view mod_storage_appendmap/README.markdown @ 5657:80abda15a1e9

mod_muc_members_json: Fix potential error when removing old affiliations Found this uncommitted change on a production server... The affiliation data may been `nil` at some point, triggering an error?
author Kim Alvefur <zash@zash.se>
date Tue, 19 Sep 2023 14:55:56 +0200
parents 88474dd1af48
children
line wrap: on
line source

---
labels:
- 'Stage-Alpha'
- 'Type-Storage'
summary: Experimental map store optimized for small incremental changes
...

This is an experimental storage driver where changed data is appended.
Data is simply written as `key = value` pairs to the end of the file.
This allows changes to individual keys to be written without needing to
write out the entire object again, but reads would grow gradually larger
as it still needs to read old overwritten keys. This may be suitable for
e.g. rosters where individual contacts are changed at a time. In theory,
this could also allow rolling back changes.

Requires 0.10