Hi Markus, I am sorry that you had a bad experience with ovirt and I am sure everyone in the ovirt community appreciate your feedback and your contribution. As you said, I am positive that you will be able to get it all managed and please use the list for any needed assistance. I am adding some people to this mail so that they can help with the wiki request. Thanks for the input! Dafna On 09/09/2013 11:53 AM, Markus Stockhausen wrote:
Hello,
although it helps nobody I just want to leave the information that my first two weeks with ovirt were horrible. That said I'm still confident that I will able to get it all managed.
For know I have some addition to the NFS troubleshooting wiki that could be helpful for others. My wiki account request is still pending so maybe someone with access could expand the page.
NFS mounts on the hypervisor hosts (at least Fedora 19) use the option rsize=1M,wsize=1M by default. If the NFS servers maximum tcp window memory settings are less or equal than 1M the connections to NFS data/ISO domains may stall from time to time.
Raising the TCP kernel settings on NFS server side to
net.ipv4.tcp_mem = 4096 65536 4194304 net.ipv4.tcp_rmem = 4096 65536 4194304 net.ipv4.tcp_wmem = 4096 65536 4194304
helps to get things stable.
Markus
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-- Dafna Ron