Home › Forums › Miria forums – EN › Miria : Troubleshooting & Security › Why task converted from Contribute to Echo does not delete data on destination ?
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Francois Outao.
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5 November 2021 at 16 h 42 min #10595
It is because you are using FastScan.
For example:
- You are using Contribute mode:
- 1st sync is copying 5 files , snapshot1 is validated and is the reference
- 2nd sync , you are deleting 1 file from the source, FastScan is doing the diff and snapshot2 is validated as reference .
It is knowing only 4 files but nothing is deleted at destination because you are in contribute mode. - 3rd sync you are deleting 1 more file from the source, FastScan is doing the diff and snapshot3 is validated as reference and is knowing only 3 files but nothing is deleted at destination because you are in contribute mode.
- You decide to change to Echo mode:
- 4th sync you delete 1 more file from the source so you will have only 2 files on the source, FastScan is doing the diff based on the snapshot3 which is knowing 3 files, but in the fastscanlist it will tag only one file deleted.
So, on the destination we will delete only 1 file instead of 3 because FastScan generated a fastscanlist based on the last snapshot which is the reference.
- 4th sync you delete 1 more file from the source so you will have only 2 files on the source, FastScan is doing the diff based on the snapshot3 which is knowing 3 files, but in the fastscanlist it will tag only one file deleted.
That’s why, if you want to delete files at destination, you must delete the reference snapshot in Miria/DataFlow and run the task again.
That way, the synchronization task will run with a fresh snapshot and will use a standard scan that will let us know what is really on the source file system, then deleted files at the source will be deleted also from the destination.
- You are using Contribute mode:
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