nfsstat from client and nfs server will help:<br><br>1. nfsstat -n -c for client<br>2. nfsstat -n -s for server<br><br>Just for test, do not test it on VM machine , simple copy some file over NFS ( some big file not /dev/null some 5 GB) with time command before test <br>
<br><br>Nikolay<br><br><div class="gmail_quote">2012/2/26 Ñî D <span dir="ltr"><<a href="mailto:yang_yi@neusoft.com">yang_yi@neusoft.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="blue" vlink="purple" lang="ZH-CN"><div><p class="MsoNormal"><span style="font-size:12.0pt" lang="EN-US">Hi<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12.0pt" lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt" lang="EN-US"> I set up virtual machine with OpenNebula2.2 + NFS(NAS Huawei Symantec). And the virtualization environment is rhel6.1 + kvm. But the vm is running very slow. In the vm system, gunzip a gz file takes very long time.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt" lang="EN-US"> the nfs server(NAS) is suse10 with nfs version 3.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12.0pt" lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt" lang="EN-US"> the nfs client is rhel6.1<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12.0pt;color:red" lang="EN-US">mount -t nfs -o timeo=10,noatime,intr,hard,retrans=5 172.16.14.115:/vx/B1ALL /one_images</span><span style="font-size:12.0pt" lang="EN-US"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt" lang="EN-US"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:12.0pt" lang="EN-US">I tried to install two img systems at the same time on the nfs, the %CPU is high. and the installation progress takes very long too.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt" lang="EN-US">So I wonder if the nfs can provide better performance for the vm ?<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:12.0pt" lang="EN-US">How can I tune the nfs server and client parameters to enhance nfs performance ? Thank you very much.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt" lang="EN-US"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US"><img src="" alt="˵Ã÷: cid:image003.jpg@01CCF484.269633A0" width="554" height="222"><u></u><u></u></span></p>
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