I'm interested in getting a dedicated server with a SSD, probably Corsair Force series CSSD-F120GB2-BRKT.
It'll be an Linux server, most likely running XFS (but I'm open to other alternatives).
Many articles (as well as the Corsair website) all suggested that it's necessary to "4K align" the file system in order to get the highest performance from SSD.
What does "4K align" means? How do I do that?
On a related note, I'm using this server to run a website that's heavy on RDBMS usage. Is a SSD like Corsair Force truly persistent? If I flush data to the SSD is it truly written to the SSD or does the SSD cheat by caching the data?