From mboxrd@z Thu Jan 1 00:00:00 1970 From: "krzf83@gmail.com " Subject: btrfs and load (sys) Date: Wed, 23 Nov 2011 15:43:14 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 To: linux-btrfs@vger.kernel.org Return-path: List-ID: I've been using btrfs for two months now. Every day between 02:00 and 08:00 I rsync some 300GB data (milions of files) to btrfs device and then make snapshot. Next day i rsync again 300GG little changed (rsync "in place"). First days it worked perfectly. Then loadavg (sys load) started to rise. Now, after 60 days of rsync+shapshots sys load is so high that whole server becames quite unresponsive betweend 02:00 and 08:00. I never deleted any shapshot (yet) to its not rebalancing thing. What all those btrfs benchmark does not tell you that its performance decreases (sys load increases) with growing size of btree. Creating btrfs filesystem is instantaneous because initial tree is just nothing... I tried using btrfs and nilfs2 for a half year now and I would never trust a byte of production data to it.