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Michael Sproul 375e2b49b3 Conserve disk space by raising default SPRP (#3137) 
## Proposed Changes

Increase the default `--slots-per-restore-point` to 8192 for a 4x reduction in freezer DB disk usage.

Existing nodes that use the previous default of 2048 will be left unchanged. Newly synced nodes (with or without checkpoint sync) will use the new 8192 default. 

Long-term we could do away with the freezer DB entirely for validator-only nodes, but this change is much simpler and grants us some extra space in the short term. We can also roll it out gradually across our nodes by purging databases one by one, while keeping the Ansible config the same.

## Additional Info

We ignore a change from 2048 to 8192 if the user hasn't set the 8192 explicitly. We fire a debug log in the case where we do ignore:

```
DEBG Ignoring slots-per-restore-point config in favour of on-disk value, on_disk: 2048, config: 8192
```
2022-04-01 07:16:25 +00:00
..
src Conserve disk space by raising default SPRP (#3137) 2022-04-01 07:16:25 +00:00
.gitignore Add newly created mdbook 2019-09-01 11:31:18 +10:00
book.toml Update HTTP API docs (#1010) 2020-04-16 20:31:43 +10:00
README.md Update HTTP API docs (#1010) 2020-04-16 20:31:43 +10:00

README.md

Lighthouse Book

Contains an mdBook that serves as the primary source of Lighthouse user documentation.

The book is hosted at lighthouse-book.sigmaprime.io

Usage

The mdBook docs are the best source of information for building the book.

Example

  1. Install mdBook: $ cargo install mdbook
  2. Build the book, open it in a browser and build after file changes: $ mdbook serve --open