Some data is not being compressed till I move it off then back onto the dataset

[douglasg14b]

I have VM backups that are pushed to FreeNAS over NFS each weekend, however the backups are not compressing even though the lz4 compression is turned on in this dataset (and every other one for the matter).

If I move the files off the dataset, then back on, they show as compressed. Any idea what might be going on? The files are under the ownership of a different user on FreeNAS, since I have a dedicated user for pushing data to the backups dataset. Could that have anything to do with it?

 

[Nick2253]

Step one: hardware? version? configuration?

Where are you seeing that the file are/are not compressed? How are you moving files on and off the dataset? What are the settings for your dataset?