On 1.3.2013 13.22, Van wrote:

26.02.2013, 20:01, "Veli-Pekka Kestilä" centos@vpk.nu:

I have problem using Dom0 as NFS(v4)-server and DomU as client. When
ever the client actually tries to copy data to nfs-server the virtual
network (bridge) between the two hosts completely freezes and stops
working. After this of course the client hangs waiting nfs-server to
answer and server continues to try to contact nfslock daemon on
the client.

Dom0 is still accessible from outside trough virbr0 which the client
doesn't have access. The problems only come on data transfer as
making
directories and removing them and doind ls works fine before one
tries
to transfer data.
<http://lists.centos.org/mailman/listinfo/centos-virt>

What size files are copied? http://ubuntuforums.org/archive/index.php/t-1478413.html

I found that thread also.

Size is smaller than that. After sending the e-mail I tested and if copying size was small enough it seemingly succeeded. I was planning to use strace, but the system was needed for use and I had to resort attaching direct disk on the system. This isn't optimal as it is a test system for bigger one. Another thing to try would be probably to tie the virtual bridge to physical interface on the computer.

Unfortunately I can't test the problem at the moment before I find another system to replicate the setup.

-vpk

On 1.3.2013 16.40, Van wrote:

01.03.2013, 15:22, "Van" van-1@yandex.ru:

...

26.02.2013, 20:01, "Veli-Pekka Kestilä" centos@vpk.nu:

...

Greetings,

I have problem using Dom0 as NFS(v4)-server and DomU as client. When ever the client actually tries to copy data to nfs-server the virtual network (bridge) between the two hosts completely freezes and stops working. After this of course the client hangs waiting nfs-server to answer and server continues to try to contact nfslock daemon on the client.

Dom0 is still accessible from outside trough virbr0 which the client doesn't have access. The problems only come on data transfer as making directories and removing them and doind ls works fine before one tries to transfer data.

Show the command or line from /etc/fstab whitch you use for mounting NFS-volume. I think rsize/wsize larger then MTU.

Трудно жить ничего не делая, но мы привыкли бороться с трудностями. _______________________________________________ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt

Thank you for taking the time.

Yes. They are bigger, rsize=32768, wsize=32768 and MTU:1500

So growing MTU or decreasing rsize and wsize could solve the problem? Need to create new test system to test this.

-vpk