Free Space Management

Carlos Gomes

Active Member
Jan 23, 2017
15
4
43
41
Chur, Switzerland
Hello Everyone

I went first on some other threads here on the forums with similar questions, that when removing older snapshots the free space available won't change. Most of the answers were that if some chunks are used or shared with older infos they won't be free, only if the garbage collection is used after those deletions.

So I went on this path:
- reconfigured the prune & GC to lower retentions
- went to content / prune all, selected only "keep last 3" to ditch all other backups above this range
- removed some snapshots manually on the vms to stay with only the 1 copy / count
- went back tp prune & gc, started the garbage collection manually

even after those steps, I have the same free space available on the datastore. The "estimate full" field is showing "never", but it used to have a prediction of about 80 days after we setup all backups to be made on this PBS instance.

Question is:
- The estimate full being "never" is already counting that data will not grow with newer snapshots?
- How to see / free space after snapshot removal, garbage collection and prune was made on the datastore?
- witch of the real steps to free space on the datastore?

for reference an output of the manual garbage collection:
Code:
2022-01-19T18:23:08+01:00: Removed garbage: 0 B
2022-01-19T18:23:08+01:00: Removed chunks: 0
2022-01-19T18:23:08+01:00: Pending removals: 346.32 GiB (in 170675 chunks)
2022-01-19T18:23:08+01:00: Original data usage: 9.662 TiB
2022-01-19T18:23:08+01:00: On-Disk usage: 2.7 TiB (27.94%)
2022-01-19T18:23:08+01:00: On-Disk chunks: 1074331
2022-01-19T18:23:08+01:00: Deduplication factor: 3.58
2022-01-19T18:23:08+01:00: Average chunk size: 2.635 MiB
2022-01-19T18:23:08+01:00: TASK OK

1642613144505.png
 
Last edited:

About

The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!