Hi Mikhail The guest that is running - what type of controller / cache?
Thanks On Tue, Nov 15, 2016 at 10:05 PM, Mikhail <m...@plus-plus.su> wrote: > On 11/16/2016 12:43 AM, Brian :: wrote: >> What type of disk controller and what caching mode are you using? > > The storage server is built with 4 x 4TB ST4000NM0034 Seagate disks, > attached to LSI Logic SAS3008 controller. Then there's Debian Jessie > with software RAID10 using MDADM. This space is given to Proxmox host > via iSCSI + LVM via 10 gbit ethernet. There's 32GB of RAM in this > storage server, so almost all this RAM can be used for cache (nothing > else runs there). > > I ran various tests on the storage server locally (created local LV, > formatted it to EXT4 and ran there various disk-intensive tasks such as > copying big files, etc). My average write speed to this MDADM raid10 / > LVM / Ext4 filesystem is about 70-80mb/s. I guess it should be much > faster then that, but I can't find out where's the bottleneck in this > setup.. > > # cat /proc/mdstat > Personalities : [raid10] > md0 : active raid10 sda2[0] sdd2[3] sdc2[2] sdb2[1] > 7811819520 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU] > bitmap: 11/59 pages [44KB], 65536KB chunk > > unused devices: <none> > > # pvs > PV VG Fmt Attr PSize PFree > /dev/md0 vg0 lvm2 a-- 7.28t 1.28t > > Thanks. > >> >> >> >> On Tue, Nov 15, 2016 at 9:36 PM, Mikhail <m...@plus-plus.su> wrote: >>> On 11/16/2016 12:33 AM, Brian :: wrote: >>>> 90.4 MB/s isn't that far off. >>> >>> Hello, >>> >>> Yes, but I'm only able to get these results when doing simple "dd" test >>> directly on Proxmox host machine inside NFS-mounted directory. KVM >>> guest's filesystem is not getting even 1/4 of that speed when it's disk >>> resides on the very same NFS (Debian installation from stock ISO takes >>> ~hour to copy first halt of it's files..) >>> _______________________________________________ >>> pve-user mailing list >>> pve-user@pve.proxmox.com >>> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user >> _______________________________________________ >> pve-user mailing list >> pve-user@pve.proxmox.com >> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user >> > > _______________________________________________ > pve-user mailing list > pve-user@pve.proxmox.com > http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user _______________________________________________ pve-user mailing list pve-user@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user