Hay everyone!
I'm run some test on LSI MegaRAID 9271-8iCC RAID card w/CacheCase Pro 2.0 by using Samsung 256GB 840 Pro as SSD cache
and Raid 10 4x Seagate Constellation ES 2 TB , what i get?
[root@xxxx]# ./ioping . -c 10
4096 bytes from . (ext4 /dev/sda2): request=1 time=0.1 ms
4096 bytes from . (ext4 /dev/sda2): request=2 time=0.1 ms
4096 bytes from . (ext4 /dev/sda2): request=3 time=0.7 ms
4096 bytes from . (ext4 /dev/sda2): request=4 time=0.8 ms
4096 bytes from . (ext4 /dev/sda2): request=5 time=0.9 ms
4096 bytes from . (ext4 /dev/sda2): request=6 time=0.7 ms
4096 bytes from . (ext4 /dev/sda2): request=7 time=0.9 ms
4096 bytes from . (ext4 /dev/sda2): request=8 time=0.8 ms
4096 bytes from . (ext4 /dev/sda2): request=9 time=0.9 ms
4096 bytes from . (ext4 /dev/sda2): request=10 time=0.7 ms
--- . (ext4 /dev/sda2) ioping statistics ---
10 requests completed in 9008.5 ms, 1537 iops, 6.0 mb/s
min/avg/max/mdev = 0.1/0.7/0.9/0.3 ms
[root@xxxx]# ./ioping . -R
--- . (ext4 /dev/sda2) ioping statistics ---
15164 requests completed in 3000.1 ms, 7108 iops, 27.8 mb/s
min/avg/max/mdev = 0.0/0.1/3.4/0.1 ms
how it can be possible very slow and i using SSD cache? i get better from busy server SAS Raid10 ,maybe i missed something at installing?