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:
Udo
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