Max Schettler posted on Thu, 19 Feb 2015 12:49:37 +0100 as excerpted: > I recently was looking for the status of hot relocation on btrfs. > There seemed to be some activity on the mailinglist around 5/2013 > regarding patches that should provide the functionality. > However they have not been merged yet and there hasn`t been further > discussion about them (to my knowledge). > What is the status of hot relocation? The current suggestion is to use something like bcache or dmcache in tandem with btrfs. I'm not sure of dmcache/btrfs status, but there are people actually using bcache/btrfs here on this list, with the reports I've read generally very positive. Longer term, the feature in various forms remains on the wiki's project ideas page, here: https://btrfs.wiki.kernel.org/index.php/Project_ideas However, as can be seen on that page, btrfs is definitely not lacking in ideas for future development, rather the reverse, and unfortunately btrfs in general has a history of wildly optimistic feature ETAs, tho they do eventually come online, with raid56 mode being the most recent example. That being the case and with none of the variants of the suggestion already formally claimed and in-progress, I'd suggest checking back in 3-5 years... unless of course this is a feeler and you're proposing to claim and implement it yourself. =:^) There's also this rather vague comment on the wiki, on the main page, under Features, additional features in development or planned (so closer to News, then scroll up a bit)... * Hot data tracking and moving to faster devices (currently being pushed as a generic feature available through VFS) https://btrfs.wiki.kernel.org/index.php/Main_Page#News (and scroll up a bit) I'm not sure if that refers to bcache and similar, or something else, tho I didn't check the talk and history pages, which may have a hint... -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
