3 Replies Latest reply: Jul 12, 2014 12:31 PM by Mark Harrison RSS

    Free Space in vSphere vs. What Nimble Reports

    Bryan Lollich Newbie


      Brand new to Nimble....so forgive my ignorance

       

      I've created a 500GB volume and migrated 3 servers into that volume.  vCenter sees that volume with 509GB provisioned and 22GB free space left.

       

      Nimble reports that the volume is using 237GB, so I should have over 250GB of free space on that volume.  However, since vCenter doesn't see what Nimble sees I cant move any more servers onto that volume.  vSphere reports "Insufficient disk space on datastore xxx".

       

      Is this by design?  Or am I missing something?

        • Re: Free Space in vSphere vs. What Nimble Reports
          rfenton Tracker

          Hey Bryan

           

          Welcome to Nimble and Nimble: Connect !!

           

          VMWare ESX will write to it's datastore as if it's a regular disk... the Nimble array will compress that data in-line (with no degradation to performance) so although ESX is reporting it's stored 500GB, the array has compressed that into the 237GB  (saving you the space in return)

           

          If you've not done so already register the Nimble vCenter Management plugin as this will allow your vCenter server to view the Nimble volumes (plus much more)

           

          Feel free to post back if you need more info or have more questions

           

          Cheers

          Rich

          • Re: Free Space in vSphere vs. What Nimble Reports
            Mark Harrison Adventurer

            Look in the downloads section under KB Articles for "

                                              
                 
                  
                   

            KB-000079 Oct 9, 2013

                  
                 
                
                 
                  
                   

            Compression and VMFS Free Space Reported

                  
                 
                
                
            "

            Regards,
                           Mark.
            • Re: Free Space in vSphere vs. What Nimble Reports
              Mark Harrison Adventurer

              Hi Bryan,

                             This had me baffled for a moment until I realised exactly what the KB article outlined. Probably a reason for some SAN admins preferring not to use thin provisioning. The simplicity of reporting available usage and space on the Nimble GUI makes me for one comfortable with thin provisioning and compression. The other thing that threw me was the SCSI UNMAP.  Have a quick read about this and you will have a little more clarity about what one system says versus your Nimble array.  


              Regards,

                            Mark.