How to sync the VSS inside the guest while creating production Checkpoint for rct based hyperv Backups RRS feed

  • Question

  • We are working on RCT based  Hyper-V VM backups .

    We have implemented the module to backup incremental changes for VM disks using RCT .

    Design (Full Backup)
    Create a Recovery checkpoint
    Read the Entire Data
    Convert Checkpoint to refernce Point

    Design (Incr Backup)
    Create a Recovery checkpoint
    Get The changes with the previous RCT ID for disk
    Read the changes
    Convert Checkpoint to refernce Point

    Now we are working on appaware processing of the guest Vms . 
    Once we have specified the checkpoint consistency level as application consistent 

    * While the checkpoint creation is in process the VSS writers inside the guest gets quiesced and
    we observe that the writers are in waiting for completion State 

    * After Checkpoint creation the writers are released and the Transaction logs of applications are truncated .

    * But on an ideal scenario we would like to Issue backupComplete for In Guest VSS Snapshot after successfull backup  (After reference point Conversion).

    Is there any way to achieve this ?
    Tuesday, March 26, 2019 1:05 PM