"Perpill nem erzem az ext4-nel atutoen tobbnek az alapfeature-oket"
Pedig van egy pár, amelyek önmagukban is elég ütősek:
- Writable snapshots, read-only snapshots
- Subvolumes (separate internal filesystem roots)
- Compression (zlib and LZO)
- Integrated multiple device support
(File Striping, File Mirroring, File Striping+Mirroring, Striping with Single and Dual Parity implementations) - SSD (Flash storage) awareness (TRIM/Discard for reporting free blocks for reuse) and optimizations (e.g. avoiding unnecessary seek optimizations, sending writes in clusters, even if they are from unrelated files. This results in larger write operations and faster write throughput)
- Efficient Incremental Backup
- Background scrub process for finding and fixing errors on files with redundant copies
- Online filesystem defragmentation
- In-place conversion of existing ext3/4 file systems
- Seed devices. Create a (readonly) filesystem that acts as a template to seed other Btrfs filesystems. The original filesystem and devices are included as a readonly starting point for the new filesystem. Using copy on write, all modifications are stored on different devices; the original is unchanged.
- Subvolume-aware quota support
- Send/receive of subvolume changes
- Efficient incremental filesystem mirroring
- Batch, or out-of-band deduplication (happens after writes, not during)