Choosing a file system in Linux impacts performance, reliability, and SSD longevity. Ext4, introduced in 2008, remains the standard for distributions like Ubuntu and Debian due to its stability and low overhead. It supports fscrypt for encryption but lacks native snapshot capabilities and RAID support.
XFS, developed by Silicon Graphics, is a high-performance 64-bit file system standard for RHEL-based systems. It excels at handling large files and high parallel workloads with minimal overhead. However, XFS partitions cannot be shrunk, requiring careful planning of disk space allocation.
Btrfs, the successor to Ext4, utilizes Copy-on-Write architecture to enable snapshots, on-the-fly compression, and RAID support. While it offers flexibility for desktop users, it requires regular maintenance such as scrubbing and balancing, and consumes more CPU resources compared to simpler systems.
ZFS is designed for data integrity, featuring cryptographic checksums and self-healing capabilities. It integrates RAID functionality and supports dataset-level encryption. Due to high RAM requirements for its ARC cache and licensing conflicts with the Linux kernel, it is primarily used in NAS and data-heavy servers.
Specialized file systems manage system resources: zram provides compressed swap in RAM, tmpfs stores temporary data in memory, and cgroupfs handles resource isolation for containers. The EFI System Partition (ESP) typically uses FAT32 and requires a dedicated physical partition for boot loaders.
