view mod_storage_appendmap/README.markdown @ 2474:173fe999cc37

mod_http_upload: Use the correct variable name for directory
author Kim Alvefur <zash@zash.se>
date Sun, 29 Jan 2017 18:10:06 +0100
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