FusionIO 320GB MLC benchmarks

January 12, 2010

Author

Vadim Tkachenko

Benchmarks

MySQL

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After my previous benchmarks of FusionIO 160GB SLC card, FusionIO team sent me for the tests another card, FusionIO 320GB MLC. I should say I really appreciate an opportunity to play with this card and with combination of two cards.

This card is also not cheap, the price I can find on dell.com is $6,829.99, which is almost the same as for 160GB card, but with doubled space,
and which gives me 21$/GB for 100% formatted card, and 29$/GB for card with 75% of space allocated. Effect of 25% reserved space you will see in the results.

The full numbers are available on our Wiki benchmarks page, couple words about benchmarks.

I did sysbench fileio runs on 100% space allocated card and on 75% space allocated (240GB of
available disk space), and on 32GB and 100GB filesizes. After that I took two cards into software RAID0, and tried 100GB filesize in this configuration. Block size is 16KB in all cases.

The results for random write is here:
(Results are in MB/s (more is better) for random write test, pagesize 16KB )

threads	32GB filesize, 100% space formatted	32GB filesize, 75% space formatted	32GB filesize, SLC	100GB filesize, 75% space formatted	100GB filesize, RAID0 over 2 cards
1	83.917	148	134.33	149.33	132.91
4	130.83	418.88	443.59	411.02	430.45
8	177.34	475.17	566.54	455.25	692.58
16	161.74	488.64	554.73	472.3	784.31
32	150.9	491.41		457.6	718.81
64	146.08	486.97		387.17	740.21

or in chart form:
fusionio,_random_write,_16kb

(if legend is unreadable, it is:

32GB filesize, 100% space formatted

32GB filesize, 75% space formatted

100GB filesize, 75% space formatted

100GB filesize, RAID0 over 2 cards

I hope Google Docs will fix the issue with font for the legend sometime
)

So there some numbers to consider:

With 25% reserved space you can get almost 3x throughput even with
small enough files

SLC card gives about 15-20% more in throughput

With 25% reserved space, I was able to get 700 MB/s in sequential reads ( 400 MB/s in random reads) and 500 MB/s for random writes.

95% response time in most cases are impressive, very often it is < 1ms (in hundreds microseconds range)

Sequential writes still behave strange, dropping throughput with increased concurrency

To get most from card you need multi-threaded IO (4-16 threads)

With RAID0 you can get doubled space with very interesting numbers, 750 MB/s in random reads and 800 MB/s in random writes ( and 1.2GB/s in sequential reads)