view mod_storage_appendmap/README.markdown @ 4518:073f5397c1d2

mod_rest: Replace most mappings by using util.datamapper All the stuff now goes into a JSON file that describes the mappings.
author Kim Alvefur <zash@zash.se>
date Sun, 21 Mar 2021 23:54:06 +0100
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