integrity vm network bandwidth

[Kenan Erdey]

Hi all,

i set up a samba server on a vm guest.when i try to download or upload a file i can' go over 6 MB/s. if i test the download from vm host it's about 11.5 MB/s. (my pc is behind 100 mbit's switch)

VM guest has 1 gbit interface. vSwitch is over 2 Gbit/s interfaces made by apa.

Is there anything to do for increasing vm guest's bandwidth?

thanks.

[kemo]

What is the "socket options" directive value?

# grep ' socket options ' smb.conf

[Turgay Cavdar]

What is the HPVM version?
In the guest are you using AVIO for ethernet?
Any resource contention (cpu etc..) on the guest?

[Kenan Erdey]

hi again,

# grep "socket options" /etc/opt/samba/smb.conf
; socket options = TCP_NODELAY


integrity vm 4.20 version. Guest has 4 vcpu and 10 gb memory. Also avio_lan is used for network.

[kemo]

please check the below link
http://www.samba.org/samba/docs/man/Samba-HOWTO-Collection/speed.html

[Turgay Cavdar]

Are there any differences between host and guest's OS level,samba version, network parameters?
Have you tried netperf or ftp to measure vm guest's bandwidth? If they also show 6Mb/s, then you have a global bottleneck in the guest. If you have better values then you need to tune some parameters for samba.

[Kenan Erdey]

selam turgay,

i tested it. it also showed 6 Mbit/s. i had thought with a parameter in hpvmnet or hpvmmodify i can increase the resource. but i couldn't.

i added option TC_NODELAY. but not increased over 6 mbit/s.

[Turgay Cavdar]

This can be related to guest and host LAN AVIO driver. What is the guest's OS version? If you have a guest with different OS version on the same host, you can try to find the network bandwith and compare each guest's values.

[Kenan Erdey]

no, both are same driver version and 11.31.

[Turgay Cavdar]

Hi,
I have tested (with ftp) network speed on one of our host (version 4.1, AVIO LAN B.11.31.0909), on the host i get 100MB/sec.
-On the hpux 11.23 guests(AVIO LAN B.11.23.0812), network throughput is 93MB/sec
-On the hp-ux 11.31 guests(AVIO LAN B.11.31.0909), network througput is 65MB/sec

There are significant difference between 11.31 and 11.23 guest performance.

If you have a support then you can open a case to HP about the degration of performance in the guest.