[jetz]

If you're familiar with thumbnail display you know Facebook has Haystack for efficient image serving. It goes very low end. Sparkey or CDB or BAM (mentioned in this post) could be much less complex and can do similar work. Why did they go Haystack route I dont get it.

[seiji]

Are you asking why they didn't use Haystack? Haystack isn't released publicly as far as I can tell (plus, just because another company writes something doesn't mean it's actually good).

[jeltz]

No, I think he is asking why Facebook isn't using something like CDB.

[jetz]

Sorry not being clear enough. Yes I was kind of asking why they didnt try simpler options. When you look at their paper on Haystack you see that it's essentially a constant local database.