B1;2401;0cOn Tue, Nov 09, 2010 at 04:09:00PM +0100, Helmut Hullen wrote:
> btrfs device add /dev/sdc1 /srv/MM
> btrfs filesystem balance /srv/MM
>
> adds /dev/sdc1 with about 1,5 TByte ("df" tells so), and the system
> works the second line ("balance") since about 12 hours. How much time
> needs this "balance" command?Enough time to rewrite every piece of data in the filesystem. There are patches [1,2] for the kernel and userspace tools to allow you to monitor the progress of a balance. I'll be putting out a new revision of them either tonight or tomorrow (depending on how awkward git is feeling). [1] http://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg06558.html [2] http://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg06561.html > If the machine hangs somewhere and I have to restart it: how can/must I > repair the btrfs system? No need. Even while the balance is running, the filesystem should remain in a consistent state (assuming that you have working barriers). Note that if you restart the balance process, it will effectively start from the beginning again. Hugo. -- === Hugo Mills: h...@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Anyone using a computer to generate random numbers is, of --- course, in a state of sin.
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