perf: replace KeyError exception with dict.get() in BoundStatement.bind()#14
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mykaul wants to merge 28 commits into
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perf: replace KeyError exception with dict.get() in BoundStatement.bind()#14mykaul wants to merge 28 commits into
mykaul wants to merge 28 commits into
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Introduce the data layer for Private Link client routes support: - ClientRoutesChangeType enum for CLIENT_ROUTES_CHANGE event types - ClientRouteProxy dataclass and ClientRoutesConfig for user-facing configuration - _Route frozen dataclass for immutable route records - _RouteStore for thread-safe route storage with atomic update/merge and preferred route selection that avoids unnecessary connection_id migration when multiple routes exist for the same host
Add _ClientRoutesHandler which manages the full lifecycle of dynamic address translation via system.client_routes: - initialize(): loads all routes at startup and on control connection reconnect - handle_client_routes_change(): processes CLIENT_ROUTES_CHANGE events with targeted merge or full refresh depending on event data - _query_all_routes_for_connections(): complete refresh query using connection_id IN (...) - _query_routes_for_change_event(): targeted query grouping by connection_id with host_id IN (...) per group - _execute_routes_query(): common query execution and result parsing with proxy address override support - resolve_host(): host_id to (address, port) resolution with DNS lookup
- ClientRoutesEndPointFactory: creates endpoints from system.peers rows by extracting host_id, deferring address translation and DNS resolution until connection time - ClientRoutesEndPoint: endpoint that resolves via _ClientRoutesHandler on each connection attempt, ensuring immediate reaction to route changes and CLIENT_ROUTES_CHANGE events
Cluster: - Add client_routes_config parameter with mutual exclusivity check against endpoint_factory - Create _ClientRoutesHandler and ClientRoutesEndPointFactory when client_routes_config is provided ControlConnection: - Register CLIENT_ROUTES_CHANGE event watcher when handler is present - Forward events to handler via _handle_client_routes_change - Trigger full route re-read on control connection reconnection
Cover ClientRouteEntry/ClientRoutesConfig validation, _RouteStore get/merge operations, _ClientRoutesHandler initialization, ClientRoutesEndPoint resolution with and without route mappings, and SSL check_hostname rejection with client_routes_config.
Add comprehensive integration tests covering: - TCP proxy and NLB emulator infrastructure for simulating private link connectivity - query_routes filtering with different connection/host ID combinations - Full private-link connectivity verifying all driver connections go exclusively through the NLB proxy - Dynamic route updates via REST API with driver reconnection through new proxy ports
Recently scylladb started to rely on the options "--auth-superuser-name" and "--auth-superuser-salted-password" to ensure that a cassandra/cassandra user exists for tests - without those options a default superuser no longer exists.
…ames Skip the regex scanner and stack-based parser in parse_casstype_args() when the type string has no parentheses. For simple types like 'AsciiType' or 'org.apache.cassandra.db.marshal.FloatType', go directly to lookup_casstype_simple() which is just a prefix strip + dict lookup. This avoids re.Scanner, re.split on ':' / '=>', int() try/except, and list-of-lists stack manipulation for the common case of non-parameterized types. Signed-off-by: Yaniv Kaul <yaniv.kaul@scylladb.com>
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The time.sleep(10) in setup_keyspace() is redundant because callers already ensure the cluster is fully ready before calling it: - use_cluster() calls start_cluster_wait_for_up() which uses wait_for_binary_proto=True + wait_other_notice=True, then wait_for_node_socket() per node - External cluster path (wait=False) had no sleep anyway Remove the wait parameter entirely and its associated sleep, saving 10s per cluster startup.
Replace fixed sleeps with condition-based polling to speed up tests: - simulacron/utils.py: replace 5s sleep with HTTP endpoint polling (max 15s timeout, typically <1s) - test_authentication.py: replace 10s sleep with auth readiness poll that tries connecting with default credentials - upgrade/__init__.py: replace 10s auth sleep with same polling pattern - upgrade/test_upgrade.py: replace 3x 20s sleeps (60s total) with control connection readiness polling Total potential saving: ~95s of unconditional waiting per test run.
Replace fixed sleeps with condition-based polling in four test files: - test_shard_aware.py: replace 25s of sleeps (5+10+5+5) with wait_until_not_raised polling for reconnection after shard connection close and iptables blocking - test_metrics.py: replace 15s of sleeps (5+5+5) with polling for cluster recovery and node-down detection - test_tablets.py: replace 13s of sleeps (3+10) with polling for metadata refresh and decommission completion - simulacron/test_connection.py: replace 20s of sleeps (10+10) with polling for quiescent pool state Total potential saving: ~73s of unconditional waiting.
… for invalidation The tablet tests were intermittently failing because: 1. get_query_trace() used the default 2s max_wait, which is too short under resource pressure (--smp 2). Increased to 10s. 2. test_tablets_invalidation_decommission_non_cc_node used a fixed time.sleep(2) hoping tablet metadata invalidation would complete. Replaced with wait_until polling for the tablet record to be purged (0.5s delay, 20 attempts = 10s budget).
- test_cluster.py: replace sleep(1) x10 iterations with connect(wait_for_all_pools=True) for deterministic pool readiness - test_query.py: replace sleep(5) with wait_until polling for 'Preparing all known prepared statements' log message - test_connection.py: replace sleep(2) with wait_until polling for host_down listener notification
…superuser config Use set_configuration_options() (the Python API behind `ccm updateconf`) to set auth_superuser_name and auth_superuser_salted_password directly in the YAML config instead of passing them via the SCYLLA_EXT_OPTS environment variable.
…ema_agreement min(self._timeout, total_timeout - elapsed) raises TypeError when control_connection_timeout is set to None, which is explicitly documented as a supported value (meaning no timeout). Guard the min() call so that when self._timeout is None, we use only the remaining schema agreement wait time.
Patch reactor.running to False in setUp() so that maybe_start() always enters the branch that spawns the reactor thread. Without this, leaked global reactor state from prior tests can leave reactor.running as True, causing maybe_start() to skip thread creation and the reactor.run mock to never be called — making the assertion in test_connection_initialization fail intermittently. Observed in CI on PyPy 3.11 + macOS x86 (Rosetta 2), where timing differences make the reactor state leak more likely.
The column kind filter at line 2744 used 'clustering_key' but system_schema.columns uses 'clustering' as the kind value. This caused clustering columns to not be excluded from the 'other columns' loop, resulting in them being processed twice (once as clustering key, once as regular column). The correct value 'clustering' was already used 6 lines above in the clustering key extraction loop.
ScyllaDB doesn't support triggers, so skip the triggers query when connected to ScyllaDB. This is detected by checking if the connection has shard awareness (using the existing _is_not_scylla() method). Changes to both SchemaParserV3 and SchemaParserV4: - Modified _query_all() to conditionally append triggers query only for non-ScyllaDB - Modified _query_all() response unpacking to use array slicing for cleaner code - Modified get_table() in V3 to conditionally query triggers This eliminates unnecessary failed queries to system_schema.triggers on ScyllaDB. Signed-off-by: Yaniv Kaul <yaniv.kaul@scylladb.com>
- Fix spelling: 'tring' → 'string' in docstring - Remove extra 't' at end of comment - Refactor complex list comprehension for clarity - Use 'is None' instead of '== None' for None comparison Co-authored-by: mykaul <4655593+mykaul@users.noreply.github.com>
Co-authored-by: mykaul <4655593+mykaul@users.noreply.github.com>
The pool module emits a DEBUG log message when selecting a connection for a query. Emitting a log message for every query is too noisy. Since Python logging lacks a TRACE level, just remove the log.
…nd() Replace try/except KeyError with dict.get() + sentinel pattern in the per-column binding loop of BoundStatement.bind(). This loop runs once per column per execute() call for dict-style bindings, making it a hot path. Using dict.get() avoids the overhead of raising and catching KeyError for every missing/optional column. The sentinel object (_BIND_SENTINEL) is necessary to distinguish a missing key from an explicit None value in the bound dict.
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Summary
try/except KeyErrorwithdict.get()+ sentinel in the per-column binding loop ofBoundStatement.bind()session.execute()call for dict-style bindings, making it a hot path_BIND_SENTINEL = object()distinguishes missing keys from explicitNonevaluesMotivation
When binding a dict to a prepared statement, the driver iterates over every column in the prepared statement metadata and looks up the value in the user-supplied dict. The previous code used
try: values_dict[col.name] / except KeyError:which raises and catches aKeyErrorfor every missing/optional column. While CPython 3.11+ made try/except cheaper when no exception fires, the exception does fire for every omitted column, and raising exceptions is inherently expensive (~5-10x slower than a dict.get() + identity check).For workloads using protocol v4+ (the common case), omitted columns are bound as
UNSET_VALUE, so theKeyErrorpath fires frequently for partial-column updates.Changes
cassandra/query.py: Add module-level_BIND_SENTINEL = object()sentinel, replace the try/except block withdict.get(col.name, _BIND_SENTINEL)+is notcheckTesting
tests/unit/test_query.py,tests/unit/test_cluster.py,tests/unit/test_resultset.py)