Btrfs RAID Samsung Linux 4.4
Btrfs RAID 0 and RAID 1 benchmarks on Samsung 850 SSDs with the Linux 4.4 kernel and also with various Btrfs mount options. Tests by Michael Larabel for a future article on Phoronix.com.


Single Disk: 

	Processor: Intel Core i7-5960X @ 3.50GHz (16 Cores), Motherboard: Gigabyte X99-UD4-CF, Chipset: Intel Xeon E7 v3/Xeon, Memory: 16384MB, Disk: 2 x 120GB Samsung SSD 850 + 240GB OCZ VERTEX3, Graphics: MSI AMD Radeon R7 370 / R9 270/370 OEM 4096MB, Audio: Realtek ALC1150, Monitor: DELL P2415Q, Network: Intel Connection

	OS: Ubuntu 15.10, Kernel: 4.4.0-rc2-phoronix (x86_64) 20151123, Desktop: Unity, Display Server: X Server 1.17.2, Display Driver: radeon 7.6.99, OpenGL: 4.1 Mesa 11.1.0-devel (padoka PPA) Gallium 0.4, Compiler: GCC 5.2.1 20151010, File-System: btrfs, Screen Resolution: 3840x2160

2-Disk RAID0: 

	Processor: Intel Core i7-5960X @ 3.50GHz (16 Cores), Motherboard: Gigabyte X99-UD4-CF, Chipset: Intel Xeon E7 v3/Xeon, Memory: 16384MB, Disk: 2 x 120GB Samsung SSD 850 + 240GB OCZ VERTEX3, Graphics: MSI AMD Radeon R7 370 / R9 270/370 OEM 4096MB, Audio: Realtek ALC1150, Monitor: DELL P2415Q, Network: Intel Connection

	OS: Ubuntu 15.10, Kernel: 4.4.0-rc2-phoronix (x86_64) 20151123, Desktop: Unity, Display Server: X Server 1.17.2, Display Driver: radeon 7.6.99, OpenGL: 4.1 Mesa 11.1.0-devel (padoka PPA) Gallium 0.4, Compiler: GCC 5.2.1 20151010, File-System: btrfs, Screen Resolution: 3840x2160

2-Disk RAID1: 

	Processor: Intel Core i7-5960X @ 3.50GHz (16 Cores), Motherboard: Gigabyte X99-UD4-CF, Chipset: Intel Xeon E7 v3/Xeon, Memory: 16384MB, Disk: 2 x 120GB Samsung SSD 850 + 240GB OCZ VERTEX3, Graphics: MSI AMD Radeon R7 370 / R9 270/370 OEM 4096MB, Audio: Realtek ALC1150, Monitor: DELL P2415Q, Network: Intel Connection

	OS: Ubuntu 15.10, Kernel: 4.4.0-rc2-phoronix (x86_64) 20151123, Desktop: Unity, Display Server: X Server 1.17.2, Display Driver: radeon 7.6.99, OpenGL: 4.1 Mesa 11.1.0-devel (padoka PPA) Gallium 0.4, Compiler: GCC 5.2.1 20151010, File-System: btrfs, Screen Resolution: 3840x2160

2-Disk RAID1 + LZO: 

	Processor: Intel Core i7-5960X @ 3.50GHz (16 Cores), Motherboard: Gigabyte X99-UD4-CF, Chipset: Intel Xeon E7 v3/Xeon, Memory: 16384MB, Disk: 2 x 120GB Samsung SSD 850 + 240GB OCZ VERTEX3, Graphics: MSI AMD Radeon R7 370 / R9 270/370 OEM 4096MB, Audio: Realtek ALC1150, Monitor: DELL P2415Q, Network: Intel Connection

	OS: Ubuntu 15.10, Kernel: 4.4.0-rc2-phoronix (x86_64) 20151123, Desktop: Unity, Display Server: X Server 1.17.2, Display Driver: radeon 7.6.99, OpenGL: 4.1 Mesa 11.1.0-devel (padoka PPA) Gallium 0.4, Compiler: GCC 5.2.1 20151010, File-System: btrfs, Screen Resolution: 3840x2160

2-Disk RAID1 + LZO + Nobarrier: 

	Processor: Intel Core i7-5960X @ 3.50GHz (16 Cores), Motherboard: Gigabyte X99-UD4-CF, Chipset: Intel Xeon E7 v3/Xeon, Memory: 16384MB, Disk: 2 x 120GB Samsung SSD 850 + 240GB OCZ VERTEX3, Graphics: MSI AMD Radeon R7 370 / R9 270/370 OEM 4096MB, Audio: Realtek ALC1150, Monitor: DELL P2415Q, Network: Intel Connection

	OS: Ubuntu 15.10, Kernel: 4.4.0-rc2-phoronix (x86_64) 20151123, Desktop: Unity, Display Server: X Server 1.17.2, Display Driver: radeon 7.6.99, OpenGL: 4.1 Mesa 11.1.0-devel (padoka PPA) Gallium 0.4, Compiler: GCC 5.2.1 20151010, File-System: btrfs, Screen Resolution: 3840x2160

2-Disk RAID1 + LZO + Nobarrier + Noatime: 

	Processor: Intel Core i7-5960X @ 3.50GHz (16 Cores), Motherboard: Gigabyte X99-UD4-CF, Chipset: Intel Xeon E7 v3/Xeon, Memory: 16384MB, Disk: 2 x 120GB Samsung SSD 850 + 240GB OCZ VERTEX3, Graphics: MSI AMD Radeon R7 370 / R9 270/370 OEM 4096MB, Audio: Realtek ALC1150, Monitor: DELL P2415Q, Network: Intel Connection

	OS: Ubuntu 15.10, Kernel: 4.4.0-rc2-phoronix (x86_64) 20151123, Desktop: Unity, Display Server: X Server 1.17.2, Display Driver: radeon 7.6.99, OpenGL: 4.1 Mesa 11.1.0-devel (padoka PPA) Gallium 0.4, Compiler: GCC 5.2.1 20151010, File-System: btrfs, Screen Resolution: 3840x2160


SQLite 3.8.10.2
Test Target: Default Test Directory
Seconds < Lower Is Better
Single Disk .............................. 67.63 |=====================
2-Disk RAID0 ............................. 75.98 |========================
2-Disk RAID1 ............................. 87.95 |============================
2-Disk RAID1 + LZO ....................... 91.89 |=============================
2-Disk RAID1 + LZO + Nobarrier ........... 58.84 |===================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 59.13 |===================


Flexible IO Tester 2.1.13
Type: Random Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory - Result: MB/s
MB/s > Higher Is Better
Single Disk .............................. 77.35 |=============================
2-Disk RAID0 ............................. 76.97 |=============================
2-Disk RAID1 ............................. 65.65 |=========================
2-Disk RAID1 + LZO ....................... 65.13 |========================
2-Disk RAID1 + LZO + Nobarrier ........... 65.14 |========================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 67.96 |=========================


Flexible IO Tester 2.1.13
Type: Sequential Write - IO Engine: POSIX AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory - Result: MB/s
MB/s > Higher Is Better
Single Disk .............................. 79.64 |=============================
2-Disk RAID0 ............................. 79.29 |=============================
2-Disk RAID1 ............................. 70.31 |==========================
2-Disk RAID1 + LZO ....................... 70.71 |==========================
2-Disk RAID1 + LZO + Nobarrier ........... 69.71 |=========================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 72.46 |==========================


FS-Mark 3.3
Test: 1000 Files, 1MB Size
Files/s > Higher Is Better
Single Disk .............................. 116.52 |==========
2-Disk RAID0 ............................. 176.13 |================
2-Disk RAID1 ............................. 96.27  |========
2-Disk RAID1 + LZO ....................... 238.10 |=====================
2-Disk RAID1 + LZO + Nobarrier ........... 302.57 |===========================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 317.55 |============================


FS-Mark 3.3
Test: 5000 Files, 1MB Size, 4 Threads
Files/s > Higher Is Better
Single Disk .............................. 102.90 |=====
2-Disk RAID0 ............................. 147.87 |=======
2-Disk RAID1 ............................. 94.13  |=====
2-Disk RAID1 + LZO ....................... 328.68 |================
2-Disk RAID1 + LZO + Nobarrier ........... 466.63 |=======================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 574.18 |============================


FS-Mark 3.3
Test: 4000 Files, 32 Sub Dirs, 1MB Size
Files/s > Higher Is Better
Single Disk .............................. 77.42  |=======
2-Disk RAID0 ............................. 95.47  |========
2-Disk RAID1 ............................. 70.42  |======
2-Disk RAID1 + LZO ....................... 248.03 |======================
2-Disk RAID1 + LZO + Nobarrier ........... 299.95 |===========================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 316.13 |============================


Dbench 4.0
Client Count: 6
MB/s > Higher Is Better
Single Disk .............................. 194.18 |================
2-Disk RAID0 ............................. 177.02 |===============
2-Disk RAID1 ............................. 163.88 |==============
2-Disk RAID1 + LZO ....................... 198.34 |=================
2-Disk RAID1 + LZO + Nobarrier ........... 312.71 |==========================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 332.63 |============================


IOzone 3.405
Record Size: 4Kb - File Size: 8GB - Disk Test: Read Performance
MB/s > Higher Is Better
Single Disk .............................. 6774.63 |======================
2-Disk RAID0 ............................. 6890.33 |======================
2-Disk RAID1 ............................. 6762.72 |======================
2-Disk RAID1 + LZO ....................... 8084.09 |==========================
2-Disk RAID1 + LZO + Nobarrier ........... 8081.60 |==========================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 8393.03 |===========================


IOzone 3.405
Record Size: 4Kb - File Size: 8GB - Disk Test: Write Performance
MB/s > Higher Is Better
Single Disk .............................. 176.46  |==
2-Disk RAID0 ............................. 422.80  |======
2-Disk RAID1 ............................. 175.40  |==
2-Disk RAID1 + LZO ....................... 2045.17 |===========================
2-Disk RAID1 + LZO + Nobarrier ........... 1844.06 |========================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 2006.29 |==========================


Compile Bench 0.6
Test: Initial Create
MB/s > Higher Is Better
Single Disk .............................. 178.24 |=========================
2-Disk RAID0 ............................. 178.43 |=========================
2-Disk RAID1 ............................. 160.34 |=======================
2-Disk RAID1 + LZO ....................... 198.24 |============================
2-Disk RAID1 + LZO + Nobarrier ........... 185.44 |==========================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 197.98 |============================


PostMark 1.51
Disk Transaction Performance
TPS > Higher Is Better
Single Disk .............................. 6148 |==============================
2-Disk RAID0 ............................. 6049 |==============================
2-Disk RAID1 ............................. 6002 |=============================
2-Disk RAID1 + LZO ....................... 5906 |=============================
2-Disk RAID1 + LZO + Nobarrier ........... 5639 |============================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 6000 |=============================


PostgreSQL pgbench 9.4.3
Scaling: On-Disk - Test: Normal Load - Mode: Read Write
TPS > Higher Is Better
Single Disk .............................. 1805.28 |=================
2-Disk RAID0 ............................. 2211.63 |=====================
2-Disk RAID1 ............................. 1736.94 |=================
2-Disk RAID1 + LZO ....................... 2236.63 |======================
2-Disk RAID1 + LZO + Nobarrier ........... 2780.85 |===========================
2-Disk RAID1 + LZO + Nobarrier + Noatime . 2804.63 |===========================