Btrfs RAID Linux 4.7 vs. Linux 4.8 Kernel
Btrfs RAID tests on Linux 4.7 kernel. Benchmarks by Michael Larabel for a future article on Phoronix.com.


Linux 4.7: Single Disk: 

	Processor: Intel Xeon E3-1280 v5 @ 4.00GHz (8 Cores), Motherboard: MSI C236A WORKSTATION (MS-7998) v1.0, Chipset: Intel Skylake, Memory: 16384MB, Disk: 4 x 120GB TOSHIBA-TR150 + Samsung SSD 950 PRO 256GB, Graphics: LLVMpipe, Audio: Realtek ALC1150, Network: Intel Connection

	OS: Ubuntu 16.10, Kernel: 4.7.0-040700-generic (x86_64), Desktop: Unity 7.5.0, Display Server: X Server 1.18.4, Display Driver: modesetting 1.18.4, OpenGL: 3.3 Mesa 12.0.1 Gallium 0.4, Compiler: GCC 6.1.1 20160724, File-System: btrfs, Screen Resolution: 1024x768

Linux 4.7: RAID0 4-Disk: 

	Processor: Intel Xeon E3-1280 v5 @ 4.00GHz (8 Cores), Motherboard: MSI C236A WORKSTATION (MS-7998) v1.0, Chipset: Intel Skylake, Memory: 16384MB, Disk: 4 x 120GB TOSHIBA-TR150 + Samsung SSD 950 PRO 256GB, Graphics: LLVMpipe, Audio: Realtek ALC1150, Network: Intel Connection

	OS: Ubuntu 16.10, Kernel: 4.7.0-040700-generic (x86_64), Desktop: Unity 7.5.0, Display Server: X Server 1.18.4, Display Driver: nouveau 1.0.12, OpenGL: 3.3 Mesa 12.0.1 Gallium 0.4, Compiler: GCC 6.1.1 20160724, File-System: btrfs, Screen Resolution: 1024x768

Linux 4.7: RAID1 4-Disk: 

	Processor: Intel Xeon E3-1280 v5 @ 4.00GHz (8 Cores), Motherboard: MSI C236A WORKSTATION (MS-7998) v1.0, Chipset: Intel Skylake, Memory: 16384MB, Disk: 4 x 120GB TOSHIBA-TR150 + Samsung SSD 950 PRO 256GB, Graphics: LLVMpipe, Audio: Realtek ALC1150, Network: Intel Connection

	OS: Ubuntu 16.10, Kernel: 4.7.0-040700-generic (x86_64), Desktop: Unity 7.5.0, Display Server: X Server 1.18.4, Display Driver: nouveau 1.0.12, OpenGL: 3.3 Mesa 12.0.1 Gallium 0.4, Compiler: GCC 6.1.1 20160724, File-System: btrfs, Screen Resolution: 1024x768

Linux 4.7: RAID10 4-Disk: 

	Processor: Intel Xeon E3-1280 v5 @ 4.00GHz (8 Cores), Motherboard: MSI C236A WORKSTATION (MS-7998) v1.0, Chipset: Intel Skylake, Memory: 16384MB, Disk: 4 x 120GB TOSHIBA-TR150 + Samsung SSD 950 PRO 256GB, Graphics: LLVMpipe, Audio: Realtek ALC1150, Network: Intel Connection

	OS: Ubuntu 16.10, Kernel: 4.7.0-040700-generic (x86_64), Desktop: Unity 7.5.0, Display Server: X Server 1.18.4, Display Driver: nouveau 1.0.12, OpenGL: 3.3 Mesa 12.0.1 Gallium 0.4, Compiler: GCC 6.1.1 20160724, File-System: btrfs, Screen Resolution: 1024x768

Linux 4.8: Single Disk: 

	Processor: Intel Xeon E3-1280 v5 @ 4.00GHz (8 Cores), Motherboard: MSI C236A WORKSTATION (MS-7998) v1.0, Chipset: Intel Skylake, Memory: 16384MB, Disk: 4 x 120GB TOSHIBA-TR150 + Samsung SSD 950 PRO 256GB, Graphics: Sapphire AMD Radeon R9 FURY / NANO 4096MB, Audio: Realtek ALC1150, Monitor: Acer B286HK, Network: Intel Connection

	OS: Ubuntu 16.10, Kernel: 4.8.0-999-generic (x86_64) 20160813, Desktop: Unity 7.5.0, Display Server: X Server 1.18.4, Display Driver: modesetting 1.18.4, OpenGL: 4.3 Mesa 12.1.0-devel- padoka PPA Gallium 0.4, Compiler: GCC 6.1.1 20160805, File-System: btrfs, Screen Resolution: 3840x2160

Linux 4.8: RAID0 4-Disk: 

	Processor: Intel Xeon E3-1280 v5 @ 4.00GHz (8 Cores), Motherboard: MSI C236A WORKSTATION (MS-7998) v1.0, Chipset: Intel Skylake, Memory: 16384MB, Disk: 4 x 120GB TOSHIBA-TR150 + Samsung SSD 950 PRO 256GB, Graphics: Sapphire AMD Radeon R9 FURY / NANO 4096MB, Audio: Realtek ALC1150, Monitor: Acer B286HK, Network: Intel Connection

	OS: Ubuntu 16.10, Kernel: 4.8.0-999-generic (x86_64) 20160813, Desktop: Unity 7.5.0, Display Server: X Server 1.18.4, Display Driver: modesetting 1.18.4, OpenGL: 4.3 Mesa 12.1.0-devel- padoka PPA Gallium 0.4, Compiler: GCC 6.1.1 20160805, File-System: btrfs, Screen Resolution: 3840x2160

Linux 4.8: RAID1 4-Disk: 

	Processor: Intel Xeon E3-1280 v5 @ 4.00GHz (8 Cores), Motherboard: MSI C236A WORKSTATION (MS-7998) v1.0, Chipset: Intel Skylake, Memory: 16384MB, Disk: 4 x 120GB TOSHIBA-TR150 + Samsung SSD 950 PRO 256GB, Graphics: Sapphire AMD Radeon R9 FURY / NANO 4096MB, Audio: Realtek ALC1150, Monitor: Acer B286HK, Network: Intel Connection

	OS: Ubuntu 16.10, Kernel: 4.8.0-999-generic (x86_64) 20160813, Desktop: Unity 7.5.0, Display Server: X Server 1.18.4, Display Driver: modesetting 1.18.4, OpenGL: 4.3 Mesa 12.1.0-devel- padoka PPA Gallium 0.4, Compiler: GCC 6.1.1 20160805, File-System: btrfs, Screen Resolution: 3840x2160

Linux 4.8: RAID10 4-Disk: 

	Processor: Intel Xeon E3-1280 v5 @ 4.00GHz (8 Cores), Motherboard: MSI C236A WORKSTATION (MS-7998) v1.0, Chipset: Intel Skylake, Memory: 16384MB, Disk: 4 x 120GB TOSHIBA-TR150 + Samsung SSD 950 PRO 256GB, Graphics: Sapphire AMD Radeon R9 FURY / NANO 4096MB, Audio: Realtek ALC1150, Monitor: Acer B286HK, Network: Intel Connection

	OS: Ubuntu 16.10, Kernel: 4.8.0-999-generic (x86_64) 20160813, Desktop: Unity 7.5.0, Display Server: X Server 1.18.4, Display Driver: modesetting 1.18.4, OpenGL: 4.3 Mesa 12.1.0-devel- padoka PPA Gallium 0.4, Compiler: GCC 6.1.1 20160805, File-System: btrfs, Screen Resolution: 3840x2160


Flexible IO Tester 2.1.13
Type: Random Read - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory - Result: MB/s
MB/s > Higher Is Better
Linux 4.7: Single Disk ... 217.54 |==============
Linux 4.7: RAID0 4-Disk .. 667.68 |===========================================
Linux 4.7: RAID1 4-Disk .. 283.99 |==================
Linux 4.7: RAID10 4-Disk . 431.17 |============================
Linux 4.8: Single Disk ... 217.98 |==============
Linux 4.8: RAID0 4-Disk .. 685.31 |============================================
Linux 4.8: RAID1 4-Disk .. 284.64 |==================
Linux 4.8: RAID10 4-Disk . 425.77 |===========================


Flexible IO Tester 2.1.13
Type: Random Read - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory - Result: IOPS
IOPS > Higher Is Better
Linux 4.7: Single Disk ... 54548  |==============
Linux 4.7: RAID0 4-Disk .. 164240 |==========================================
Linux 4.7: RAID1 4-Disk .. 71902  |===================
Linux 4.7: RAID10 4-Disk . 108058 |============================
Linux 4.8: Single Disk ... 54819  |==============
Linux 4.8: RAID0 4-Disk .. 170657 |============================================
Linux 4.8: RAID1 4-Disk .. 71253  |==================
Linux 4.8: RAID10 4-Disk . 106252 |===========================


BlogBench 1.0
Test: Write
Final Score > Higher Is Better
Linux 4.7: Single Disk ... 4347 |========================
Linux 4.7: RAID0 4-Disk .. 7847 |===========================================
Linux 4.7: RAID1 4-Disk .. 5521 |==============================
Linux 4.7: RAID10 4-Disk . 5974 |================================
Linux 4.8: Single Disk ... 4930 |===========================
Linux 4.8: RAID0 4-Disk .. 8467 |==============================================
Linux 4.8: RAID1 4-Disk .. 5898 |================================
Linux 4.8: RAID10 4-Disk . 6899 |=====================================


PostgreSQL pgbench 9.4.3
Scaling: On-Disk - Test: Normal Load - Mode: Read Write
TPS > Higher Is Better
Linux 4.7: Single Disk ... 1109.05 |===========================
Linux 4.7: RAID0 4-Disk .. 1781.17 |===========================================
Linux 4.7: RAID1 4-Disk .. 1186.65 |=============================
Linux 4.7: RAID10 4-Disk . 1494.37 |====================================
Linux 4.8: Single Disk ... 984.49  |========================
Linux 4.8: RAID0 4-Disk .. 1488.76 |====================================
Linux 4.8: RAID1 4-Disk .. 933.61  |=======================
Linux 4.8: RAID10 4-Disk . 1401.13 |==================================


FS-Mark 3.3
Test: 5000 Files, 1MB Size, 4 Threads
Files/s > Higher Is Better
Linux 4.7: Single Disk ... 50.00  |================
Linux 4.7: RAID0 4-Disk .. 141.73 |============================================
Linux 4.7: RAID1 4-Disk .. 60.87  |===================
Linux 4.7: RAID10 4-Disk . 67.60  |=====================
Linux 4.8: Single Disk ... 49.73  |===============
Linux 4.8: RAID0 4-Disk .. 128.87 |========================================
Linux 4.8: RAID1 4-Disk .. 59.87  |===================
Linux 4.8: RAID10 4-Disk . 70.48  |======================


FS-Mark 3.3
Test: 1000 Files, 1MB Size
Files/s > Higher Is Better
Linux 4.7: Single Disk ... 57.35  |=================
Linux 4.7: RAID0 4-Disk .. 128.63 |=======================================
Linux 4.7: RAID1 4-Disk .. 87.97  |==========================
Linux 4.7: RAID10 4-Disk . 39.50  |============
Linux 4.8: Single Disk ... 62.43  |===================
Linux 4.8: RAID0 4-Disk .. 146.72 |============================================
Linux 4.8: RAID1 4-Disk .. 54.28  |================
Linux 4.8: RAID10 4-Disk . 68.98  |=====================


Flexible IO Tester 2.1.13
Type: Sequential Write - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory - Result: MB/s
MB/s > Higher Is Better
Linux 4.7: Single Disk ... 98.53  |======================
Linux 4.7: RAID0 4-Disk .. 162.02 |====================================
Linux 4.7: RAID1 4-Disk .. 116.01 |==========================
Linux 4.7: RAID10 4-Disk . 90.71  |====================
Linux 4.8: Single Disk ... 98.49  |======================
Linux 4.8: RAID0 4-Disk .. 195.51 |============================================
Linux 4.8: RAID1 4-Disk .. 137.09 |===============================
Linux 4.8: RAID10 4-Disk . 130.02 |=============================


Flexible IO Tester 2.1.13
Type: Sequential Write - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory - Result: IOPS
IOPS > Higher Is Better
Linux 4.7: Single Disk ... 24820 |======================
Linux 4.7: RAID0 4-Disk .. 38625 |==================================
Linux 4.7: RAID1 4-Disk .. 26303 |=======================
Linux 4.7: RAID10 4-Disk . 24596 |======================
Linux 4.8: Single Disk ... 22009 |===================
Linux 4.8: RAID0 4-Disk .. 51224 |=============================================
Linux 4.8: RAID1 4-Disk .. 33213 |=============================
Linux 4.8: RAID10 4-Disk . 33819 |==============================


Flexible IO Tester 2.1.13
Type: Sequential Read - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory - Result: MB/s
MB/s > Higher Is Better
Linux 4.7: Single Disk ... 248.70 |===============
Linux 4.7: RAID0 4-Disk .. 738.69 |============================================
Linux 4.7: RAID1 4-Disk .. 464.23 |============================
Linux 4.7: RAID10 4-Disk . 655.82 |=======================================
Linux 4.8: Single Disk ... 459.41 |===========================
Linux 4.8: RAID0 4-Disk .. 698.27 |==========================================
Linux 4.8: RAID1 4-Disk .. 459.30 |===========================
Linux 4.8: RAID10 4-Disk . 552.75 |=================================


Flexible IO Tester 2.1.13
Type: Sequential Read - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory - Result: IOPS
IOPS > Higher Is Better
Linux 4.7: Single Disk ... 61515  |===============
Linux 4.7: RAID0 4-Disk .. 181495 |============================================
Linux 4.7: RAID1 4-Disk .. 114380 |============================
Linux 4.7: RAID10 4-Disk . 162847 |=======================================
Linux 4.8: Single Disk ... 115278 |============================
Linux 4.8: RAID0 4-Disk .. 182660 |============================================
Linux 4.8: RAID1 4-Disk .. 114843 |============================
Linux 4.8: RAID10 4-Disk . 137363 |=================================