From mboxrd@z Thu Jan 1 00:00:00 1970 From: Liu Bo Subject: Re: Extreme slowdown Date: Fri, 16 Dec 2011 10:09:48 +0800 Message-ID: <4EEAA86C.4080706@cn.fujitsu.com> References: <4EEA4124.20907@robotech.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Cc: Linux Btrfs To: Tobias Return-path: In-Reply-To: <4EEA4124.20907@robotech.de> List-ID: On 12/16/2011 02:49 AM, Tobias 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 > System, DUP: total=8.00MB, used=496.00KB > System: total=4.00MB, used=0.00 > Metadata, DUP: total=154.88GB, used=70.56GB > Metadata: total=8.00MB, used=0.00 > > Maybe it's because there is so much Metadata and it needs so many seeks > on the discs when deleting? > > 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? > I recommend to run defragment on your files, it should help you, although defrag maybe slow, too. thanks, liubo > Tobias > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >