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We have benchmarked a variety of products from many SAN vendors. Table 9-3 shows a selection of typical results at low concurrency.
Table 9-3. Synchronous single-threaded 16 KB operations per second on a 4 GB file
|
Device |
Sequential write |
Sequential read |
Random write |
Random read |
|---|---|---|---|---|
|
SAN1 with RAID 5 |
2428 |
5794 |
629 |
258 |
|
SAN1 with RAID 10 |
1765 |
3427 |
1725 |
213 |
|
SAN2 over NFS |
1768 |
3154 |
2056 |
166 |
|
10k RPM hard drives, RAID 1 |
7027 |
4773 |
2302 |
310 |
|
Intel SSD |
3045 |
6266 |
2427 |
4397 |
The exact SAN vendors and configurations shall remain a secret,
although we can reveal that these are not low-budget SANs. We ran these
benchmarks with synchronous 16 KB
operations, which emulates the way that InnoDB operates when configured
in O_DIRECT mode.