RE: What's peer manager default GC policy when buffer is full?

Sigurd — Thu, 12 Aug 2021 13:18:58 GMT

Hi,

Documentation for the Peer Manager can be found here: https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/lib_peer_manager.html

Garbage collection reclaims the flash space that is occupied by records that have been deleted, or that failed to be completely written due to, for example, a power loss.

Usually, you will call pm_handler_flash_clean() in pm_evt_handler(), https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_nrf5_v17.0.2%2Flib_pm_usage.html&cp=8_1_3_2_7_2_2&anchor=lib_pm_usage_events

and pm_handler_flash_clean() will do the following:

Ranks peers by when they last connected.
Garbage collects the flash when needed.
Deletes the lowest ranked peer(s) when garbage collection is insufficient.

[quote user=""]And Is there any detail document which explains garbage collection?[/quote]

Yes, here: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_nrf5_v17.0.2%2Flib_fds_functionality.html&cp=8_1_3_16_1_2&anchor=lib_fds_functionality_gc