view mod_storage_appendmap/README.markdown @ 3659:bb8a6df5ecba

mod_http_upload: Skip write if nothing expired when checking Reducing unnecessary IO is good.
author Kim Alvefur <zash@zash.se>
date Thu, 29 Aug 2019 23:35:42 +0200
parents 88474dd1af48
children
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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