Search results

  1. G

    PVE 8 pve-firewall status no such alias

    Hello, I installed a new (virtual) PVE 8 instance and created a firewall config with the WebGUI alias a_intern -- 10.10.68.0/24 ip_set s_intern -- a_intern security group g_intern -- ACCESS tcp +s_intern 22,8006 and assigned this group to vmbr0 in a firewall rule: cat...
  2. G

    Error "online storage migration not possible if snapshot exists" on zfspool (bug in QemuMigrate.pm?)

    Hello, could you please look at this enhancement again - we would really, really need this functionality. We just dumped our central Ceph storage (not proxmox Ceph) because of performance and stability issues and switched back to DAS (direct attached storage) - NVMe SSDs and ZFS. With NVMe SSDs...
  3. G

    ZFS zvol on HDD locks up VM

    Yes - very good hint - 128k volblocksize makes a big difference ! I additionally run some fio test inside the VM - the 128k volblocksize fixes the problems on sequential IO (like the tar test above) but does not slow down random read/write tests. the VM stays responsive during the tests the...
  4. G

    ZFS zvol on HDD locks up VM

    I've already created a zvol with 4K volblocksize (8K is the default) - same results. Additionally I run the test on the proxmox host directly created a 4K zvol mkfs.xfs mounted Running the test generated 500-700 IOPs on one HDD and a load of >40 on the proxmox host - like inside the VM The...
  5. G

    ZFS zvol on HDD locks up VM

    Software pve-manager/6.3-3/eee5f901 Linux 5.4.78-2-pve #1 SMP PVE 5.4.78-2 Hardware DL380p Gen8 2x E5-2650 v2 256GB RAM LSI 2308 SAS HBA (IT mode) 4x 4TB SAS HDD (SEAGATE ST4000NM0023,SMEG4000S5 HGST HUS726040AL5210) 2x SATA SSD SAMSUNG 240GB (rpool) 4x SATA SSD Seagate/Intel (Nytro/4610) 480GB...
  6. G

    ZFS zvol on HDD locks up VM

    Repeated the test some more times - the results did not change IOPs to the host raw disk VM behavior proxmox host load ZFS zvol - HDD pool 500-800 completely unresponsive > 40 ZFS zvol - SSD pool 1000-3500 responsive 10-16 ZFS raw image file - HDD pool 60-180 (with pauses) responsive...
  7. G

    ZFS zvol on HDD locks up VM

    What makes me puzzled is not HW RAID vs ZFS zvol - it's ZFS raw image (ZFS dataset hosting a raw image file) vs ZFS zvol. The difference between ZFS raw image and ZFS zvol is way too big - for the same test a zvol generates 20x to 30x the number of IOPs - this quickly fills up even a SATA SSD...
  8. G

    ZFS zvol on HDD locks up VM

    Hello, inside the proxmox GUI I've created a 4 member RAID10 HDD ZFS pool (4T SAS HDDs). I placed a VM disk inside this pool and wanted to copy a big repo from a physical machine to the VM (SCSI disk, discard=on,iothread=1,cache=none) source (physical machine): tar -cpf - repo | mbuffer -s...
  9. G

    ZFS - subvolume for zvol vm disks?

    Thanks for the suggestions - there are indeed some advantages in using more layers in the volume hierarchy . I'll reorder my existing zvols.
  10. G

    ZFS - subvolume for zvol vm disks?

    Hello, I've created a zfs pool (zssd960) with the proxmox GUI After creating some VMs I see the disks of the VMs created as ZFS zvols direct under the ZFS pool the rpool contains a subvol - data - where the zvols are placed should I create a subvol on my pool (zssd960) also? is there an...

About

The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!