When provisioning persistent volume claims (PVCs) on the Block Volume service using the CSI plugin, you can now configure block volumes to have one of the following file system types:

• ext3
• ext4 (the default)
• XFS

The ext3 and ext4 file systems are generally considered better-suited for applications that use a single read/write thread and small files. Whereas, the XFS file system is generally considered better-suited for applications that have multiple read/write threads and larger files.

For more information, see Specifying File System Types for Block Volumes.