在Hack7MC的一篇文章引起了我的眼睛几个月前, 但我才刚刚得到周围就可以跟进. 这个想法是由它的库迁移到低价加快Media Center中的媒体浏览器插件 USB 闪存驱动器, 它希望提供比普通硬盘驱动器更好的性能. 我做的第一件事是测试一对夫妇，我有对我的台式机硬盘基于闪存的设备...
WD VelociRaptor (300Gig)
random 4k read = 0.9mb/s
random 512k read = 57mb/s
Super Talent Pico‑C 8Gig
random 4k read = 8.2mb/s
random 512kb read = 34.6mb/s
SanDisk Extreme III SDHC 8Gig
random 4k read = 4.6mb/s
random 512kb read = 20.45mb/s
Corsair Flash Voyager 8Gb
random 4k read = 8.13mb/s
random 512kb read = 30.41mb/s
I have been led to understand that the 4k measurements are the most important values, however I would like an explanation of why this is the case.
The average file size in my media browser image library is ~42kb so they are relatively small files, which I believe is relevant
For comparison of a lot more pen drives there is a recent review (2009) 在 Ars Technica
The corsair drive from the ars review is currently on ebay for around £16 — I wonder how much of a performance increase it offers
- The corsair drive from the ars review turned out to be fractionally slower (effectively on par with) the Pico‑C
- The average files in my Media Browser library are now 610kb. They range from 5kb to 2mb.
- USB 2.0 is theoretically limited to 60mb/s, and in practice seems limited to 30mb/s
- Without USB 3.0, or an internal (e.g. SATA) 固态硬盘 I am skeptical that any realistic speed-up can be gained with this method. Using an SQL database for Media Browser may offer a substantial speed up, and the database can easily be hosted on a 内存 drive for an additional increase
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