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Storage went up 500GB randomly - Possibly due to Snapshots?
Here are the order of events. 1. Upgraded to 6.7.4. At this time, I had about 1TB free of 9TB. 2. Got an email that said "Less than 20% of volume joshnas's capacity is free. Performance on volum...
The defrag can increase snapshot space. For instance if you
- create a file
- make a snapshot
- rewrite part of it
the main file becomes fragmented, but the snapshot is the original unfragmented version. The blocks on the main file that weren't rewritten are shared with the snapshot.
When you defrag that main file, BTRFS can no longer share the blocks in common. So space usage goes up.
Your volume is very full. I suggest that you plan on expanding it. For now, try deleting the snapshots you have, and refrain from defrags until you have more free space.
Thanks for the info.
I went ahead and deleted all my snapshots:
(each different share is the same, no snapshots)
But I still have 500GB worth of snapshots:
Could they be hiding somewhere?
I definitely want to expand my storage, of course, but not in the position right now.
dbmann wrote:
Could they be hiding somewhere?
First wait a bit, since it can take a little while for the free space to re-appear.
But sometimes old snapshots do "hide". Do you have ssh enabled?
Another possibility is that the system needs to be balanced. Though it might not be a good idea to try that right now (since you have so little free space). Do you have any way to offload ~1 TB of data? If so, you could do that, then balance, then put the data back.
Ah, as I was typing this, I'm back up to 1.12TB free of 8.17TB.
If I were to balance, should I still take off 500GB or so, or can I do it now that I have more free space?
Thanks for your help so far.
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