how to use checkpoint in tsdb? what is the main function of checkpoint?

[lee3164]

question as above

[Brian Candler]

They're an implementation detail for crash recovery, not something you can use directly.

I can only find them described in documentation for very old versions of prometheus:

https://prometheus.io/docs/prometheus/1.8/storage/#crash-recovery

The database format changed completely in 2.x, but the code still includes WAL checkpoints.

If you want something you can access, look at snapshots:

https://prometheus.io/docs/prometheus/latest/querying/api/#snapshot