diff options
Diffstat (limited to 'synapse/storage')
7 files changed, 100 insertions, 26 deletions
diff --git a/synapse/storage/databases/__init__.py b/synapse/storage/databases/__init__.py index 0ac854aee2..c73d54fb67 100644 --- a/synapse/storage/databases/__init__.py +++ b/synapse/storage/databases/__init__.py @@ -68,7 +68,7 @@ class Databases(object): # If we're on a process that can persist events also # instantiate a `PersistEventsStore` - if hs.config.worker.writers.events == hs.get_instance_name(): + if hs.get_instance_name() in hs.config.worker.writers.events: persist_events = PersistEventsStore(hs, database, main) if "state" in database_config.databases: diff --git a/synapse/storage/databases/main/event_federation.py b/synapse/storage/databases/main/event_federation.py index 0b69aa6a94..4c3c162acf 100644 --- a/synapse/storage/databases/main/event_federation.py +++ b/synapse/storage/databases/main/event_federation.py @@ -438,7 +438,7 @@ class EventFederationWorkerStore(EventsWorkerStore, SignatureWorkerStore, SQLBas """ if stream_ordering <= self.stream_ordering_month_ago: - raise StoreError(400, "stream_ordering too old") + raise StoreError(400, "stream_ordering too old %s" % (stream_ordering,)) sql = """ SELECT event_id FROM stream_ordering_to_exterm diff --git a/synapse/storage/databases/main/events.py b/synapse/storage/databases/main/events.py index 6313b41eef..46b11e705b 100644 --- a/synapse/storage/databases/main/events.py +++ b/synapse/storage/databases/main/events.py @@ -97,6 +97,7 @@ class PersistEventsStore: self.store = main_data_store self.database_engine = db.engine self._clock = hs.get_clock() + self._instance_name = hs.get_instance_name() self._ephemeral_messages_enabled = hs.config.enable_ephemeral_messages self.is_mine_id = hs.is_mine_id @@ -108,7 +109,7 @@ class PersistEventsStore: # This should only exist on instances that are configured to write assert ( - hs.config.worker.writers.events == hs.get_instance_name() + hs.get_instance_name() in hs.config.worker.writers.events ), "Can only instantiate EventsStore on master" async def _persist_events_and_state_updates( @@ -800,6 +801,7 @@ class PersistEventsStore: table="events", values=[ { + "instance_name": self._instance_name, "stream_ordering": event.internal_metadata.stream_ordering, "topological_ordering": event.depth, "depth": event.depth, diff --git a/synapse/storage/databases/main/events_worker.py b/synapse/storage/databases/main/events_worker.py index a7a73cc3d8..17f5997b89 100644 --- a/synapse/storage/databases/main/events_worker.py +++ b/synapse/storage/databases/main/events_worker.py @@ -42,7 +42,8 @@ from synapse.replication.tcp.streams import BackfillStream from synapse.replication.tcp.streams.events import EventsStream from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause from synapse.storage.database import DatabasePool -from synapse.storage.util.id_generators import StreamIdGenerator +from synapse.storage.engines import PostgresEngine +from synapse.storage.util.id_generators import MultiWriterIdGenerator, StreamIdGenerator from synapse.types import Collection, get_domain_from_id from synapse.util.caches.descriptors import Cache, cached from synapse.util.iterutils import batch_iter @@ -78,27 +79,54 @@ class EventsWorkerStore(SQLBaseStore): def __init__(self, database: DatabasePool, db_conn, hs): super(EventsWorkerStore, self).__init__(database, db_conn, hs) - if hs.config.worker.writers.events == hs.get_instance_name(): - # We are the process in charge of generating stream ids for events, - # so instantiate ID generators based on the database - self._stream_id_gen = StreamIdGenerator( - db_conn, "events", "stream_ordering", + if isinstance(database.engine, PostgresEngine): + # If we're using Postgres than we can use `MultiWriterIdGenerator` + # regardless of whether this process writes to the streams or not. + self._stream_id_gen = MultiWriterIdGenerator( + db_conn=db_conn, + db=database, + instance_name=hs.get_instance_name(), + table="events", + instance_column="instance_name", + id_column="stream_ordering", + sequence_name="events_stream_seq", ) - self._backfill_id_gen = StreamIdGenerator( - db_conn, - "events", - "stream_ordering", - step=-1, - extra_tables=[("ex_outlier_stream", "event_stream_ordering")], + self._backfill_id_gen = MultiWriterIdGenerator( + db_conn=db_conn, + db=database, + instance_name=hs.get_instance_name(), + table="events", + instance_column="instance_name", + id_column="stream_ordering", + sequence_name="events_backfill_stream_seq", + positive=False, ) else: - # Another process is in charge of persisting events and generating - # stream IDs: rely on the replication streams to let us know which - # IDs we can process. - self._stream_id_gen = SlavedIdTracker(db_conn, "events", "stream_ordering") - self._backfill_id_gen = SlavedIdTracker( - db_conn, "events", "stream_ordering", step=-1 - ) + # We shouldn't be running in worker mode with SQLite, but its useful + # to support it for unit tests. + # + # If this process is the writer than we need to use + # `StreamIdGenerator`, otherwise we use `SlavedIdTracker` which gets + # updated over replication. (Multiple writers are not supported for + # SQLite). + if hs.get_instance_name() in hs.config.worker.writers.events: + self._stream_id_gen = StreamIdGenerator( + db_conn, "events", "stream_ordering", + ) + self._backfill_id_gen = StreamIdGenerator( + db_conn, + "events", + "stream_ordering", + step=-1, + extra_tables=[("ex_outlier_stream", "event_stream_ordering")], + ) + else: + self._stream_id_gen = SlavedIdTracker( + db_conn, "events", "stream_ordering" + ) + self._backfill_id_gen = SlavedIdTracker( + db_conn, "events", "stream_ordering", step=-1 + ) self._get_event_cache = Cache( "*getEvent*", diff --git a/synapse/storage/databases/main/schema/delta/58/14events_instance_name.sql b/synapse/storage/databases/main/schema/delta/58/14events_instance_name.sql new file mode 100644 index 0000000000..98ff76d709 --- /dev/null +++ b/synapse/storage/databases/main/schema/delta/58/14events_instance_name.sql @@ -0,0 +1,16 @@ +/* Copyright 2020 The Matrix.org Foundation C.I.C. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +ALTER TABLE events ADD COLUMN instance_name TEXT; diff --git a/synapse/storage/databases/main/schema/delta/58/14events_instance_name.sql.postgres b/synapse/storage/databases/main/schema/delta/58/14events_instance_name.sql.postgres new file mode 100644 index 0000000000..97c1e6a0c5 --- /dev/null +++ b/synapse/storage/databases/main/schema/delta/58/14events_instance_name.sql.postgres @@ -0,0 +1,26 @@ +/* Copyright 2020 The Matrix.org Foundation C.I.C. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +CREATE SEQUENCE IF NOT EXISTS events_stream_seq; + +SELECT setval('events_stream_seq', ( + SELECT COALESCE(MAX(stream_ordering), 1) FROM events +)); + +CREATE SEQUENCE IF NOT EXISTS events_backfill_stream_seq; + +SELECT setval('events_backfill_stream_seq', ( + SELECT COALESCE(-MIN(stream_ordering), 1) FROM events +)); diff --git a/synapse/storage/util/id_generators.py b/synapse/storage/util/id_generators.py index 9f3d23f0a5..8fd21c2bf8 100644 --- a/synapse/storage/util/id_generators.py +++ b/synapse/storage/util/id_generators.py @@ -231,8 +231,12 @@ class MultiWriterIdGenerator: # gaps should be relatively rare it's still worth doing the book keeping # that allows us to skip forwards when there are gapless runs of # positions. + # + # We start at 1 here as a) the first generated stream ID will be 2, and + # b) other parts of the code assume that stream IDs are strictly greater + # than 0. self._persisted_upto_position = ( - min(self._current_positions.values()) if self._current_positions else 0 + min(self._current_positions.values()) if self._current_positions else 1 ) self._known_persisted_positions = [] # type: List[int] @@ -362,9 +366,7 @@ class MultiWriterIdGenerator: equal to it have been successfully persisted. """ - # Currently we don't support this operation, as it's not obvious how to - # condense the stream positions of multiple writers into a single int. - raise NotImplementedError() + return self.get_persisted_upto_position() def get_current_token_for_writer(self, instance_name: str) -> int: """Returns the position of the given writer. |