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Revert "Add experimental support for sharding event persister. (#8170)" (#8242)

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* Revert "Add experimental support for sharding event persister. (#8170)"

This reverts commit 82c1ee1c22.

* Changelog
This commit is contained in:
Brendan Abolivier 2020-09-04 10:19:42 +01:00 • committed by GitHub
parent be16ee59a8
commit 9f8abdcc38
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19 changed files with 78 additions and 206 deletions
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66
synapse/storage/databases/main/events_worker.py
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@ -42,8 +42,7 @@ 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.engines import PostgresEngine
from synapse.storage.util.id_generators import MultiWriterIdGenerator, StreamIdGenerator
from synapse.storage.util.id_generators import 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
@ -79,54 +78,27 @@ class EventsWorkerStore(SQLBaseStore):
def __init__(self, database: DatabasePool, db_conn, hs):
super(EventsWorkerStore, self).__init__(database, db_conn, hs)
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",
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",
)
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,
self._backfill_id_gen = StreamIdGenerator(
db_conn,
"events",
"stream_ordering",
step=-1,
extra_tables=[("ex_outlier_stream", "event_stream_ordering")],
)
else:
# 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
)
# 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
)
self._get_event_cache = Cache(
"*getEvent*",