Recent content by melanch0lia

I want to say that native ZFS on Oracle Solaris works much faster than Linux ZFS. That's why I say that ZFS on Linux is not ready yet as production storage. Also BTRFS in terms of speed can be more likely equal compared to ext4+RAW. And you can disable whole bunch of that features - ZoL will be...

I'm talking about LOCAL target/storage. Just compare benchmarks RAW+ext4 with ZFS on same hardware. ZFS will be much slower and there's nothing you can do with that - there's tons of complaints on official ZoL tracker (github.com/zfsonlinux) and devs have not focused yet on that problems. +...

It won't help, ZFS is not ready for production VM storage.

LVM Thin + ext4 + QCOW2 with cache=writeback: is it bad idea?

In terms of performance?

@mir Thanks. @LnxBil yeah, I mean discard=on on PVE. @melanch0lia VM 10+ means more than 10 VMs regardless of the load. I don't have any big iowait as well (0-8% depending on load) and load average 2-5, but I have some peaks to 7-10 while I'm doing dd and something else or just booting up...

Thanks. This should be in official wiki. Small question - pve-zsync creates snapshots itself? I currently use zfs-auto-snapshot https://github.com/zfsonlinux/zfs-auto-snapshot/blob/master/src/zfs-auto-snapshot.sh Will pve-zsync create snapshot if it will not reach other host/fail to replicate...

Plain VirtIO # fio --description="Emulation of Intel IOmeter File Server Access Pattern" --name=iometer --bssplit=512/10:1k/5:2k/5:4k/60:8k/2:16k/4:32k/4:64k/10 --rw=randrw --rwmixread=80 --direct=1 --size=4g --ioengine=libaio --iodepth=8 iometer: (g=0): rw=randrw, bs=512-64K/512-64K/512-64K...

More details please

Also, should cache=writeback and discard=on be used with ZVOL?

Hello, What is pve-zsync usage in real world? Can somebody show off real scheme of usage between two hosts, including crontab?

Hello, Guys, share your average "Load Average" or iowait on production host with ZFS (ZVOL) as storage for 10+ VMs? Also, what "Load Average" should be considered as critical or problematic?..

Reverting to 2.6.32-39-pve from 2.6.32-41-pve fixes the problem. Couldn't even think that this is related. Repeatedly reproduced on two separate Proxmox VEs. The only changes I see: pve-kernel-2.6.32 (2.6.32-164) unstable; urgency=low * update to latest stable...

Remark: VLAN is configured INSIDE linux guests, not in host Debian. Hello, Linux host 2.6.32-41-pve #1 SMP Sat Sep 12 13:10:00 CEST 2015 x86_64 GNU/Linux pve-manager/3.4-11/6502936f (running kernel: 2.6.32-41-pve) After latest apt-get upgrade stopped working VLAN tagged network inside KVM...

Hm, probably, you're right. What is recommended average CAP to keep? :)