disk-test-zfs-sync-enabled Intel Core i7-7700 testing with a Gigabyte Z170XP-SLI-CF (F22f BIOS) and eVGA NVIDIA GeForce GTX 660 2GB on Ubuntu 19.04 via the Phoronix Test Suite. trying to determine if a SLOG would help part one: Processor: Intel Core i7-7700 @ 4.20GHz (4 Cores / 8 Threads), Motherboard: Gigabyte Z170XP-SLI-CF (F22f BIOS), Chipset: Intel Xeon E3-1200 v6/7th, Memory: 32768MB, Disk: 2 x 5001GB TOSHIBA HDWE150 + 5001GB TOSHIBA MD04ACA5 + 40GB INTEL SSDSA2M040, Graphics: eVGA NVIDIA GeForce GTX 660 2GB (324/324MHz), Audio: Realtek ALC1150, Monitor: SyncMaster, Network: Intel I219-V + Qualcomm Atheros AR5418 OS: Ubuntu 19.04, Kernel: 5.0.0-20-generic (x86_64), Desktop: GNOME Shell 3.32.0, Display Server: X Server 1.20.4, Display Driver: NVIDIA 418.56, Compiler: GCC 8.3.0, File-System: zfs, Screen Resolution: 3840x1779 SQLite 3.22 Timed SQLite Insertions Seconds < Lower Is Better trying to determine if a SLOG would help part one . 358.10 |=================== FS-Mark 3.3 Test: 1000 Files, 1MB Size Files/s > Higher Is Better trying to determine if a SLOG would help part one . 15.67 |==================== FS-Mark 3.3 Test: 5000 Files, 1MB Size, 4 Threads Files/s > Higher Is Better trying to determine if a SLOG would help part one . 19.80 |==================== FS-Mark 3.3 Test: 4000 Files, 32 Sub Dirs, 1MB Size Files/s > Higher Is Better trying to determine if a SLOG would help part one . 18.01 |==================== FS-Mark 3.3 Test: 1000 Files, 1MB Size, No Sync/FSync Files/s > Higher Is Better trying to determine if a SLOG would help part one . 1302.90 |================== Dbench 4.0 12 Clients MB/s > Higher Is Better trying to determine if a SLOG would help part one . 61.47 |==================== Dbench 4.0 1 Clients MB/s > Higher Is Better trying to determine if a SLOG would help part one . 24.65 |==================== Compile Bench 0.6 Test: Compile MB/s > Higher Is Better trying to determine if a SLOG would help part one . 628.68 |=================== Compile Bench 0.6 Test: Initial Create MB/s > Higher Is Better trying to determine if a SLOG would help part one . 136.26 |=================== Compile Bench 0.6 Test: Read Compiled Tree MB/s > Higher Is Better trying to determine if a SLOG would help part one . 991.80 |=================== PostMark 1.51 Disk Transaction Performance TPS > Higher Is Better trying to determine if a SLOG would help part one . 194 |======================