Re: btrfs und lvm-cache?

["Holger Hoffstätte" <holger.hoffstaette@googlemail.com>]

On 12/23/15 21:07, Neuer User wrote:
> Understood. However, do SSDs really do automatic deduplication? I might
> be completely wrong here, but that sounds to be a rather complex
> mechanism, requiring lots of RAM to deduplicate 100 GB. I wouldn't have
> thought that typical SSDs include that?

tl;dr: no, because delta encoding/write buffer coalescing is not dedupe.

This is one of those persistent myth that has been kept alive by the
internet rumor machine. It has its roots in a series of blog articles [1]
and turned out to be panic coupled with FUD and fueled by a lack of factual
information.

I suggest everyone read the article(s), ALL the comments and then get back
to drinking. :o)

In SSD arrays dedupe is generally seen as a good thing.

-h

[1] http://storagemojo.com/2011/06/27/de-dup-too-much-of-good-thing/