Graham Cobb posted on Mon, 28 Nov 2016 09:49:33 +0000 as excerpted: > On 28/11/16 02:56, Duncan wrote: >> It should still be worth turning on autodefrag on an existing somewhat >> fragmented filesystem. It just might take some time to defrag files >> you do modify, and won't touch those you don't, which in some cases >> might make it worth defragging those manually. Or simply create new >> filesystems, mount them with autodefrag, and copy everything over so >> you're starting fresh, as I do. > > Could that "copy" be (a series of) send/receive, so that snapshots and > reflinks are preserved? Does autodefrag work in that case or does the > send/receive somehow override that and end up preserving the original > (fragmented) extent structure? Very good question that I don't know the answer to as I've not seen it discussed previously. (I'm not a dev, just a list regular and user of btrfs myself, and my personal use-case involves neither snapshots nor send/receive, so on those topics if I've not seen it covered previously either here or on the wiki, I won't know.) Someone else know? -- 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
