bcache_vs_lvmcache default lvmcache zfs sync = standard primarycache=all bcache_default: Processor: Intel Core i5-4590 @ 3.70GHz (4 Cores), Motherboard: MSI Z97-G43 (MS-7816) v3.0, Chipset: Intel 4th Gen Core DRAM, Memory: 2048MB, Disk: 2 x 4001GB Western Digital WD40EFRX-68W + 240GB ADATA SP550 + 240GB INTEL SSDSC2BW24, Graphics: Intel HD 4600, Audio: Intel Xeon E3-1200 v3/4th, Network: Realtek RTL8111/8168/8411 OS: Ubuntu 16.04, Kernel: 4.4.0-21-generic (x86_64), Desktop: Xfce 4.12, Display Server: X Server 1.18.3, Display Driver: intel 2.99.917, Compiler: GCC 5.4.0 20160609, File-System: overlayfs, Screen Resolution: 2560x1440 lvmcache_default: Processor: Intel Core i5-4590 @ 3.70GHz (4 Cores), Motherboard: MSI Z97-G43 (MS-7816) v3.0, Chipset: Intel 4th Gen Core DRAM, Memory: 2048MB, Disk: 2 x 4001GB Western Digital WD40EFRX-68W + 240GB ADATA SP550 + 240GB INTEL SSDSC2BW24, Graphics: Intel HD 4600, Audio: Intel Xeon E3-1200 v3/4th, Network: Realtek RTL8111/8168/8411 OS: Ubuntu 16.04, Kernel: 4.4.0-21-generic (x86_64), Desktop: Xfce 4.12, Display Server: X Server 1.18.3, Display Driver: intel 2.99.917, Compiler: GCC 5.4.0 20160609, File-System: overlayfs, Screen Resolution: 2560x1440 AIO-Stress 0.21 Test: Random Write MB/s > Higher Is Better bcache_default ... 702.56 |==================================================== lvmcache_default . 579.86 |=========================================== Flexible IO Tester 2.1.11 Test: Example Network Job - Disk Target: Default Test Directory Seconds (Run Time) < Lower Is Better bcache_default ... 24.77 |================================================= lvmcache_default . 27.01 |===================================================== Flexible IO Tester 2.1.11 Test: Intel IOMeter File Server Access Pattern - Disk Target: Default Test Directory Seconds (Run Time) < Lower Is Better bcache_default ... 76.34 |====================================== lvmcache_default . 103.15 |==================================================== SQLite 3.8.10.2 Test Target: Default Test Directory Seconds < Lower Is Better bcache_default ... 37.45 |======= lvmcache_default . 286.09 |==================================================== FS-Mark 3.3 Test: 1000 Files, 1MB Size Files/s > Higher Is Better bcache_default ... 52.52 |===================================================== lvmcache_default . 18.05 |================== FS-Mark 3.3 Test: 1000 Files, 1MB Size, No Sync/FSync Files/s > Higher Is Better bcache_default ... 278.62 |======================= lvmcache_default . 621.77 |==================================================== Dbench 4.0 Client Count: 1 MB/s > Higher Is Better bcache_default ... 57.64 |===================================================== lvmcache_default . 55.67 |=================================================== IOzone 3.405 Record Size: 4Kb - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better bcache_default ... 856.66 |==================================================== lvmcache_default . 842.92 |=================================================== IOzone 3.405 Record Size: 4Kb - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better bcache_default ... 142.96 |======================== lvmcache_default . 314.40 |==================================================== Threaded I/O Tester 20170503 Test: Read - Size Per Thread: 32MB - Thread Count: 4 MB/s > Higher Is Better bcache_default ... 1803.91 |============================================= lvmcache_default . 2037.13 |=================================================== Threaded I/O Tester 20170503 Test: Write - Size Per Thread: 32MB - Thread Count: 4 MB/s > Higher Is Better bcache_default ... 1.93 |====================================================== lvmcache_default . 1.41 |======================================= Threaded I/O Tester 20170503 Test: Random Read - Size Per Thread: 32MB - Thread Count: 4 MB/s > Higher Is Better bcache_default ... 3433.09 |=================================================== lvmcache_default . 3303.92 |================================================= Threaded I/O Tester 20170503 Test: Random Write - Size Per Thread: 32MB - Thread Count: 4 MB/s > Higher Is Better bcache_default ... 14.09 |=========== lvmcache_default . 70.81 |===================================================== Compile Bench 0.6 Test: Compile MB/s > Higher Is Better bcache_default ... 638.64 |==================================================== lvmcache_default . 445.67 |==================================== Compile Bench 0.6 Test: Initial Create MB/s > Higher Is Better bcache_default ... 204.36 |==================================================== lvmcache_default . 137.52 |=================================== Compile Bench 0.6 Test: Read Compiled Tree MB/s > Higher Is Better bcache_default ... 600.52 |==================================================== lvmcache_default . 548.14 |=============================================== PostMark 1.51 Disk Transaction Performance TPS > Higher Is Better bcache_default ... 512 |======================================================= lvmcache_default . 325 |=================================== PostgreSQL pgbench 9.6.3 Scaling: On-Disk - Test: Normal Load - Mode: Read Write TPS > Higher Is Better bcache_default ... 119.84 |=============================== lvmcache_default . 203.32 |==================================================== PostgreSQL pgbench 9.6.3 Scaling: Mostly RAM - Test: Normal Load - Mode: Read Write TPS > Higher Is Better bcache_default ... 350.49 |==================================================== lvmcache_default . 118.14 |================== PostgreSQL pgbench 9.6.3 Scaling: Buffer Test - Test: Normal Load - Mode: Read Write TPS > Higher Is Better bcache_default ... 761.57 |==================================================== lvmcache_default . 229.57 |================ PostgreSQL pgbench 9.6.3 Scaling: On-Disk - Test: Heavy Contention - Mode: Read Write TPS > Higher Is Better bcache_default ... 189.12 |========================================== lvmcache_default . 231.79 |====================================================