view mod_storage_appendmap/README.markdown @ 2724:9f17d0f28d77

mod_mam: Don't ask the storage backend to count all items when expiry is disabled
author Kim Alvefur <zash@zash.se>
date Wed, 26 Apr 2017 11:46:22 +0200
parents b84284144e21
children 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
eg rosters where individual contacts are changed at a time. In theory,
this could also allow rolling back changes.

Requires 0.10