From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xavier Nicollet Subject: some issues with lots of snapshots Date: Tue, 26 Oct 2010 12:28:53 +0200 Message-ID: <20101026102853.GX13205@jeru.org> Reply-To: nicollet@jeru.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 To: linux-btrfs@vger.kernel.org Return-path: List-ID: I can't reproduce this right know, but it seems that creating lots of snapshots, one per minute (keeping only a dozens of them) may block the system. Every btrfs snap processes stay idle and the load skyrockets to 900. I use an old version: 2.6.34.5 kernel, and the system is still very responsive (web and mysql server). I would apreciate if somebody could tell me about the current kernel (I had stability issues with 2.6.35 series). # btrfs filesys show Label: 'btrfs' uuid: e13357f4-c40c-4940-87bd-4f5142d32c49 Total devices 2 FS bytes used 8.67GB devid 1 size 1.81TB used 12.03GB path /dev/sda2 devid 2 size 1.81TB used 12.01GB path /dev/sdb2 # btrfs filesys df /var Data, RAID1: total=11.00GB, used=8.24GB Metadata, RAID1: total=1.00GB, used=436.21MB System, RAID1: total=8.00MB, used=4.00KB Data: total=8.00MB, used=0.00 Metadata: total=8.00MB, used=0.00 System: total=4.00MB, used=0.00 Regards, PS: extract from dmesg if somebody is interested. http://pastebin.com/8zE4GKXu -- Xavier Nicollet