tobert/disk-latency-benchmarking

Disk Latency Benchmarking

I'm working on a couple talks and blog posts about disk latency. This repo contains a mix of scripts, notes, configurations, and generated data used in the process.

Scripts

There are a couple scripts in the scripts/ directory. More to come as I generate graphs, etc..

latstat.pl - simple prototype to display data from /proc/diskstats log2json.pl - quick & dirty fio log to JSON converter

Setup

My hardware setup is on my blog at http://albertptobey.blogspot.com/2014/03/benchmarking-disk-latency-setup.html

For posterity it is:

Component	Quantity	Description
Case	1	Cooler Master HAF XB
Power Supply	1	COOLMAX CU series CU-700B 700W
Motherboard	1	Intel S1200BTL
CPU	1	Intel Xeon E31270 3.4Ghz
Memory	4	Kingston KVR1333D3E9SK2
Root Drive	2	Seagate ST9500530NS Enterprise SATA
Graphics	1	XFX Radeon 6450 2GB
PCIe SSD	1	FusionIO ioDrive II
PCIe SAS	1	LSI Logic LSI00346 9300-4i SGL
SAS chassis	1	Thermaltake RC1400101A MAX-1542

Drives

Samsung 840 Pro 128GB (2.5" SATA SSD)

FusionIO ioDrive II (PCIe 8x SSD)

Western Digital WD2500KS (3.5" SATA 7,200RPM)

Seagate ST9500430SS (2.5" SAS, will also test RAID10 on these)

Western Digital Velociraptor WD3000BLFS (2.5" SATA 10,000RPM)

Western Digital WD5002AALX (3.5" SATA 7,200RPM, also RAID1)