Thanks for your reply Suhas.
But as i said snapshots are created with forever retention policy so are not getting deleted automatically.
I tried creating one test snapshot with 2 days retention and checked that the snapshot is getting deleted so appliance is working fine.
Also GC is working fine and showing it has recovered 170 MB recently. So the problem doesn't seem with functionality of VDP appliance.
And i have to remove the snapshots manually as there isn't any expiration date mentioned against the snapshots which are configured with forever retention policy.
Please guide.
Regards,
Hiren Shinde.