Here’s a cheat-sheet table comparing Ext4, XFS, Btrfs, and ZFS at a glance:
| Feature / FS | Ext4 | XFS | Btrfs | ZFS |
|---|---|---|---|---|
| Stability | Very stable, default in many distros | Very stable, enterprise-grade | Stable (except RAID5/6) | Very stable, but out-of-tree |
| Performance | Good all-around | Excellent for large files, parallel I/O | Good, but COW can slow DB/VM workloads | Good, but heavier resource usage |
| Snapshots | ❌ No | ❌ No | ✅ Yes (lightweight) | ✅ Yes (mature) |
| Checksums | ❌ Metadata only | ❌ Metadata only | ✅ Data + metadata | ✅ Data + metadata |
| RAID | ❌ External tools (mdadm, LVM) | ❌ External tools | ✅ Built-in (1,10; 5/6 unsafe) | ✅ Built-in (very mature) |
| Compression | ❌ No | ❌ No | ✅ (zstd, lzo, zlib) | ✅ (lz4, gzip, zstd, etc.) |
| Deduplication | ❌ No | ❌ No | ✅ Mature (but RAM-hungry) | |
| Resource Use | Low | Low | Moderate | High (needs lots of RAM) |
| Recovery Tools | ✅ Excellent | ✅ Excellent | ||
| Best Use Case | General desktops, simple servers | High-performance, large filesystems | Desktops/laptops, small servers, snapshots | NAS, servers, archival, data-critical systems |
- Ext4 → Safe default, simple & reliable.
- XFS → Speed & scalability for large files.
- Btrfs → Modern features (snapshots, compression) for desktops & small servers.
- ZFS → Maximum data integrity for enterprise & NAS, but resource-heavy.