On 04/17/2017 09:22 PM, Imran Geriskovan wrote: > [...] > > Going over the thread following questions come to my mind: > > - What exactly does btrfs ssd option does relative to plain mode? There's quite an amount of information in the the very recent threads: - "About free space fragmentation, metadata write amplification and (no)ssd" - "BTRFS as a GlusterFS storage back-end, and what I've learned from using it as such." - "btrfs filesystem keeps allocating new chunks for no apparent reason" - ... and a few more I suspect there will be some "summary" mails at some point, but for now, I'd recommend crawling through these threads first. And now for your instant satisfaction, a short visual guide to the difference, which shows actual btrfs behaviour instead of our guesswork around it (taken from the second mail thread just mentioned): -o ssd: https://syrinx.knorrie.org/~knorrie/btrfs/keep/2017-01-19-noautodefrag-ichiban.mp4 -o nossd: https://syrinx.knorrie.org/~knorrie/btrfs/keep/2017-04-08-ichiban-walk-nossd.mp4 -- Hans van Kranenburg -- 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
