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mod_presence_dedup/README.markdown @ 5173:460f78654864

mod_muc_rtbl: also filter messages This was a bit tricky because we don't want to run the JIDs through SHA256 on each message. Took a while to come up with this simple plan of just caching the SHA256 of the JIDs on the occupants. This will leave some dirt in the occupants after unloading the module, but that should be ok; once they cycle the room, the hashes will be gone. This is direly needed, otherwise, there is a tight race between the moderation activities and the actors joining the room.
author Jonas Schäfer <jonas@wielicki.name>
date Tue, 21 Feb 2023 21:37:27 +0100
parent 2876:ea6b5321db50
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1 ---
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2 summary: Presence deduplication module
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3 labels:
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4 - 'Stage-Alpha'
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5 ...
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7 This module tries to squash incoming identical presence stanzas to save
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8 some bandwidth at the cost of increased memory use.
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10 Configuration
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11 =============
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12
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13 Option Type Default
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14 ------------------------------ -------- ---------
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15 presence\_dedup\_cache\_size number `100`
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17 The only setting controls how many presence stanzas *per session* are
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18 kept in memory for comparing with incoming presenece.
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19
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20 Requires Prosody 0.10 or later.