Intel SSD drives perf

gistfile1.txt

Two INTEL SSDSA2CW300G3 in RAID 0 array

> tiotest -t 8 -f 2048 -r 500 -b 4096 -d /mnt/test
Tiotest results for 8 concurrent io threads:
,----------------------------------------------------------------------.
| Item                  | Time     | Rate         | Usr CPU  | Sys CPU |
+-----------------------+----------+--------------+----------+---------+
| Write       16384 MBs |   39.3 s | 416.452 MB/s | 298.5 %  | 229.5 % |
| Random Write   16 MBs |    0.3 s |  53.267 MB/s |  35.4 %  | 134.0 % |
| Read        16384 MBs |    3.1 s | 5348.594 MB/s | 4770.1 %  | 1515.4 % |
| Random Read    16 MBs |    0.0 s | 5210.070 MB/s | 4534.3 %  | 1600.3 % |
`----------------------------------------------------------------------'
Tiotest latency results:
,-------------------------------------------------------------------------.
| Item         | Average latency | Maximum latency | % >2 sec | % >10 sec |
+--------------+-----------------+-----------------+----------+-----------+
| Write        |        0.004 ms |        1.147 ms |  0.00000 |   0.00000 |
| Random Write |        0.004 ms |        0.019 ms |  0.00000 |   0.00000 |
| Read         |        0.004 ms |        0.088 ms |  0.00000 |   0.00000 |
| Random Read  |        0.003 ms |        0.014 ms |  0.00000 |   0.00000 |
|--------------+-----------------+-----------------+----------+-----------|
| Total        |        0.004 ms |        1.147 ms |  0.00000 |   0.00000 |
`--------------+-----------------+-----------------+----------+-----------'

Same machine. 

Regular 4 drive RAID10 array - SAS 15k drives

> tiotest -t 8 -f 2048 -r 500 -b 4096 -d /export/test
Tiotest results for 8 concurrent io threads:
,----------------------------------------------------------------------.
| Item                  | Time     | Rate         | Usr CPU  | Sys CPU |
+-----------------------+----------+--------------+----------+---------+
| Write       16384 MBs |   87.9 s | 186.358 MB/s |  73.2 %  | 1607.4 % |
| Random Write   16 MBs |    2.7 s |   5.726 MB/s |   4.1 %  |  10.3 % |
| Read        16384 MBs |    3.1 s | 5323.189 MB/s | 5048.6 %  | 1261.8 % |
| Random Read    16 MBs |    0.0 s | 5245.049 MB/s | 4497.6 %  | 1040.3 % |
`----------------------------------------------------------------------'
Tiotest latency results:
,-------------------------------------------------------------------------.
| Item         | Average latency | Maximum latency | % >2 sec | % >10 sec |
+--------------+-----------------+-----------------+----------+-----------+
| Write        |        0.053 ms |      195.949 ms |  0.00000 |   0.00000 |
| Random Write |        0.006 ms |        0.023 ms |  0.00000 |   0.00000 |
| Read         |        0.003 ms |        0.135 ms |  0.00000 |   0.00000 |
| Random Read  |        0.003 ms |        0.014 ms |  0.00000 |   0.00000 |
|--------------+-----------------+-----------------+----------+-----------|
| Total        |        0.028 ms |      195.949 ms |  0.00000 |   0.00000 |
`--------------+-----------------+-----------------+----------+-----------'