From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Helmut Hullen" Subject: Re: Btrfs balance Date: 20 Jan 2011 14:40:00 +0100 Message-ID: References: <4D38338B.3090903@gmail.com> Reply-To: helmut@hullen.de Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII To: linux-btrfs@vger.kernel.org Return-path: In-Reply-To: <4D38338B.3090903@gmail.com> List-ID: Hallo, Andreas, Du meintest am 20.01.11: > Maybe it is a very stupid question but I want to ask it anyway. In > general, 'btrfs filesystem balance' takes very long to finish and > produces lots of IO. So what are the classical usage scenarios, when > it is (really) worth doing a balance? Here (Kernel 2.6.37, btrfs git Nov. 2010): balancing two disks/ partitions with 2 and 1.5 TByte needs about 24 hours (CPU 1.5 GHz). What do you mean with "lots of IO"? the messages in "/var/log/messages" and "/var/log/warn"? Viele Gruesse! Helmut