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Sliding Sync: Use Sliding Sync tables for sorting (#17693)

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Use Sliding Sync tables for sorting
(`bulk_get_last_event_pos_in_room_before_stream_ordering(...)` ->
`_bulk_get_max_event_pos(...)`)
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Eric Eastwood 2024-09-11 12:16:24 -05:00 committed by GitHub
parent e4a1f271b9
commit 16af80b8fb
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8 changed files with 103 additions and 105 deletions
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1
changelog.d/17693.misc Normal file
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@ -0,0 +1 @@
Use Sliding Sync tables as a bulk shortcut for getting the max `event_stream_ordering` of rooms.

71
synapse/handlers/sliding_sync/room_lists.py
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@ -27,6 +27,7 @@ from typing import (
Set,
Tuple,
Union,
cast,
)
import attr
@ -355,11 +356,18 @@ class SlidingSyncRoomLists:
if list_config.ranges:
if list_config.ranges == [(0, len(filtered_sync_room_map) - 1)]:
# If we are asking for the full range, we don't need to sort the list.
sorted_room_info = list(filtered_sync_room_map.values())
sorted_room_info: List[RoomsForUserType] = list(
filtered_sync_room_map.values()
)
else:
# Sort the list
sorted_room_info = await self.sort_rooms_using_tables(
filtered_sync_room_map, to_token
sorted_room_info = await self.sort_rooms(
# Cast is safe because RoomsForUserSlidingSync is part
# of the `RoomsForUserType` union. Why can't it detect this?
cast(
Dict[str, RoomsForUserType], filtered_sync_room_map
),
to_token,
)
for range in list_config.ranges:
@ -1762,63 +1770,6 @@ class SlidingSyncRoomLists:
# Assemble a new sync room map but only with the `filtered_room_id_set`
return {room_id: sync_room_map[room_id] for room_id in filtered_room_id_set}
@trace
async def sort_rooms_using_tables(
self,
sync_room_map: Mapping[str, RoomsForUserSlidingSync],
to_token: StreamToken,
) -> List[RoomsForUserSlidingSync]:
"""
Sort by `stream_ordering` of the last event that the user should see in the
room. `stream_ordering` is unique so we get a stable sort.
Args:
sync_room_map: Dictionary of room IDs to sort along with membership
information in the room at the time of `to_token`.
to_token: We sort based on the events in the room at this token (<= `to_token`)
Returns:
A sorted list of room IDs by `stream_ordering` along with membership information.
"""
# Assemble a map of room ID to the `stream_ordering` of the last activity that the
# user should see in the room (<= `to_token`)
last_activity_in_room_map: Dict[str, int] = {}
for room_id, room_for_user in sync_room_map.items():
if room_for_user.membership != Membership.JOIN:
# If the user has left/been invited/knocked/been banned from a
# room, they shouldn't see anything past that point.
#
# FIXME: It's possible that people should see beyond this point
# in invited/knocked cases if for example the room has
# `invite`/`world_readable` history visibility, see
# https://github.com/matrix-org/matrix-spec-proposals/pull/3575#discussion_r1653045932
last_activity_in_room_map[room_id] = room_for_user.event_pos.stream
# For fully-joined rooms, we find the latest activity at/before the
# `to_token`.
joined_room_positions = (
await self.store.bulk_get_last_event_pos_in_room_before_stream_ordering(
[
room_id
for room_id, room_for_user in sync_room_map.items()
if room_for_user.membership == Membership.JOIN
],
to_token.room_key,
)
)
last_activity_in_room_map.update(joined_room_positions)
return sorted(
sync_room_map.values(),
# Sort by the last activity (stream_ordering) in the room
key=lambda room_info: last_activity_in_room_map[room_info.room_id],
# We want descending order
reverse=True,
)
@trace
async def sort_rooms(
self,

29
synapse/storage/databases/main/events_bg_updates.py
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@ -52,6 +52,7 @@ from synapse.storage.types import Cursor
from synapse.types import JsonDict, RoomStreamToken, StateMap, StrCollection
from synapse.types.handlers import SLIDING_SYNC_DEFAULT_BUMP_EVENT_TYPES
from synapse.types.state import StateFilter
from synapse.types.storage import _BackgroundUpdates
from synapse.util import json_encoder
from synapse.util.iterutils import batch_iter
@ -76,34 +77,6 @@ _REPLACE_STREAM_ORDERING_SQL_COMMANDS = (
)
class _BackgroundUpdates:
EVENT_ORIGIN_SERVER_TS_NAME = "event_origin_server_ts"
EVENT_FIELDS_SENDER_URL_UPDATE_NAME = "event_fields_sender_url"
DELETE_SOFT_FAILED_EXTREMITIES = "delete_soft_failed_extremities"
POPULATE_STREAM_ORDERING2 = "populate_stream_ordering2"
INDEX_STREAM_ORDERING2 = "index_stream_ordering2"
INDEX_STREAM_ORDERING2_CONTAINS_URL = "index_stream_ordering2_contains_url"
INDEX_STREAM_ORDERING2_ROOM_ORDER = "index_stream_ordering2_room_order"
INDEX_STREAM_ORDERING2_ROOM_STREAM = "index_stream_ordering2_room_stream"
INDEX_STREAM_ORDERING2_TS = "index_stream_ordering2_ts"
REPLACE_STREAM_ORDERING_COLUMN = "replace_stream_ordering_column"
EVENT_EDGES_DROP_INVALID_ROWS = "event_edges_drop_invalid_rows"
EVENT_EDGES_REPLACE_INDEX = "event_edges_replace_index"
EVENTS_POPULATE_STATE_KEY_REJECTIONS = "events_populate_state_key_rejections"
EVENTS_JUMP_TO_DATE_INDEX = "events_jump_to_date_index"
SLIDING_SYNC_PREFILL_JOINED_ROOMS_TO_RECALCULATE_TABLE_BG_UPDATE = (
"sliding_sync_prefill_joined_rooms_to_recalculate_table_bg_update"
)
SLIDING_SYNC_JOINED_ROOMS_BG_UPDATE = "sliding_sync_joined_rooms_bg_update"
SLIDING_SYNC_MEMBERSHIP_SNAPSHOTS_BG_UPDATE = (
"sliding_sync_membership_snapshots_bg_update"
)
@attr.s(slots=True, frozen=True, auto_attribs=True)
class _CalculateChainCover:
"""Return value for _calculate_chain_cover_txn."""

12
synapse/storage/databases/main/events_worker.py
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@ -83,6 +83,7 @@ from synapse.storage.util.id_generators import (
from synapse.storage.util.sequence import build_sequence_generator
from synapse.types import JsonDict, get_domain_from_id
from synapse.types.state import StateFilter
from synapse.types.storage import _BackgroundUpdates
from synapse.util import unwrapFirstError
from synapse.util.async_helpers import ObservableDeferred, delay_cancellation
from synapse.util.caches.descriptors import cached, cachedList
@ -2465,3 +2466,14 @@ class EventsWorkerStore(SQLBaseStore):
)
self.invalidate_get_event_cache_after_txn(txn, event_id)
async def have_finished_sliding_sync_background_jobs(self) -> bool:
"""Return if it's safe to use the sliding sync membership tables."""
return await self.db_pool.updates.have_completed_background_updates(
(
_BackgroundUpdates.SLIDING_SYNC_PREFILL_JOINED_ROOMS_TO_RECALCULATE_TABLE_BG_UPDATE,
_BackgroundUpdates.SLIDING_SYNC_JOINED_ROOMS_BG_UPDATE,
_BackgroundUpdates.SLIDING_SYNC_MEMBERSHIP_SNAPSHOTS_BG_UPDATE,
)
)

12
synapse/storage/databases/main/roommember.py
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@ -51,7 +51,6 @@ from synapse.storage.database import (
LoggingTransaction,
)
from synapse.storage.databases.main.cache import CacheInvalidationWorkerStore
from synapse.storage.databases.main.events_bg_updates import _BackgroundUpdates
from synapse.storage.databases.main.events_worker import EventsWorkerStore
from synapse.storage.engines import Sqlite3Engine
from synapse.storage.roommember import (
@ -1449,17 +1448,6 @@ class RoomMemberWorkerStore(EventsWorkerStore, CacheInvalidationWorkerStore):
get_sliding_sync_rooms_for_user_txn,
)
async def have_finished_sliding_sync_background_jobs(self) -> bool:
"""Return if it's safe to use the sliding sync membership tables."""
return await self.db_pool.updates.have_completed_background_updates(
(
_BackgroundUpdates.SLIDING_SYNC_PREFILL_JOINED_ROOMS_TO_RECALCULATE_TABLE_BG_UPDATE,
_BackgroundUpdates.SLIDING_SYNC_JOINED_ROOMS_BG_UPDATE,
_BackgroundUpdates.SLIDING_SYNC_MEMBERSHIP_SNAPSHOTS_BG_UPDATE,
)
)
class RoomMemberBackgroundUpdateStore(SQLBaseStore):
def __init__(

30
synapse/storage/databases/main/stream.py
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@ -1524,7 +1524,7 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
# majority of rooms will have a latest token from before the min stream
# pos.
def bulk_get_max_event_pos_txn(
def bulk_get_max_event_pos_fallback_txn(
txn: LoggingTransaction, batched_room_ids: StrCollection
) -> Dict[str, int]:
clause, args = make_in_list_sql_clause(
@ -1547,10 +1547,36 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
txn.execute(sql, [max_pos] + args)
return {row[0]: row[1] for row in txn}
# It's easier to look at the `sliding_sync_joined_rooms` table and avoid all of
# the joins and sub-queries.
def bulk_get_max_event_pos_from_sliding_sync_tables_txn(
txn: LoggingTransaction, batched_room_ids: StrCollection
) -> Dict[str, int]:
clause, args = make_in_list_sql_clause(
self.database_engine, "room_id", batched_room_ids
)
sql = f"""
SELECT room_id, event_stream_ordering
FROM sliding_sync_joined_rooms
WHERE {clause}
ORDER BY event_stream_ordering DESC
"""
txn.execute(sql, args)
return {row[0]: row[1] for row in txn}
recheck_rooms: Set[str] = set()
for batched in batch_iter(room_ids, 1000):
if await self.have_finished_sliding_sync_background_jobs():
batch_results = await self.db_pool.runInteraction(
"_bulk_get_max_event_pos", bulk_get_max_event_pos_txn, batched
"bulk_get_max_event_pos_from_sliding_sync_tables_txn",
bulk_get_max_event_pos_from_sliding_sync_tables_txn,
batched,
)
else:
batch_results = await self.db_pool.runInteraction(
"bulk_get_max_event_pos_fallback_txn",
bulk_get_max_event_pos_fallback_txn,
batched,
)
for room_id, stream_ordering in batch_results.items():
if stream_ordering <= now_token.stream:

47
synapse/types/storage/__init__.py Normal file
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@ -0,0 +1,47 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright (C) 2024 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#
class _BackgroundUpdates:
EVENT_ORIGIN_SERVER_TS_NAME = "event_origin_server_ts"
EVENT_FIELDS_SENDER_URL_UPDATE_NAME = "event_fields_sender_url"
DELETE_SOFT_FAILED_EXTREMITIES = "delete_soft_failed_extremities"
POPULATE_STREAM_ORDERING2 = "populate_stream_ordering2"
INDEX_STREAM_ORDERING2 = "index_stream_ordering2"
INDEX_STREAM_ORDERING2_CONTAINS_URL = "index_stream_ordering2_contains_url"
INDEX_STREAM_ORDERING2_ROOM_ORDER = "index_stream_ordering2_room_order"
INDEX_STREAM_ORDERING2_ROOM_STREAM = "index_stream_ordering2_room_stream"
INDEX_STREAM_ORDERING2_TS = "index_stream_ordering2_ts"
REPLACE_STREAM_ORDERING_COLUMN = "replace_stream_ordering_column"
EVENT_EDGES_DROP_INVALID_ROWS = "event_edges_drop_invalid_rows"
EVENT_EDGES_REPLACE_INDEX = "event_edges_replace_index"
EVENTS_POPULATE_STATE_KEY_REJECTIONS = "events_populate_state_key_rejections"
EVENTS_JUMP_TO_DATE_INDEX = "events_jump_to_date_index"
SLIDING_SYNC_PREFILL_JOINED_ROOMS_TO_RECALCULATE_TABLE_BG_UPDATE = (
"sliding_sync_prefill_joined_rooms_to_recalculate_table_bg_update"
)
SLIDING_SYNC_JOINED_ROOMS_BG_UPDATE = "sliding_sync_joined_rooms_bg_update"
SLIDING_SYNC_MEMBERSHIP_SNAPSHOTS_BG_UPDATE = (
"sliding_sync_membership_snapshots_bg_update"
)

2
tests/storage/test_sliding_sync_tables.py
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@ -34,11 +34,11 @@ from synapse.rest.client import login, room
from synapse.server import HomeServer
from synapse.storage.databases.main.events import DeltaState
from synapse.storage.databases.main.events_bg_updates import (
_BackgroundUpdates,
_resolve_stale_data_in_sliding_sync_joined_rooms_table,
_resolve_stale_data_in_sliding_sync_membership_snapshots_table,
)
from synapse.types import create_requester
from synapse.types.storage import _BackgroundUpdates
from synapse.util import Clock
from tests.test_utils.event_injection import create_event