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Precompute joined hosts and store in Redis (#9198)

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Erik Johnston 2021-01-26 13:57:31 +00:00 • committed by GitHub
parent 4937fe3d6b
commit dd8da8c5f6
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11 changed files with 265 additions and 49 deletions
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50
synapse/federation/sender/__init__.py
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@ -142,6 +142,8 @@ class FederationSender:
self._wake_destinations_needing_catchup,
)
self._external_cache = hs.get_external_cache()
def _get_per_destination_queue(self, destination: str) -> PerDestinationQueue:
"""Get or create a PerDestinationQueue for the given destination
@ -197,22 +199,40 @@ class FederationSender:
if not event.internal_metadata.should_proactively_send():
return
try:
# Get the state from before the event.
# We need to make sure that this is the state from before
# the event and not from after it.
# Otherwise if the last member on a server in a room is
# banned then it won't receive the event because it won't
# be in the room after the ban.
destinations = await self.state.get_hosts_in_room_at_events(
event.room_id, event_ids=event.prev_event_ids()
destinations = None # type: Optional[Set[str]]
if not event.prev_event_ids():
# If there are no prev event IDs then the state is empty
# and so no remote servers in the room
destinations = set()
else:
# We check the external cache for the destinations, which is
# stored per state group.
sg = await self._external_cache.get(
"event_to_prev_state_group", event.event_id
)
except Exception:
logger.exception(
"Failed to calculate hosts in room for event: %s",
event.event_id,
)
return
if sg:
destinations = await self._external_cache.get(
"get_joined_hosts", str(sg)
)
if destinations is None:
try:
# Get the state from before the event.
# We need to make sure that this is the state from before
# the event and not from after it.
# Otherwise if the last member on a server in a room is
# banned then it won't receive the event because it won't
# be in the room after the ban.
destinations = await self.state.get_hosts_in_room_at_events(
event.room_id, event_ids=event.prev_event_ids()
)
except Exception:
logger.exception(
"Failed to calculate hosts in room for event: %s",
event.event_id,
)
return
destinations = {
d