view mod_storage_appendmap/README.markdown @ 3434:a6722a35f35e

mod_storage_xmlarchive: Expand description in README
author Kim Alvefur <zash@zash.se>
date Sun, 06 Jan 2019 10:27:16 +0100
parents 88474dd1af48
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---
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