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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hello,<br>
<br>
although it helps nobody I just want to leave the information that <br>
my first two weeks with ovirt were horrible. That said I'm still<br>
confident that I will able to get it all managed. <br>
<br>
For know I have some addition to the NFS troubleshooting wiki<br>
that could be helpful for others. My wiki account request is still<br>
pending so maybe someone with access could expand the page.<br>
<br>
NFS mounts on the hypervisor hosts (at least Fedora 19) use the <br>
option rsize=1M,wsize=1M by default. If the NFS servers maximum <br>
tcp window memory settings are less or equal than 1M the <br>
connections to NFS data/ISO domains may stall from time to time.<br>
<br>
Raising the TCP kernel settings on NFS server side to<br>
<br>
net.ipv4.tcp_mem = 4096 65536 4194304<br>
net.ipv4.tcp_rmem = 4096 65536 4194304<br>
net.ipv4.tcp_wmem = 4096 65536 4194304<br>
<br>
helps to get things stable.<br>
<br>
Markus<br>
<br>
<br>
<br>
<br>
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