0加快媒体浏览器

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. 我做的第一件事是在我的桌面硬盘驱动器上测试我拥有的几个基于闪存的设备......

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

–update
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

–update

• 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