On Sun, Oct 28, 2018 at 07:27:22AM +0800, Qu Wenruo wrote:
> > I can't drop all the snapshots since at least two is used for btrfs
> > send/receive backups.
> > However, if I delete more snapshots, and do a full balance, you think
> > it'll free up more space?
>
> No.
>
> You're already too worri
On 2018/10/28 上午1:42, Marc MERLIN wrote:
> On Wed, Oct 24, 2018 at 01:07:25PM +0800, Qu Wenruo wrote:
>>> saruman:/mnt/btrfs_pool1# btrfs balance start -musage=80 -v .
>>> Dumping filters: flags 0x6, state 0x0, force is off
>>> METADATA (flags 0x2): balancing, usage=80
>>> SYSTEM (flags 0x2):
On 2018-10-27 04:19 PM, Marc MERLIN wrote:
> Thanks for confirming. Because I always have snapshots for btrfs
> send/receive, defrag will duplicate as you say, but once the older
> snapshots get freed up, the duplicate blocks should go away, correct?
>
> Back to usage, thanks for pointing out tha
27.10.2018 21:12, Remi Gauvin пишет:
> On 2018-10-27 01:42 PM, Marc MERLIN wrote:
>
>>
>> I've been using btrfs for a long time now but I've never had a
>> filesystem where I had 15GB apparently unusable (7%) after a balance.
>>
>
> The space isn't unusable. It's just allocated.. (It's used in t
On Sat, Oct 27, 2018 at 02:12:02PM -0400, Remi Gauvin wrote:
> On 2018-10-27 01:42 PM, Marc MERLIN wrote:
>
> >
> > I've been using btrfs for a long time now but I've never had a
> > filesystem where I had 15GB apparently unusable (7%) after a balance.
> >
>
> The space isn't unusable. It's ju
On 2018-10-27 01:42 PM, Marc MERLIN wrote:
>
> I've been using btrfs for a long time now but I've never had a
> filesystem where I had 15GB apparently unusable (7%) after a balance.
>
The space isn't unusable. It's just allocated.. (It's used in the sense
that it's reserved for data chunks.).
On Wed, Oct 24, 2018 at 01:07:25PM +0800, Qu Wenruo wrote:
> > saruman:/mnt/btrfs_pool1# btrfs balance start -musage=80 -v .
> > Dumping filters: flags 0x6, state 0x0, force is off
> > METADATA (flags 0x2): balancing, usage=80
> > SYSTEM (flags 0x2): balancing, usage=80
> > Done, had to relocat
On 2018/10/24 上午8:36, Marc MERLIN wrote:
> Normally when btrfs fi show will show lost space because
> your trees aren't balanced.
Not always the case.
Btrfs uses two level allocation:
1) Chunk
2 types, data, metadata, and system.
And that's "used" space of "btrfs fi show", or "Device al
24.10.2018 3:36, Marc MERLIN пишет:
> Normally when btrfs fi show will show lost space because
> your trees aren't balanced.
> Balance usually reclaims that space, or most of it.
> In this case, not so much.
>
> kernel 4.17.6:
>
> saruman:/mnt/btrfs_pool1# btrfs fi show .
> Label: 'btrfs_pool1'
