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Code Issues Projects Releases Packages Wiki Activity Actions 3

Add new sequences to port DB script (#8387)

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Erik Johnston 2020-09-24 13:43:49 +01:00 committed by GitHub
parent ac11fcbbb8
commit 6fdf577593
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2 changed files with 25 additions and 0 deletions
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1
changelog.d/8387.feature Normal file
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@ -0,0 +1 @@
Add experimental support for sharding event persister.

24
scripts/synapse_port_db
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@ -628,6 +628,7 @@ class Porter(object):
self.progress.set_state("Setting up sequence generators")
await self._setup_state_group_id_seq()
await self._setup_user_id_seq()
await self._setup_events_stream_seqs()
self.progress.done()
except Exception as e:
@ -804,6 +805,29 @@ class Porter(object):
return self.postgres_store.db_pool.runInteraction("setup_user_id_seq", r)
def _setup_events_stream_seqs(self):
def r(txn):
txn.execute("SELECT MAX(stream_ordering) FROM events")
curr_id = txn.fetchone()[0]
if curr_id:
next_id = curr_id + 1
txn.execute(
"ALTER SEQUENCE events_stream_seq RESTART WITH %s", (next_id,)
)
txn.execute("SELECT -MIN(stream_ordering) FROM events")
curr_id = txn.fetchone()[0]
if curr_id:
next_id = curr_id + 1
txn.execute(
"ALTER SEQUENCE events_backfill_stream_seq RESTART WITH %s",
(next_id,),
)
return self.postgres_store.db_pool.runInteraction(
"_setup_events_stream_seqs", r
)
##############################################
# The following is simply UI stuff