On Thu, Dec 15, 2011 at 8:19 PM, Fajar A. Nugraha <list@xxxxxxxxx> wrote: > On Fri, Dec 16, 2011 at 1:49 AM, Tobias <tracer@xxxxxxxxxxx> wrote: >> Hi all! >> >> My BTRFS-FS ist getting really slow. Reading is ok, writing is slow and >> deleting is horrible slow. >> >> There are many files and many links on the FS. >> >> # btrfs filesystem df /srv/storage >> Data: total=3.09TB, used=3.07TB > > this is ... what, over 99% full? > The slow down is normal, somewhat. Same thing happens on zfs, which > became slower when usage is above 80-90%. I don't think "total" actually means "total space available" it increases as you use up more space. > >> Maybe it's because there is so much Metadata and it needs so many seeks on >> the discs when deleting? > > I doubt it. > >> I'd like to delete some of the old Files but its so horrible slow that i >> think its maybe faster to copy all needed Data to a different Disc, killing >> the FS and move the Files back... >> >> The machine is a QuadCore with 8GB RAM. Kernel is "3.1+for-linus". >> >> Any hints how i could speed it up? > > Try: > - mounting it with nodatacow: > https://btrfs.wiki.kernel.org/articles/f/a/q/FAQ_1fe9.html#Can_copy-on-write_be_turned_off_for_data_blocks.3F > - clobbering a big file: > https://btrfs.wiki.kernel.org/articles/f/a/q/FAQ_1fe9.html#if_your_device_is_large_.28.3E16gb.29 > > ... until you have at least 20% free space available. > > -- > Fajar > -- > 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 -- 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
