[one-users] persistent vs. non persistent

[Lukman Fikri]

Hi,

i already used persistent image setting, but why  it didn't retain the changes made when the VM is shutdown?
my VM was destroyed immediately after i shutdown it. 
So i used to suspend the VM rather than shutting down it.

Thank you,
-Lukman

Date: Tue, 3 Sep 2013 10:16:08 -0500
From: gerard1 at fnal.gov
To: cmartin at opennebula.org
CC: users at lists.opennebula.org
Subject: Re: [one-users] persistent vs. non persistent


  
    
  
  
    Kenneth, if you use qcow2 copy-on-write
      with a preplaced or shared base image, non-persistent VMs will be
      as fast as persistent ones with shared TM.

      Gerard Bernabeu
FermiCloud and FermiGrid Services at Fermilab
Phone (+1) 630-840-6509
      On 09/03/2013 08:41 AM, Carlos Martín Sánchez wrote:

    
    
      
      Hi,
        

        
        As you said, the main difference is that persistent Images
          will retain the changes made when the VM is shutdown. Because
          of this, persistent Images can only be used by one VM at a
          time, while non-persistent ones can be used by several VMs.
        

        
        A persistent Image will have a faster deploying time
          (prolog phase), depending on your storage configuration [1].
          For example, for the shared TM the deployment will be
          immediate [2], whereas for the shared TM the deployment time
          will be the same [3].
        

        
        Regards
        

        
        [1] http://opennebula.org/documentation:rel4.2:sm

        
        [2] http://opennebula.org/documentation:rel4.2:fs_ds#persistent_non_persistent_images

        
        [3] http://opennebula.org/documentation:rel4.2:fs_ds#persistent_non_persistent_images1

        
      
      
        
        
          --

            Join us at OpenNebulaConf2013
            in Berlin, 24-26 September, 2013

            --
            Carlos Martín, MSc

              Project Engineer

              OpenNebula - The Open-source Solution for Data Center
              Virtualization
              
                www.OpenNebula.org
                  | cmartin at opennebula.org
                  | @OpenNebula
            
          
        
        

        

        On Tue, Sep 3, 2013 at 10:04 AM,
          Kenneth <kenneth at apolloglobal.net>
          wrote:

          
            
              What the difference between non persistent and
                persistent image?

              - are the changes not saved on a non persistent image?

              - is one faster than the other?

              
                   

                  
                    -- 
Thanks,
Kenneth
                  
                
            

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