Performancetest with SSD

udo

Distinguished Member
Apr 22, 2009
5,975
196
163
Ahrensburg; Germany
Hi,
i had the chance to made some tests with 3 Intel SSDs (SLC), which will be used as Spool-Disks for backups (many writes and one fast read to support a LTO-4 drive).

Here my results - perhaps interesting for other peoples:
Code:
Testmachine: ASUS M4A79T with 8GB-DDR3-ECC RAM, AMD 945 and ARC1222 Raidcontroller - with proxmox 1.5 (ext3-Filesystem)

test:
read  = pveperf
write = dd if=/dev/zero of=bigfile bs=1024k count=8192 conv=fdatasync
mysql = import of a 14GB SQL-File in OpenVZ-VM (mysql -u root -p < bac.sql)
bsp   = backup-spool-performance: fill 10 (simultaneous) files with 1GB, concurrently read file by file
        (and delete them after that). The test run min. 1 hour. Read performance was noted (=avarage +max -min).

mysql and bsp are more "real live" tests than read/write

conf:
SSD   = SSD connected to the motherboard
SSD_PT= SSD connected to raid controller as pass through (write back)

SSD   = Intel X25-E 64GB
SAS   = Seagate Cheetah 15k.6 146GB
SATA  = Hitachi Ultrastar 1TB


All values MB/s!

test/conf |   3SSD_raid0  |   3SAS_raid0   |  3SATA_raid0  |   3SSD_raid5  |   2SSD_raid0  |      1SSD     |   1SSD_PT
----------+---------------+----------------+---------------+---------------+---------------+---------------+--------------
read      |    663.78     |     463.63     |     371.35    |     641.69    |     461.35    |      192.36   |    224.46
----------+---------------+----------------+---------------+---------------+---------------+---------------+--------------
write     |    280        |     303        |     286       |     216       |     208       |      141      |    117
----------+---------------+----------------+---------------+---------------+---------------+---------------+--------------
msyql     |   40m32.293s  |   46m28.131s   |   54m20.057s  |   43m28.182s  |   41m31.858s  |   57m57.693s  |  45m35.556s
----------+---------------+----------------+---------------+---------------+---------------+---------------+--------------
bsp       | =311 +684 -92 | =218 +461 -28  | =211 +378 -23 | =186 +652 -38 |   not tested  |  =94 +219 -40 | =105 +244 -36
Udo
 
Thanks Udo!

Now if you could do that with RAID10 and demonstrate how 4, 8 and 16 disks perform, I would be very appreciative :) :)
 
Thanks Udo!

Now if you could do that with RAID10 and demonstrate how 4, 8 and 16 disks perform, I would be very appreciative :) :)
Hi,
of course... but then i need a sponsor ;) and the raid controller support "only" 8 disks - but i think 8 SSDs in raid10 will be not the slowest.

BTW i had made one more test with a OCZ-SSD (vortex2) - MLC, but a new controller. The SSD costs half of the X25-E and has 100GB instead of 64GB. The Values must be compared with 1SSD_PT.
The result are not too bad.
Code:
test/conf |    1OCZ_PT    |  
----------+---------------+
read      |    233.48     |   
----------+---------------+
write     |    183        | 
----------+---------------+
msyql     |   40m52.212s  | 
----------+---------------+
bsp       | =159 +251 -62 |

Udo
 
I've been thinking about using the intel SSD's for my virtual machines that hosts DB's. Think it's worth it?
 
I've been thinking about using the intel SSD's for my virtual machines that hosts DB's. Think it's worth it?
Hi,
i think due the low seek time SSDs are the best for DBs. But my tests shows that makes more sense with an fast raid controller.
I'm suprised about the performance of the OCZ Vortex2 100GB - but i have only one of them... perhaps someone else has such disks in a raid-scenario?

Udo
 
Last edited:

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