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Move cache invalidation to main data store

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This commit is contained in:
Erik Johnston 2019-12-03 14:28:46 +00:00
parent 6b2867096b
commit 1056d6885a
6 changed files with 143 additions and 113 deletions
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3
synapse/replication/slave/storage/_base.py
View File

@ -18,7 +18,8 @@ from typing import Dict
import six
from synapse.storage._base import _CURRENT_STATE_CACHE_NAME, SQLBaseStore
from synapse.storage._base import SQLBaseStore
from synapse.storage.data_stores.main.cache import _CURRENT_STATE_CACHE_NAME
from synapse.storage.engines import PostgresEngine
from ._slaved_id_tracker import SlavedIdTracker

104
synapse/storage/_base.py
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@ -14,7 +14,6 @@
# 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.
import itertools
import logging
import random
import sys
@ -34,7 +33,6 @@ from synapse.logging.context import LoggingContext, make_deferred_yieldable
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage.engines import PostgresEngine, Sqlite3Engine
from synapse.types import get_domain_from_id
from synapse.util import batch_iter
from synapse.util.stringutils import exception_to_unicode
# import a function which will return a monotonic time, in seconds
@ -77,10 +75,6 @@ UNIQUE_INDEX_BACKGROUND_UPDATES = {
"event_search": "event_search_event_id_idx",
}
# This is a special cache name we use to batch multiple invalidations of caches
# based on the current state when notifying workers over replication.
_CURRENT_STATE_CACHE_NAME = "cs_cache_fake"
class LoggingTransaction(object):
"""An object that almost-transparently proxies for the 'txn' object
@ -1322,47 +1316,6 @@ class SQLBaseStore(object):
return cache, min_val
def _invalidate_cache_and_stream(self, txn, cache_func, keys):
"""Invalidates the cache and adds it to the cache stream so slaves
will know to invalidate their caches.
This should only be used to invalidate caches where slaves won't
otherwise know from other replication streams that the cache should
be invalidated.
"""
txn.call_after(cache_func.invalidate, keys)
self._send_invalidation_to_replication(txn, cache_func.__name__, keys)
def _invalidate_state_caches_and_stream(self, txn, room_id, members_changed):
"""Special case invalidation of caches based on current state.
We special case this so that we can batch the cache invalidations into a
single replication poke.
Args:
txn
room_id (str): Room where state changed
members_changed (iterable[str]): The user_ids of members that have changed
"""
txn.call_after(self._invalidate_state_caches, room_id, members_changed)
if members_changed:
# We need to be careful that the size of the `members_changed` list
# isn't so large that it causes problems sending over replication, so we
# send them in chunks.
# Max line length is 16K, and max user ID length is 255, so 50 should
# be safe.
for chunk in batch_iter(members_changed, 50):
keys = itertools.chain([room_id], chunk)
self._send_invalidation_to_replication(
txn, _CURRENT_STATE_CACHE_NAME, keys
)
else:
# if no members changed, we still need to invalidate the other caches.
self._send_invalidation_to_replication(
txn, _CURRENT_STATE_CACHE_NAME, [room_id]
)
def _invalidate_state_caches(self, room_id, members_changed):
"""Invalidates caches that are based on the current state, but does
not stream invalidations down replication.
@ -1396,63 +1349,6 @@ class SQLBaseStore(object):
# which is fine.
pass
def _send_invalidation_to_replication(self, txn, cache_name, keys):
"""Notifies replication that given cache has been invalidated.
Note that this does *not* invalidate the cache locally.
Args:
txn
cache_name (str)
keys (iterable[str])
"""
if isinstance(self.database_engine, PostgresEngine):
# get_next() returns a context manager which is designed to wrap
# the transaction. However, we want to only get an ID when we want
# to use it, here, so we need to call __enter__ manually, and have
# __exit__ called after the transaction finishes.
ctx = self._cache_id_gen.get_next()
stream_id = ctx.__enter__()
txn.call_on_exception(ctx.__exit__, None, None, None)
txn.call_after(ctx.__exit__, None, None, None)
txn.call_after(self.hs.get_notifier().on_new_replication_data)
self._simple_insert_txn(
txn,
table="cache_invalidation_stream",
values={
"stream_id": stream_id,
"cache_func": cache_name,
"keys": list(keys),
"invalidation_ts": self.clock.time_msec(),
},
)
def get_all_updated_caches(self, last_id, current_id, limit):
if last_id == current_id:
return defer.succeed([])
def get_all_updated_caches_txn(txn):
# We purposefully don't bound by the current token, as we want to
# send across cache invalidations as quickly as possible. Cache
# invalidations are idempotent, so duplicates are fine.
sql = (
"SELECT stream_id, cache_func, keys, invalidation_ts"
" FROM cache_invalidation_stream"
" WHERE stream_id > ? ORDER BY stream_id ASC LIMIT ?"
)
txn.execute(sql, (last_id, limit))
return txn.fetchall()
return self.runInteraction("get_all_updated_caches", get_all_updated_caches_txn)
def get_cache_stream_token(self):
if self._cache_id_gen:
return self._cache_id_gen.get_current_token()
else:
return 0
def _simple_select_list_paginate(
self,
table,

2
synapse/storage/data_stores/main/__init__.py
View File

@ -32,6 +32,7 @@ from synapse.util.caches.stream_change_cache import StreamChangeCache
from .account_data import AccountDataStore
from .appservice import ApplicationServiceStore, ApplicationServiceTransactionStore
from .cache import CacheInvalidationStore
from .client_ips import ClientIpStore
from .deviceinbox import DeviceInboxStore
from .devices import DeviceStore
@ -110,6 +111,7 @@ class DataStore(
MonthlyActiveUsersStore,
StatsStore,
RelationsStore,
CacheInvalidationStore,
):
def __init__(self, db_conn, hs):
self.hs = hs

131
synapse/storage/data_stores/main/cache.py Normal file
View File

@ -0,0 +1,131 @@
# -*- coding: utf-8 -*-
# Copyright 2019 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.
import itertools
import logging
from twisted.internet import defer
from synapse.storage._base import SQLBaseStore
from synapse.storage.engines import PostgresEngine
from synapse.util import batch_iter
logger = logging.getLogger(__name__)
# This is a special cache name we use to batch multiple invalidations of caches
# based on the current state when notifying workers over replication.
_CURRENT_STATE_CACHE_NAME = "cs_cache_fake"
class CacheInvalidationStore(SQLBaseStore):
def _invalidate_cache_and_stream(self, txn, cache_func, keys):
"""Invalidates the cache and adds it to the cache stream so slaves
will know to invalidate their caches.
This should only be used to invalidate caches where slaves won't
otherwise know from other replication streams that the cache should
be invalidated.
"""
txn.call_after(cache_func.invalidate, keys)
self._send_invalidation_to_replication(txn, cache_func.__name__, keys)
def _invalidate_state_caches_and_stream(self, txn, room_id, members_changed):
"""Special case invalidation of caches based on current state.
We special case this so that we can batch the cache invalidations into a
single replication poke.
Args:
txn
room_id (str): Room where state changed
members_changed (iterable[str]): The user_ids of members that have changed
"""
txn.call_after(self._invalidate_state_caches, room_id, members_changed)
if members_changed:
# We need to be careful that the size of the `members_changed` list
# isn't so large that it causes problems sending over replication, so we
# send them in chunks.
# Max line length is 16K, and max user ID length is 255, so 50 should
# be safe.
for chunk in batch_iter(members_changed, 50):
keys = itertools.chain([room_id], chunk)
self._send_invalidation_to_replication(
txn, _CURRENT_STATE_CACHE_NAME, keys
)
else:
# if no members changed, we still need to invalidate the other caches.
self._send_invalidation_to_replication(
txn, _CURRENT_STATE_CACHE_NAME, [room_id]
)
def _send_invalidation_to_replication(self, txn, cache_name, keys):
"""Notifies replication that given cache has been invalidated.
Note that this does *not* invalidate the cache locally.
Args:
txn
cache_name (str)
keys (iterable[str])
"""
if isinstance(self.database_engine, PostgresEngine):
# get_next() returns a context manager which is designed to wrap
# the transaction. However, we want to only get an ID when we want
# to use it, here, so we need to call __enter__ manually, and have
# __exit__ called after the transaction finishes.
ctx = self._cache_id_gen.get_next()
stream_id = ctx.__enter__()
txn.call_on_exception(ctx.__exit__, None, None, None)
txn.call_after(ctx.__exit__, None, None, None)
txn.call_after(self.hs.get_notifier().on_new_replication_data)
self._simple_insert_txn(
txn,
table="cache_invalidation_stream",
values={
"stream_id": stream_id,
"cache_func": cache_name,
"keys": list(keys),
"invalidation_ts": self.clock.time_msec(),
},
)
def get_all_updated_caches(self, last_id, current_id, limit):
if last_id == current_id:
return defer.succeed([])
def get_all_updated_caches_txn(txn):
# We purposefully don't bound by the current token, as we want to
# send across cache invalidations as quickly as possible. Cache
# invalidations are idempotent, so duplicates are fine.
sql = (
"SELECT stream_id, cache_func, keys, invalidation_ts"
" FROM cache_invalidation_stream"
" WHERE stream_id > ? ORDER BY stream_id ASC LIMIT ?"
)
txn.execute(sql, (last_id, limit))
return txn.fetchall()
return self.runInteraction("get_all_updated_caches", get_all_updated_caches_txn)
def get_cache_stream_token(self):
if self._cache_id_gen:
return self._cache_id_gen.get_current_token()
else:
return 0

2
synapse/storage/data_stores/main/client_ips.py
View File

@ -21,8 +21,8 @@ from twisted.internet import defer
from synapse.metrics.background_process_metrics import wrap_as_background_process
from synapse.storage import background_updates
from synapse.util.caches.descriptors import Cache
from synapse.util.caches import CACHE_SIZE_FACTOR
from synapse.util.caches.descriptors import Cache
logger = logging.getLogger(__name__)

14
synapse/storage/data_stores/main/devices.py
View File

@ -30,16 +30,16 @@ from synapse.logging.opentracing import (
whitelisted_homeserver,
)
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage._base import (
SQLBaseStore,
db_to_json,
make_in_list_sql_clause,
)
from synapse.util.caches.descriptors import Cache
from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause
from synapse.storage.background_updates import BackgroundUpdateStore
from synapse.types import get_verify_key_from_cross_signing_key
from synapse.util import batch_iter
from synapse.util.caches.descriptors import cached, cachedInlineCallbacks, cachedList
from synapse.util.caches.descriptors import (
Cache,
cached,
cachedInlineCallbacks,
cachedList,
)
logger = logging.getLogger(__name__)