Hi,
i created a KVM Virtual Machine Ubuntu (11.04) and wonder why the Data Transfer performance is so slow.
Samba is used for Filetransfer between the Ubuntu guest and a network client. I only get 5-10MB/s.
For comparison i installed a Samba Server directly on the Proxmox Host ("v1"), there i get 80 MB/s to the same client, so there must be some problem with the guests. I know there is some performance loss when running guests, but that cant explain that slow transfer.
I used Image Format qcow2, Disk Type Virtio and Network Card Virtio No tweaking else, everything created from the Gui.
Some more information: Proxmox 1.8, Kernel Linux v1 2.6.35 (upgraded from 2.6.32, but didnt changed anything, Guest Transfer Performance was bad on both Kernels)
My Disk Performance on the Host with my 2 Harddrives:
v1:~# hdparm -tT /dev/sda
/dev/sda:
Timing cached reads: 2304 MB in 2.00 seconds = 1151.78 MB/sec
Timing buffered disk reads: 254 MB in 3.02 seconds = 84.21 MB/sec
v1:~# hdparm -tT /dev/sdb
/dev/sdb:
Timing cached reads: 2380 MB in 2.00 seconds = 1190.25 MB/sec
Timing buffered disk reads: 254 MB in 3.01 seconds = 84.48 MB/sec
Any hints?
i created a KVM Virtual Machine Ubuntu (11.04) and wonder why the Data Transfer performance is so slow.
Samba is used for Filetransfer between the Ubuntu guest and a network client. I only get 5-10MB/s.
For comparison i installed a Samba Server directly on the Proxmox Host ("v1"), there i get 80 MB/s to the same client, so there must be some problem with the guests. I know there is some performance loss when running guests, but that cant explain that slow transfer.
I used Image Format qcow2, Disk Type Virtio and Network Card Virtio No tweaking else, everything created from the Gui.
Some more information: Proxmox 1.8, Kernel Linux v1 2.6.35 (upgraded from 2.6.32, but didnt changed anything, Guest Transfer Performance was bad on both Kernels)
My Disk Performance on the Host with my 2 Harddrives:
v1:~# hdparm -tT /dev/sda
/dev/sda:
Timing cached reads: 2304 MB in 2.00 seconds = 1151.78 MB/sec
Timing buffered disk reads: 254 MB in 3.02 seconds = 84.21 MB/sec
v1:~# hdparm -tT /dev/sdb
/dev/sdb:
Timing cached reads: 2380 MB in 2.00 seconds = 1190.25 MB/sec
Timing buffered disk reads: 254 MB in 3.01 seconds = 84.48 MB/sec
Any hints?