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Added benchmark on H64 as DAS

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Aditya Prayoga 2020-03-16 17:09:16 +07:00
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docs/helios64/usb.md
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@ -465,6 +465,30 @@ sdb 1:0:0:0 disk ATA TOSHIBA MQ04ABF1 0J sata
sdc 2:0:0:0 disk Linux File-Stor Gadget 0404 usb
```
## Benchmark
Simple test to measure Helios64 throughput when being used as DAS.
Helios64 configured as DAS with various disks configuration and then connected to a PC running Ubuntu 18.04.
For raw device access, following command is used:
`sudo dd if=/dev/sdc of=/dev/null bs=10M iflag=direct status=progress`
For access on top of EXT4 filesystem, following command is used:
`dd if=/media/kobol/67d5fe3b-2d54-4770-9317-e30f1fd7c2e9/dd_test_data.dat of=/dev/null bs=10M iflag=direct status=progress`
*dd_test_data.dat* file size is 20GB.
### Result
Read transfer rate in MB/s
| Configuration | Raw Device | EXT4 FS |
|---------------|------------|---------|
| 1 SATA | 316 | 313 |
| 5 Disks as RAID6 | 318 | 322 |
| 4 Disks as RAID10 | 321 | 311 |
## References
[1] https://www.kernel.org/doc/html/v5.4/usb/mass-storage.html