100% (almost) of the space is alloccated. i.e. I've backedup VM 108 and restored as VM 999, and lvs...
  13. Impossible delete qcow2 snapshot because 'device not found'

    Hi, I tested with a VM (qcow2 image file format) and took at snapshot at "stage 0" before trying to install paravirt (virtio) drivers, so disk was IDE and not, after snapshot, is Virtio. Since everything works fine and the snapshot is no more needed, I tried to delete it from GUI, but got the...
  14. drbd9, sync new resource after node disconnection

    Hi, I've 2 nodes with drbd9 storage in a 3 node cluster, linked with a cross cable 10GB/s on nic card. I've noticed that if I disconnect the cable, and create a VM in one node, when I re-plug the cable the new "resource", i.e. "vm-106-disk-1", it's not replicated. drbdsetup status shows it only...
  15. DRBD9, how create a test block device for dd speed test?

    Hi, I'm newbie of DRBD9 and I'm using with Proxmox 4.1, storage on 2 nodes out of 3. I would like to follow the "optimizing performance" tests here http://drbd.linbit.com/users-guide-9.0/p-performance.html. Instead of sacrify a VM disk (i.e. TEST_RESOURCE=vm-100-disk-1), I would love to be able...
  16. ZFS and high iowait / server load

    Hi, I've a i5 4590 CPU, 16GB ram, 2x1TB velociraptor as Raid1, a Intel 3710 200GB as zil (16GB) and L2ARC (110GB). Arc RAM is limited to 4GB since I've not too much. When I start a VM, the server load skyrockets to > 30-40, I've 3 VMs and I had to start one after the other, because if they start...
  17. How to disable KSM?

    Hi, I want to save CPU cycles and disable KSM, also because I've VMs that are all different. I've tried: /etc/default/ksmtuned and put START=no reboot, but no luck Then I also added to /etc/ksmtuned.conf the parameter KSM_ENABLED=0 but I see it's used (in the summary of GUI or with cat...
  18. Prox4 and drbd, Raid card and 2 SSD, which way is best for volume creation? TRIM?

    Hi, as far as I understand drbd9 is over lvm, and I have 2 SSD disks on each server, that I need to "sum" to have their total capacity. I will have an Adaptec 6805e raid controller. The question is: is better create a raid0 with sdb+sdc at controller level, or create two separate raid0 disks...
  19. Anyone using Thecus Zub NAS C10GTR 10GBE Card? Suggestions?

    I want to use this ethernet nic to connect 10Gbit 2 node with drbd (and 3° node for quorum) since is much cheaper than Intel ones, but wondering if it works. Any experience? Reliable alternatives? Thanks in advance
  20. Proxmox 4.0, ZFS: Failed to boot cannot import rpool: wrong timing or something miss?

    I've a problem similar to the one here: http://forum.proxmox.com/threads/23813-Proxmox-4-0-Failed-to-boot-after-zfs-install-cannot-import-rpool-no-such-pool but for me is NOT due to some RAID metadata still present (I've zeroed the entire disk and also tried with a disk brand new) and that's why...

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