view mod_storage_appendmap/README.markdown @ 2496:e6a3bdbce7b9

mod_pep_vcard_png_avatar: Move to dwebp, handle errors on opening file_png.
author Michel Le Bihan <michel@lebihan.pl>
date Mon, 13 Feb 2017 21:50:53 +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