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Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs
First up are the runs from the Flexible IO Tester (FIO) with the Phoronix Test Suite.
In carrying out random reads, for all of the file-systems atop mdadm RAID arrays, RAID 6 was the fastest. The fastest file-system in the RAID 6 array was XFS followed by F2FS. For RAID 0, F2FS was the fastest. One issue to point out in this random read testing is the poor XFS performance with mdadm RAID 10 compared to the other tested file-systems.
The native Btrfs RAID support in RAID 0 led to the fastest performance for random writes in FIO. Aside from the native Btrfs RAID numbers and the not too useful RAID 0, mdadm-based RAID 5 with Btrfs was running the fastest for this random write workload.