topic Re: Why does ESXi NFS datastore outperform VM NFS mounts ? in VMware Solutions Discussions https://community.netapp.com/t5/VMware-Solutions-Discussions/Why-does-ESXi-NFS-datastore-outperform-VM-NFS-mounts/m-p/42502#M4171 <HTML><HEAD></HEAD><BODY><P>On a related note we had a Linux VM on netapp NFS datastore with IO performance issues.</P><P></P><P>Following VMware support's recommendation we were able to tune the Guest OS to improve performance:</P><P></P><P><A class="active_link" href="http://www.vmadmin.info/2012/10/linux-vm-io-scheduler-tuning.html" title="http://www.vmadmin.info/2012/10/linux-vm-io-scheduler-tuning.html" target="_blank">http://www.vmadmin.info/2012/10/linux-vm-io-scheduler-tuning.html</A></P></BODY></HTML> Wed, 31 Oct 2012 16:32:10 GMT fletch2007 2012-10-31T16:32:10Z Why does ESXi NFS datastore outperform VM NFS mounts ? https://community.netapp.com/t5/VMware-Solutions-Discussions/Why-does-ESXi-NFS-datastore-outperform-VM-NFS-mounts/m-p/42498#M4170 <HTML><HEAD></HEAD><BODY><P>We are seeing a 3x performance improvement when the VM is presented Netapp NFS storage as a guest OS disk vs the VM NFS mounting the same space.</P><P>This is problematic in the case where our apache VM pool needs to mount a shared web tree - performance suffers - the shared mounts can not be make "local".</P><P></P><P>the question is why the 3x performance difference?</P><P></P><P>Specs:</P><P></P><P>Dell 610s 196Gb Ram</P><P>vSphere 5.0 U1</P><P>Netapp plugin for vCenter provides best NFS settings</P><P>CentOS 5 VMs</P><P>VM NFS mount options: rw,noatime,bg,nfsvers=3,proto=tcp,hard,nointr,timeo=600,rsize=32768,wsize=32768</P><P></P><P>thanks</P></BODY></HTML> Thu, 05 Jun 2025 06:20:13 GMT https://community.netapp.com/t5/VMware-Solutions-Discussions/Why-does-ESXi-NFS-datastore-outperform-VM-NFS-mounts/m-p/42498#M4170 fletch2007 2025-06-05T06:20:13Z Re: Why does ESXi NFS datastore outperform VM NFS mounts ? https://community.netapp.com/t5/VMware-Solutions-Discussions/Why-does-ESXi-NFS-datastore-outperform-VM-NFS-mounts/m-p/42502#M4171 <HTML><HEAD></HEAD><BODY><P>On a related note we had a Linux VM on netapp NFS datastore with IO performance issues.</P><P></P><P>Following VMware support's recommendation we were able to tune the Guest OS to improve performance:</P><P></P><P><A class="active_link" href="http://www.vmadmin.info/2012/10/linux-vm-io-scheduler-tuning.html" title="http://www.vmadmin.info/2012/10/linux-vm-io-scheduler-tuning.html" target="_blank">http://www.vmadmin.info/2012/10/linux-vm-io-scheduler-tuning.html</A></P></BODY></HTML> Wed, 31 Oct 2012 16:32:10 GMT https://community.netapp.com/t5/VMware-Solutions-Discussions/Why-does-ESXi-NFS-datastore-outperform-VM-NFS-mounts/m-p/42502#M4171 fletch2007 2012-10-31T16:32:10Z