Hello,
For a database under Ubuntu-VM, I need to read/write a lot of data (my other open-topic: VirtIO mode disk crashes the Ubuntu VM). The performance is sluggish, measured with fio like 23MBps read and 8MBps write. And yes, it behaves sluggish as well, it's not a 'fio' issue.
My pool contains only mechanical disks: 8 x 3TB, with no SSD for ZIL and no L2ARC. The FreeNAS attached through a gigabit cable gives me on LAN good 120MBps through SAMBA, so I'm wondering what's wrong here.
I've tried also iSCSI: read 3MBps, write 1MBps.. Totally unusable..
Everything local on the same machine, FreeNAS, disks. No other virtualization etc. Very latest FreeNAS/Ubuntu everything.
My config:
FreeNAS-11.3-U2
Supermicro X11SSL-CF
Xeon(R) CPU E3-1240 v5 @ 3.50GHz
64GB RAM
Tunables: vfs.zfs.arc_max=30G (to have more for the VM)
Any ideas why the VM disk/iSCSI performance sucks this bad?
Thank you
For a database under Ubuntu-VM, I need to read/write a lot of data (my other open-topic: VirtIO mode disk crashes the Ubuntu VM). The performance is sluggish, measured with fio like 23MBps read and 8MBps write. And yes, it behaves sluggish as well, it's not a 'fio' issue.
My pool contains only mechanical disks: 8 x 3TB, with no SSD for ZIL and no L2ARC. The FreeNAS attached through a gigabit cable gives me on LAN good 120MBps through SAMBA, so I'm wondering what's wrong here.
I've tried also iSCSI: read 3MBps, write 1MBps.. Totally unusable..
Everything local on the same machine, FreeNAS, disks. No other virtualization etc. Very latest FreeNAS/Ubuntu everything.
My config:
FreeNAS-11.3-U2
Supermicro X11SSL-CF
Xeon(R) CPU E3-1240 v5 @ 3.50GHz
64GB RAM
Tunables: vfs.zfs.arc_max=30G (to have more for the VM)
Any ideas why the VM disk/iSCSI performance sucks this bad?
Thank you
