SSD vs ZFS HDDs
Intel Core i5-4690K testing with a ASUS Z97-E (0803 BIOS) and Intel Xeon E3-1200 v3/4th Gen Core IGP on Ubuntu 18.04 via the Phoronix Test Suite.


SSD: 

	Processor: Intel Core i5-4690K @ 3.90GHz (4 Cores), Motherboard: ASUS Z97-E (0803 BIOS), Chipset: Intel 4th Gen Core DRAM, Memory: 20480MB, Disk: 4001GB Western Digital WD40EFRX-68W + 4 x 4001GB Western Digital WD40EFRX-68N + 250GB Crucial_CT250MX2, Graphics: Intel Xeon E3-1200 v3/4th Gen Core IGP (1200MHz), Audio: Intel Xeon E3-1200 v3/4th, Monitor: Philips 170S, Network: Intel I218-V

	OS: Ubuntu 18.04, Kernel: 4.15.0-58-generic (x86_64), Display Server: X Server 1.19.6, Display Driver: modesetting 1.19.6, Compiler: GCC 7.4.0, File-System: ext4, Screen Resolution: 1920x1200

ZFS Mirror: 

	Processor: Intel Core i5-4690K @ 3.90GHz (4 Cores), Motherboard: ASUS Z97-E (0803 BIOS), Chipset: Intel 4th Gen Core DRAM, Memory: 20480MB, Disk: 4001GB Western Digital WD40EFRX-68W + 4 x 4001GB Western Digital WD40EFRX-68N + 250GB Crucial_CT250MX2, Graphics: Intel Xeon E3-1200 v3/4th Gen Core IGP (1200MHz), Audio: Intel Xeon E3-1200 v3/4th, Monitor: Philips 170S, Network: Intel I218-V

	OS: Ubuntu 18.04, Kernel: 4.15.0-58-generic (x86_64), Display Server: X Server 1.19.6, Display Driver: modesetting 1.19.6, Compiler: GCC 7.4.0, File-System: zfs, Screen Resolution: 1920x1200


SQLite 3.22
Timed SQLite Insertions
Seconds < Lower Is Better
SSD ........ 86.08  |=================
ZFS Mirror . 299.63 |==========================================================


Flexible IO Tester 3.1
Type: Random Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 2MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
SSD . 476 |====================================================================


Flexible IO Tester 3.1
Type: Random Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
MB/s > Higher Is Better
SSD . 355 |====================================================================


Flexible IO Tester 3.1
Type: Random Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
IOPS > Higher Is Better
SSD . 90967 |==================================================================


Flexible IO Tester 3.1
Type: Random Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 2MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
SSD . 474 |====================================================================


Flexible IO Tester 3.1
Type: Random Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
MB/s > Higher Is Better
SSD . 315 |====================================================================


Flexible IO Tester 3.1
Type: Random Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
IOPS > Higher Is Better
SSD . 80773 |==================================================================


Flexible IO Tester 3.1
Type: Sequential Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 2MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
SSD . 297 |====================================================================


Flexible IO Tester 3.1
Type: Sequential Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
MB/s > Higher Is Better
SSD . 305 |====================================================================


Flexible IO Tester 3.1
Type: Sequential Read - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
IOPS > Higher Is Better
SSD . 77767 |==================================================================


Flexible IO Tester 3.1
Type: Sequential Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 2MB - Disk Target: Default Test Directory
MB/s > Higher Is Better
SSD . 438 |====================================================================


Flexible IO Tester 3.1
Type: Sequential Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
MB/s > Higher Is Better
SSD . 347 |====================================================================


Flexible IO Tester 3.1
Type: Sequential Write - IO Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory
IOPS > Higher Is Better
SSD . 88720 |==================================================================


FS-Mark 3.3
Test: 1000 Files, 1MB Size
Files/s > Higher Is Better
SSD ........ 96.73 |===========================================================
ZFS Mirror . 43.33 |==========================


FS-Mark 3.3
Test: 5000 Files, 1MB Size, 4 Threads
Files/s > Higher Is Better
SSD ........ 179.93 |==========================================================
ZFS Mirror . 39.93  |=============


FS-Mark 3.3
Test: 4000 Files, 32 Sub Dirs, 1MB Size
Files/s > Higher Is Better
SSD ........ 65.34 |===========================================================
ZFS Mirror . 43.13 |=======================================


FS-Mark 3.3
Test: 1000 Files, 1MB Size, No Sync/FSync
Files/s > Higher Is Better
SSD ........ 2335 |============================================================
ZFS Mirror . 1718 |============================================


Dbench 4.0
12 Clients
MB/s > Higher Is Better
SSD ........ 472 |=============================================================
ZFS Mirror . 128 |=================


Dbench 4.0
1 Clients
MB/s > Higher Is Better
SSD ........ 51.89 |===========================================================
ZFS Mirror . 30.37 |===================================


Compile Bench 0.6
Test: Compile
MB/s > Higher Is Better
SSD ........ 783  |=============================
ZFS Mirror . 1599 |============================================================


Compile Bench 0.6
Test: Initial Create
MB/s > Higher Is Better
SSD ........ 462 |=============================================================
ZFS Mirror . 216 |=============================


Compile Bench 0.6
Test: Read Compiled Tree
MB/s > Higher Is Better
SSD ........ 2392 |============================================================
ZFS Mirror . 1215 |==============================


PostMark 1.51
Disk Transaction Performance
TPS > Higher Is Better
SSD ........ 5769 |============================================================
ZFS Mirror . 1096 |===========