fio1 Intel Core i5-4460 testing with a Mouse Z97-S01 v1.0 (V2.0B5 BIOS) and MSI Intel Xeon E3-1200 v3/4th Gen Core IGP on Ubuntu 20.04 via the Phoronix Test Suite. bcachefs replicas=3: Processor: Intel Core i5-4460 @ 3.40GHz (4 Cores), Motherboard: Mouse Z97-S01 v1.0 (V2.0B5 BIOS), Chipset: Intel 4th Gen Core DRAM, Memory: 2 x 8192 MB DDR3-1600MT/s, Disk: 2 x 1000GB TOSHIBA DT01ACA1 + 500GB SAMSUNG HD501LJ + 120GB Western Digital WDS120G1G0A-, Graphics: MSI Intel Xeon E3-1200 v3/4th Gen Core IGP (1100MHz), Audio: Intel Xeon E3-1200 v3/4th, Network: 4 x Intel 10-Gigabit X540-AT2 + Realtek RTL8111/8168/8411 OS: Ubuntu 20.04, Kernel: 6.7.3 (x86_64), Desktop: GNOME Shell 3.36.9, Display Server: X Server 1.20.13, Vulkan: 1.2.182, Compiler: GCC 9.4.0, File-System: BcacheFS bcachefs replicas=2: Processor: Intel Core i5-4460 @ 3.40GHz (4 Cores), Motherboard: Mouse Z97-S01 v1.0 (V2.0B5 BIOS), Chipset: Intel 4th Gen Core DRAM, Memory: 2 x 8192 MB DDR3-1600MT/s, Disk: 2 x 1000GB TOSHIBA DT01ACA1 + 500GB SAMSUNG HD501LJ + 120GB Western Digital WDS120G1G0A-, Graphics: MSI Intel Xeon E3-1200 v3/4th Gen Core IGP (1100MHz), Audio: Intel Xeon E3-1200 v3/4th, Network: 4 x Intel 10-Gigabit X540-AT2 + Realtek RTL8111/8168/8411 OS: Ubuntu 20.04, Kernel: 6.7.3 (x86_64), Desktop: GNOME Shell 3.36.9, Display Server: X Server 1.20.13, Vulkan: 1.2.182, Compiler: GCC 9.4.0, File-System: BcacheFS bcachefs replicas=1: Processor: Intel Core i5-4460 @ 3.40GHz (4 Cores), Motherboard: Mouse Z97-S01 v1.0 (V2.0B5 BIOS), Chipset: Intel 4th Gen Core DRAM, Memory: 2 x 8192 MB DDR3-1600MT/s, Disk: 2 x 1000GB TOSHIBA DT01ACA1 + 500GB SAMSUNG HD501LJ + 120GB Western Digital WDS120G1G0A-, Graphics: MSI Intel Xeon E3-1200 v3/4th Gen Core IGP (1100MHz), Audio: Intel Xeon E3-1200 v3/4th, Network: 4 x Intel 10-Gigabit X540-AT2 + Realtek RTL8111/8168/8411 OS: Ubuntu 20.04, Kernel: 6.7.3 (x86_64), Desktop: GNOME Shell 3.36.9, Display Server: X Server 1.20.13, Vulkan: 1.2.182, Compiler: GCC 9.4.0, File-System: BcacheFS Flexible IO Tester 3.36 Type: Random Read - Engine: IO_uring - Direct: Yes - Block Size: 4KB - Job Count: 4 - Disk Target: Default Test Directory IOPS > Higher Is Better bcachefs replicas=3 . 553 |==================================================== bcachefs replicas=2 . 420 |======================================= bcachefs replicas=1 . 203 |=================== Flexible IO Tester 3.36 Type: Random Write - Engine: IO_uring - Direct: Yes - Block Size: 4KB - Job Count: 4 - Disk Target: Default Test Directory IOPS > Higher Is Better bcachefs replicas=3 . 1839 |======== bcachefs replicas=2 . 2617 |=========== bcachefs replicas=1 . 12233 |================================================== Flexible IO Tester 3.36 Type: Sequential Read - Engine: IO_uring - Direct: Yes - Block Size: 4KB - Job Count: 4 - Disk Target: Default Test Directory IOPS > Higher Is Better bcachefs replicas=3 . 1488 |========================================== bcachefs replicas=2 . 1828 |=================================================== bcachefs replicas=1 . 1797 |================================================== Flexible IO Tester 3.36 Type: Sequential Write - Engine: IO_uring - Direct: Yes - Block Size: 4KB - Job Count: 4 - Disk Target: Default Test Directory IOPS > Higher Is Better bcachefs replicas=3 . 1816 |===== bcachefs replicas=2 . 2452 |======= bcachefs replicas=1 . 16700 |================================================== Flexible IO Tester 3.36 Type: Random Read - Engine: IO_uring - Direct: Yes - Block Size: 4KB - Job Count: 4 - Disk Target: Default Test Directory MB/s > Higher Is Better bcachefs replicas=3 . 2.218 |================================================== bcachefs replicas=2 . 1.686 |====================================== bcachefs replicas=1 . 0.818 |================== Flexible IO Tester 3.36 Type: Random Write - Engine: IO_uring - Direct: Yes - Block Size: 4KB - Job Count: 4 - Disk Target: Default Test Directory MB/s > Higher Is Better bcachefs replicas=3 . 7.361 |======== bcachefs replicas=2 . 10.292 |=========== bcachefs replicas=1 . 47.800 |================================================= Flexible IO Tester 3.36 Type: Sequential Read - Engine: IO_uring - Direct: Yes - Block Size: 4KB - Job Count: 4 - Disk Target: Default Test Directory MB/s > Higher Is Better bcachefs replicas=3 . 5.957 |========================================= bcachefs replicas=2 . 7.319 |================================================== bcachefs replicas=1 . 7.195 |================================================= Flexible IO Tester 3.36 Type: Sequential Write - Engine: IO_uring - Direct: Yes - Block Size: 4KB - Job Count: 4 - Disk Target: Default Test Directory MB/s > Higher Is Better bcachefs replicas=3 . 7.271 |===== bcachefs replicas=2 . 9.813 |======= bcachefs replicas=1 . 65.300 |=================================================