topic Re: Why doesn't the &quot;Disk&quot; option in the performance tab show up on VMs that are on an NFS Datastore? in VI: VMware ESX™ 3.5 Discussions https://communities.vmware.com/t5/VI-VMware-ESX-3-5-Discussions/Why-doesn-t-the-quot-Disk-quot-option-in-the-performance-tab/m-p/192423#M9917 <HTML><HEAD></HEAD><BODY><P>VMFS is block based and NFS is file based.</P><P>To have I/O detailed stats of NFS you need to watch on the NFS server.</P><P></P><P>Andre</P></BODY></HTML> Tue, 01 Sep 2009 05:04:18 GMT AndreTheGiant 2009-09-01T05:04:18Z Why doesn't the "Disk" option in the performance tab show up on VMs that are on an NFS Datastore? https://communities.vmware.com/t5/VI-VMware-ESX-3-5-Discussions/Why-doesn-t-the-quot-Disk-quot-option-in-the-performance-tab/m-p/192421#M9915 <HTML><HEAD></HEAD><BODY><P></P><P>Hi Guys</P><P></P><P></P><P> Looking for a way to monitor I/O performance of indivdual virtual machines in an ESX3.5/VC2.5. Normally we'd use a combination of guest level monitoring tools (perfmon, iostat etc.) and the ESX logging, however the later is not an option when the VM is on a NFS datastore.</P><P></P><P></P><P>Why is that? Is it to do with the lack of a VMFS filesystem?</P><P></P><P></P><P> Cheers</P><P></P><P></P><P> Sam</P><P></P><P></P></BODY></HTML> Tue, 01 Sep 2009 01:58:23 GMT https://communities.vmware.com/t5/VI-VMware-ESX-3-5-Discussions/Why-doesn-t-the-quot-Disk-quot-option-in-the-performance-tab/m-p/192421#M9915 SamTCLEGNZ 2009-09-01T01:58:23Z Re: Why doesn't the "Disk" option in the performance tab show up on VMs that are on an NFS Datastore? https://communities.vmware.com/t5/VI-VMware-ESX-3-5-Discussions/Why-doesn-t-the-quot-Disk-quot-option-in-the-performance-tab/m-p/192422#M9916 <HTML><HEAD></HEAD><BODY><P>I'm not 100% sure about it, but I really think that the disk performance ir related with the fact that iSCSI/FC access disks using an specific VMHBA, which is able to get the numbers needed to measure performance. NFS is a simple mount operation, and do not involve any measurable HBA device.</P><P></P><P>Marcelo Soares</P><P>VMWare Certified Professional 310/410</P><P>Technical Support Engineer</P><P>Linux Server Senior Administrator</P></BODY></HTML> Tue, 01 Sep 2009 02:06:45 GMT https://communities.vmware.com/t5/VI-VMware-ESX-3-5-Discussions/Why-doesn-t-the-quot-Disk-quot-option-in-the-performance-tab/m-p/192422#M9916 marcelo_soares 2009-09-01T02:06:45Z Re: Why doesn't the "Disk" option in the performance tab show up on VMs that are on an NFS Datastore? https://communities.vmware.com/t5/VI-VMware-ESX-3-5-Discussions/Why-doesn-t-the-quot-Disk-quot-option-in-the-performance-tab/m-p/192423#M9917 <HTML><HEAD></HEAD><BODY><P>VMFS is block based and NFS is file based.</P><P>To have I/O detailed stats of NFS you need to watch on the NFS server.</P><P></P><P>Andre</P></BODY></HTML> Tue, 01 Sep 2009 05:04:18 GMT https://communities.vmware.com/t5/VI-VMware-ESX-3-5-Discussions/Why-doesn-t-the-quot-Disk-quot-option-in-the-performance-tab/m-p/192423#M9917 AndreTheGiant 2009-09-01T05:04:18Z