Am Montag, den 24.07.2017, 09:46 -0400 schrieb Austin S. Hemmelgarn: > On 2017-07-24 07:27, Cloud Admin wrote: > > Hi, > > I have a multi-device pool (three discs) as RAID1. Now I want to > > add a > > new disc to increase the pool. I followed the description on https: > > //bt > > rfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices and > > used 'btrfs add <device> <btrfs path>'. After that I called a > > balance > > for rebalancing the RAID1 using 'btrfs balance start <btrfs path>'. > > Is that anything or should I need to call a resize (for example) or > > anything else? Or do I need to specify filter/profile parameters > > for > > balancing? > > I am a little bit confused because the balance command is running > > since > > 12 hours and only 3GB of data are touched. This would mean the > > whole > > balance process (new disc has 8TB) would run a long, long time... > > and > > is using one cpu by 100%. > > Based on what you're saying, it sounds like you've either run into a > bug, or have a huge number of snapshots on this filesystem.
It depends what you define as huge. The call of 'btrfs sub list <btrfs path>' returns a list of 255 subvolume. I think this is not too huge. The most of this subvolumes was created using docker itself. I cancel the balance (this will take awhile) and will try to delete such of these subvolumes/snapshots. What can I do more? > What you > described is exactly what you should be doing when expanding an > array > (add the device, then run a full balance). The fact that it's > taking > this long isn't normal, unless you have very slow storage devices. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
