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> https://forum.proxmox.com/threads/opt-in-linux-6-8-kernel-for-proxmox-ve-8-available-on-test-no-subscription.144557/post-651341 the reported performance differences of docker inside lxc here is one more reason for me to to NOT use docker inside LXC or recommend doing so.

hello, does anybody know some good site which is benchmarking ssd's for comparison and which provides reliable and good information regarding sustained write capability ? for many many ssd, especially the cheaper ones, sustained write really sucks ...

what makes you think the opetions are not applied? please remove quiet and splash=silent options and try again

did you try how it behaves with a different monitor model ?

sorry, i was too fast and without coffee in the morning. i don't have experience with 440ar, but for sure i can tell p410/420 has issues with hba mode

P440ar in hba mode is a bad idea

@Stoiko Ivanov , mhh, nicht problematisch ? anwendungen sperrt doch aus security gründen in einen chroot und gerade die sollten doch up to date sein !? ich habe hier mal ein bugticket aufgemacht, weil sich mir nicht erschliesst warum das nicht problematisch ist wenn der chroot inhalt veraltet...

>Yes, we know and that's why we expose disabling copy-on-write for data (which is mentioned also as workaround in the linked report), it's currently configurable per storage: https://git.proxmox.com/?p=pve-storage.git;a=commitdiff;h=d3c5cf24876d2b0e1399f717e2f77eaf063ae7a7 ah, good to know...

i opened up a bugreport for this at https://bugzilla.proxmox.com/show_bug.cgi?id=5320

you should check your kernel log / dmesg for errors. i guess your usb connection isn't stable or your usb stick is not reliable . could also be related to powersave settings on usb ports

meanwhile, i have found that there are quirks in action: https://forum.proxmox.com/threads/virtual-disk-default-no-cache-settings-weirdness.143430/ https://pve.proxmox.com/wiki/Storage:_BTRFS "BTRFS will honor the O_DIRECT flag when opening files, meaning VMs should not use cache mode none...

> Setting „Default (No cache)“ seems to be different from setting „No cache“. When „No cache“ is being selected, then cache=none is explicitly added to the process/commandline. apparently, this seems to be only case when the VM/disk is placed on btrfs, i found this quirk in the source, i.e...

When I look at promox virtual disk settings , the default for virtual disk is „Default (No cache)“. The wiki page at https://pve.proxmox.com/wiki/Performance_Tweaks is telling : „cache=none seems to be the best performance and is the default since Proxmox 2.X.“ The file section in the...

via google search for btrfs and o_direct i found this wiki page https://pve.proxmox.com/wiki/Special:WhatLinksHere/Storage:_BTRFS that mentions the folloging important information "BTRFS will honor the O_DIRECT flag when opening files, meaning VMsshould not use cache mode none, otherwise...

the problem with btrfs is that O_DIRECT has issues, see https://bugzilla.redhat.com/show_bug.cgi?id=1914433 for exampe. so, you should not use cache=none for your virtual disks with proxmox https://pve.proxmox.com/wiki/Storage:_BTRFS mentions that, i'm currently trying to find out, where that...

none is wrong, as none measn O_DIRECT, and that has known issues with btrfs

i learned today that csum errors with btrfs can occur if DIRECTIO (ie cache=none) is being used with btrfs. https://bugzilla.redhat.com/show_bug.cgi?id=1914433

i have observed a similar performance issue on zfs shared via samba, unfortunately i'm not yet able to reproduce. when live migrating a qcow2 virtual disk hosted on zfs/samba share to disk to local ssd, i observed pathological slowness and saw lot's of write IOPs on the source (!) whereas i...

there is another bugticket at https://bugzilla.proxmox.com/show_bug.cgi?id=4805, but it has wrong state as "more info needed" does not apply, i have no more info to provide besides the query for obsoleting virtual ide cdrom for freshly created VMs.

what is the recommended or most popular tool to orchestrate/automate vm setup/deployment in proxmox ? what do proxmox customers / hosters use ? terraform? ansible? puppet? vagrant?