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mod_presence_cache/README.markdown @ 2146:39d958f4a0c3
mod_presence_cache: Remove caching of full presence
author | Kim Alvefur <zash@zash.se> |
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date | Fri, 01 Apr 2016 15:15:56 +0200 |
parent | 1959:65beed3ac500 |
child | 2147:ed2bb50d4f91 |
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--- summary: Cache presence incoming presence ... Introduction ============ This module stores presence from users contact even when they are offline, so that the client can see who is online faster when they sign in, and won't have to wait for remote servers to reply. Note that in its current form, the number of presence stanzas sent to a client is doubled, as the client would get both the cached stanzas and replies to presence probes. Also see [mod\_throttle\_presence]. Configuration ============= Just enable the module. modules_enabled = { -- more modules "presence_cache"; } Advanced configuration ====================== TODO ==== - Deduplication, i.e don's send stanzas that are identical to the last seen. - Cache invalidation or expiry, eg if a remote server goes down or is gone a long time. - Sending probes at some interval to keep the cache reasonably fresh.