History

Wouter Born 8a7a411ccc Use Spotless sortpom plug-in (#18318 ) Similar to openhab/openhab-core#4618 Signed-off-by: Wouter Born <github@maindrain.net>		2025-02-23 20:23:16 +01:00
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src	Fix mapdb after core change (#18285 )	2025-02-18 22:16:04 +01:00
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README.md	[mapdb] Fix "a" typo and use "-" for bullets in docs (#13966 )	2022-12-16 11:22:48 +01:00
pom.xml	Use Spotless sortpom plug-in (#18318 )	2025-02-23 20:23:16 +01:00

README.md

MapDB Persistence

The MapDB 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.