Posted On: Mar 6, 2017

Amazon Elastic File System (Amazon EFS) now supports NFS version 4 lock upgrading and downgrading functionality. This new capability extends support in Amazon EFS for the NFSv4.1 and NFSv4.0 protocols by allowing you to run applications that upgrade a read lock atomically to a write lock and downgrade a write lock atomically to a read lock. One example is SQLite, a popular library that’s embedded into many applications and programming language tools like Python and PHP.

There is no charge to use this feature and it is immediately available in all Amazon EFS regions.