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  1. UdoB

    2 Nodes Cluster - Help :(

    (( pve1 has two votes; pve2 has one. )) What do you think happens when his "pve1" dies? "pve2" is not usable in that case. (Not without some manual intervention for troubleshooting.) That's just not what I would call a working cluster! But yeah, under some circumstances you can fake several...
  2. UdoB

    2 Nodes Cluster - Help :(

    This! And yes. Yes! Without Quorum you can not administrate the single surviving node. (There are workaround for troubleshooting, but not for continuous use.) Do not think about Ceph before reading this: https://forum.proxmox.com/threads/fabu-can-i-use-ceph-in-a-_very_-small-cluster.159671/
  3. UdoB

    advanced tips and tricks for extreme storage saving?

    ZFS can utilize several algorithms. I do not play with them, I just use the default. But to squeeze out some percent: ~# zfs set compression=thisdoesnotexist rpool/dummy cannot set property for 'rpool/dummy': 'compression' must be one of 'on | off | lzjb | gzip | gzip-[1-9] | zle | lz4 | zstd...
  4. UdoB

    ⅓ des HA-Clusters ausgefallen, /etc/pve unvollständig

    Da sieht man dann aber leider nur die VM-IDs, nicht die sprechenden Namen...
  5. UdoB

    subcription license inquiry

    Ceph is not a separate product. You buy subscriptions for PVE (and PBS/PMG...) Ceph runs atop an existing PVE - at least here, in our Proxmox context.
  6. UdoB

    subcription license inquiry

    There is an FAQ entry somewhere on https://shop.proxmox.com/ ... ... --> https://shop.proxmox.com/index.php?rp=/knowledgebase/5/How-many-subscriptions-do-I-need-for-my-servers.html Basically you need a subscription for each and every CPU registered in that cluster to get a clean state.
  7. UdoB

    Ceph Storage question

    Does it? With the failure domain being "host" this does not make sense...? I am definitely NOT a Ceph expert, but now I am interested in the actual behavior: I have a small, virtual Test-Cluster with Ceph. For the following tests three Nodes have two OSDs each. Please ignore the "emtpy" ones...
  8. UdoB

    Proxmox 9 friert dauernd ein

    Gehen wir mittlerweile davon aus, dass jeder Neuling im Proxmoxbereich jene Mechanismen nutzt? Kann sein. Aber ehrlich... ein paar generische ;-) Zeilen zuviel stören dich???
  9. UdoB

    Proxmox 9 friert dauernd ein

    Leute, "das Gefühl" gibt uns rein gar keine Information, auf die wir sinnvoll -möglicherweise sogar hilfreich- antworten könnten! Kannst du #2 adaptieren?
  10. UdoB

    Proxmox 9 friert dauernd ein

    Ärgerlich! Hinweise sollten sich im Journal finden lassen. "Sollten" weil es immer wieder Fälle gibt, in denen das Journal tatsächlich nicht weiterhilft. Dennoch ist es die erste Anlaufstelle! man journalctl hilft. Wenn die Kiste jetzt normal läuft und der vorherige Neustart eine Überraschung...
  11. UdoB

    Proxmox Checkscript

    Haven't tested it yet, but will do :-)
  12. UdoB

    Best practice setup for Proxmox Backup Server and NAS on the same Node

    There are a multitude of ways to run PBS. The recommended way is -of course- to use separate/independent hardware with SSDs only. Whatever compromise you implement on a single hardware host: think carefully about the situation when that hardware dies. ((( What I do in my homelab is to utilize...
  13. UdoB

    Datenaustausch zwischen virtuellen Maschinen

    Ich kann das nicht bestätigen, weil ich es noch nicht probiert habe :-) Aber... für den Datenaustausch zwischen mehreren VMs scheint mir das nicht gedacht zu sein - eher für host <--> VM. Vermutlich muss die eine VM1 erst Dateien dorthin abspeichern, damit sie anschließend in VM2 sichtbar...
  14. UdoB

    Moving old backups to HDD

    Well..., you are using a lot of partition magic - basically that's what I do not like to recommend. I know it works and I did do that too sometimes. But it complicates things massively. Especially for a "normal user": when a physical device fails it is already complicated enough to replace a...
  15. UdoB

    Suggestion about hardware

    For learning Ceph this is fine. Ceph is a complex beast and the actual behavior depends on several details. If there are enough nodes available... nothing happens if one node has a (single?) smaller OSD. If you activate only three nodes and use the default rules (size=3) the whole system gets...
  16. UdoB

    Suggestion about hardware

    No! It may be recommended to avoid "surprising behavior"... Note that a Ceph cluster with only HDDs is not state-of-the-art anymore and you need some bandwidth for it to be useful - 10 GBit/s is the recommended minimum. Some more hints from my Homelab...
  17. UdoB

    Suggestion about hardware

    I am with @guruevi ; for the AMD system I would recommend to add some more disks (HDDs plus two small but high quality SSDs for a Special Device) and install a PBS. Backups from the beginning are often an oversight...
  18. UdoB

    Moving old backups to HDD

    You can have only one solution: either build two independent pools or have a Special Device. For rotating rust I do really, really, really recommend having a Special Device. What I would not do is to install the OS on a non-redundant device. This leads to my personally preferred construct for...
  19. UdoB

    Proxmox runs out of memory if not restarted once a month

    You should not overcommit RAM. It just does not work well. If you need to relax that problem a little bit you may look at zram; I prefer this over a static swap-file: ~# apt show zram-tools Description: utilities for working with zram zram is a Linux kernel module that allows you to set up...
  20. UdoB

    Pool size different? Overhead?

    That's another FAQ, definitely. The first is the 8*8=64 TB your devices bring into the game. You have configured a RaidZ2, so two of those are used for redundancy. This leaves 8*6=48 TB, theoretically. From 48 down to 45.37 is not really far, is it? This difference is actual overhead and...