ZFS or XFS?

Which File System Should You Choose: ZFS or XFS?

euroNAS Premium supports two of the most powerful file systems: ZFS and XFS. The choice of the right file system depends on your requirements, planned hardware, and storage management goals. Below, we explain the differences and advantages of each to help you make the right decision.

ZFS – The Powerful, Self-Managing File System

ZFS (Zettabyte File System) is a modern, advanced file system designed for reliability, data integrity, and ease of use.

Integrated RAID: ZFS manages its own RAID configurations (RAID-Z, RAID-Z2, RAID-Z3, Mirror). It does not require hardware or Linux software RAID controllers.
Data Integrity and Self-Healing: ZFS continuously verifies data integrity and automatically repairs corrupted data if a redundant copy is available.
Snapshots and Clones: Snapshots are highly efficient at the block level, requiring minimal storage. Writable clones are useful for testing and development environments.
Scalability and Efficiency: ZFS handles large datasets, provides automatic compression, and saves space through deduplication.

Drawback: For ZFS we recommend at least 646 GB of RAM and places higher demands on the CPU than other file systems.

XFS – The Reliable, High-Performance File System

XFS is a traditional journaled file system optimised for speed and reliability.

Performance: Excellent performance for parallel read and write operations.
Flexibility in RAID Options: XFS relies on hardware RAID or Linux software RAID (mdadm) for redundancy.
Snapshots: Managed through LVM or RAID, though less flexible than ZFS snapshots.
Lower Hardware Requirements: Less demanding on RAM and CPU compared to ZFS.

Summary: When to Choose ZFS or XFS?

Feature	ZFS	XFS
RAID	Integrated (RAID-Z, Mirror)	Requires Hardware or Software RAID
Data Integrity	Self-healing, continuous verification	No integrated data verification
Snapshots	Highly efficient, writable clones	Managed via LVM/RAID, less flexible
Performance	High, but RAM and CPU intensive	Excellent, with lower hardware demands
Hardware Requirements	Higher RAM requirements (16 GB or more recommended)	Lower RAM requirements

Choose ZFS if data integrity and flexibility are your priorities. XFS is an excellent choice for performance-focused applications with lower hardware requirements.