Mercurial > prosody-modules
view mod_presence_cache/README.markdown @ 2081:73096d8d924c
mod_track_muc_joins: Module to keep track of joined MUC rooms
author | Kim Alvefur <zash@zash.se> |
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date | Mon, 14 Mar 2016 13:36:12 +0100 |
parents | 65beed3ac500 |
children | 39d958f4a0c3 |
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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]. By default, only binary (online or offline) state is stored. It can optionally store the full presence but this requires much more memory and bandwidth. Configuration ============= Just enable the module. modules_enabled = { -- more modules "presence_cache"; } Advanced configuration ====================== To enable *experimental* full stanza caching: presence_cache_full = false This will usually double the presence data sent to clients, pending support for deduplication. 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.