Delta generation of a file within the backup source exceeded 100%

Brad Alexander
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  1. Product Version:
    2. ServosityStandard: All
    ServosityPro: All
    OS: All platforms
  2. Problem Description:
    3. When performing a file backup, the delta generation for a file within the backup source exceeded 100%:
    Backup Logs
     No.  Type  Timestamp  Backup Logs
    1 Info YYYY/MM/DD hh:mm Start [ All platforms (Test), ServosityPro 5.x.x.x ]
    2 Info  YYYY/MM/DD hh:mm Start running pre-commands
    3  ... ... ...
    ...  Info YYYY/MM/DD hh:mm Generate incremental delta since "YYYY-MM-DD-hh-mm-ss"
    ... Info YYYY/MM/DD hh:mm Downloading delta information ... Completed
    ...  Info YYYY/MM/DD hh:mm Generating delta file ... 0% processed. 
    ... Info YYYY/MM/DD hh:mm Generating delta file ... 10% processed. 
    ...  Info YYYY/MM/DD hh:mm  Generating delta file ... 20% processed. 
    ... ... ... ... 
    ...  Info YYYY/MM/DD hh:mm  Generating delta file ... 99% processed. 
    ... Info YYYY/MM/DD hh:mm Generating delta file ... 109% processed. 
    ...  Info YYYY/MM/DD hh:mm  Generating delta file ... 119% processed. 
    ... ... ... ...
  3. Cause:
    4. The message suggests that the file in concern is being altered by another application during the backup process. In other words, the file size of the corresponding file is growing when the delta file is being generated.

    This issue will usually occurs for dynamic file that is amended constantly.
  4. Resolution:
    5. To resolve the issue, please exclude the corresponding file from the backup set. Alternatively, please consider performing the backup job at another time when the file is not in use.