On Thu, Jul 21, 2016 at 1:19 AM, Qu Wenruo <quwenruo@xxxxxxxxxxxxxx> wrote: > > > No more. > > The dump is already good enough for me to dig for some time. > > We don't usually get such large extent tree dump from a real world use case. > > It would help us in several ways, from determine how fragmented a block > group is to determine if a defrag will help. > > Thanks, > Qu > > Hello there, have you found anything good since then? With a default system, the behavior is pretty much still the same, though I have not recreated the partitions since. Defrag helps, but I think balance helps even more. clear_cache may help too, but I'm not really sure as I've not tried it on its own. I was actually able to get a 4TB partition on a 5400rpm HDD to mount in around 500ms, quite faster that even some Gb partitions I have on SSDs! Alas I wrote some files to it and it's taking over a second again, so no more magic there. The workarounds do work, so it's still not a major issue, but they're slow and sometimes I have to workaround the "no space left on device" which then takes even more time. Thank you! John -- 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
