mirror of
https://github.com/openhab/openhab-addons.git
synced 2025-01-10 15:11:59 +01:00
13 lines
681 B
Markdown
13 lines
681 B
Markdown
# MapDB Persistence
|
|
|
|
The [MapDB](https://mapdb.org/) persistence service is based on a simple key-value store that only saves the last value.
|
|
MapDB is useful for restoring items that have the `restoreOnStartup` strategy because other persistence options have some drawbacks if only the last value is needed on restarts.
|
|
|
|
Some disadvantages of other persistence services compared to MapDB are that they:
|
|
|
|
- grow in time
|
|
- require complex installs (`influxdb`, `jdbc`, `jpa`)
|
|
- `rrd4j` cannot store all item types (only numeric types)
|
|
|
|
It is only possible to query the last value and not other historic values because the MapDB persistence service can only store one value per item.
|