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https://github.com/osm-search/Nominatim.git
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10d99893f9
Indexing scans the placex table sequentially during indexing on the initial import. That is okay because we know that all rows need to be processed anywhere. When continuing the import, however, a large part might already be indexed, so that the process spends a lot of time going through rows that are no longer of interest. Create a supporting index for all unindexed rows to speed up the scan. This is the same index as used later for updates.
177 lines
8.5 KiB
Python
177 lines
8.5 KiB
Python
"""
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Implementation of the 'import' subcommand.
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"""
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import logging
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from pathlib import Path
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import psutil
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from ..tools.exec_utils import run_legacy_script
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from ..db.connection import connect
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from ..db import status, properties
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from ..version import NOMINATIM_VERSION
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from ..errors import UsageError
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# Do not repeat documentation of subcommand classes.
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# pylint: disable=C0111
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# Using non-top-level imports to avoid eventually unused imports.
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# pylint: disable=E0012,C0415
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LOG = logging.getLogger()
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class SetupAll:
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"""\
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Create a new Nominatim database from an OSM file.
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"""
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@staticmethod
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def add_args(parser):
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group_name = parser.add_argument_group('Required arguments')
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group = group_name.add_mutually_exclusive_group(required=True)
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group.add_argument('--osm-file', metavar='FILE',
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help='OSM file to be imported.')
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group.add_argument('--continue', dest='continue_at',
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choices=['load-data', 'indexing', 'db-postprocess'],
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help='Continue an import that was interrupted')
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group = parser.add_argument_group('Optional arguments')
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group.add_argument('--osm2pgsql-cache', metavar='SIZE', type=int,
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help='Size of cache to be used by osm2pgsql (in MB)')
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group.add_argument('--reverse-only', action='store_true',
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help='Do not create tables and indexes for searching')
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group.add_argument('--no-partitions', action='store_true',
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help=("Do not partition search indices "
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"(speeds up import of single country extracts)"))
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group.add_argument('--no-updates', action='store_true',
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help="Do not keep tables that are only needed for "
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"updating the database later")
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group = parser.add_argument_group('Expert options')
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group.add_argument('--ignore-errors', action='store_true',
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help='Continue import even when errors in SQL are present')
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group.add_argument('--index-noanalyse', action='store_true',
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help='Do not perform analyse operations during index')
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@staticmethod
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def run(args): # pylint: disable=too-many-statements
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from ..tools import database_import
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from ..tools import refresh
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from ..indexer.indexer import Indexer
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if args.osm_file and not Path(args.osm_file).is_file():
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LOG.fatal("OSM file '%s' does not exist.", args.osm_file)
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raise UsageError('Cannot access file.')
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if args.continue_at is None:
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database_import.setup_database_skeleton(args.config.get_libpq_dsn(),
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args.data_dir,
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args.no_partitions,
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rouser=args.config.DATABASE_WEBUSER)
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LOG.warning('Installing database module')
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with connect(args.config.get_libpq_dsn()) as conn:
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database_import.install_module(args.module_dir, args.project_dir,
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args.config.DATABASE_MODULE_PATH,
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conn=conn)
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LOG.warning('Importing OSM data file')
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database_import.import_osm_data(Path(args.osm_file),
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args.osm2pgsql_options(0, 1),
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drop=args.no_updates,
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ignore_errors=args.ignore_errors)
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with connect(args.config.get_libpq_dsn()) as conn:
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LOG.warning('Create functions (1st pass)')
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refresh.create_functions(conn, args.config, args.sqllib_dir,
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False, False)
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LOG.warning('Create tables')
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database_import.create_tables(conn, args.config, args.sqllib_dir,
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reverse_only=args.reverse_only)
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refresh.load_address_levels_from_file(conn, Path(args.config.ADDRESS_LEVEL_CONFIG))
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LOG.warning('Create functions (2nd pass)')
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refresh.create_functions(conn, args.config, args.sqllib_dir,
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False, False)
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LOG.warning('Create table triggers')
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database_import.create_table_triggers(conn, args.config, args.sqllib_dir)
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LOG.warning('Create partition tables')
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database_import.create_partition_tables(conn, args.config, args.sqllib_dir)
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LOG.warning('Create functions (3rd pass)')
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refresh.create_functions(conn, args.config, args.sqllib_dir,
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False, False)
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LOG.warning('Importing wikipedia importance data')
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data_path = Path(args.config.WIKIPEDIA_DATA_PATH or args.project_dir)
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if refresh.import_wikipedia_articles(args.config.get_libpq_dsn(),
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data_path) > 0:
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LOG.error('Wikipedia importance dump file not found. '
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'Will be using default importances.')
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if args.continue_at is None or args.continue_at == 'load-data':
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LOG.warning('Initialise tables')
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with connect(args.config.get_libpq_dsn()) as conn:
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database_import.truncate_data_tables(conn, args.config.MAX_WORD_FREQUENCY)
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LOG.warning('Load data into placex table')
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database_import.load_data(args.config.get_libpq_dsn(),
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args.data_dir,
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args.threads or psutil.cpu_count() or 1)
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LOG.warning('Calculate postcodes')
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run_legacy_script('setup.php', '--calculate-postcodes',
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nominatim_env=args, throw_on_fail=not args.ignore_errors)
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if args.continue_at is None or args.continue_at in ('load-data', 'indexing'):
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if args.continue_at is not None and args.continue_at != 'load-data':
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with connect(args.config.get_libpq_dsn()) as conn:
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SetupAll._create_pending_index(conn, args.config.TABLESPACE_ADDRESS_INDEX)
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LOG.warning('Indexing places')
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indexer = Indexer(args.config.get_libpq_dsn(),
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args.threads or psutil.cpu_count() or 1)
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indexer.index_full(analyse=not args.index_noanalyse)
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LOG.warning('Post-process tables')
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with connect(args.config.get_libpq_dsn()) as conn:
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database_import.create_search_indices(conn, args.config,
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args.sqllib_dir,
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drop=args.no_updates)
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LOG.warning('Create search index for default country names.')
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database_import.create_country_names(conn, args.config)
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webdir = args.project_dir / 'website'
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LOG.warning('Setup website at %s', webdir)
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refresh.setup_website(webdir, args.phplib_dir, args.config)
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with connect(args.config.get_libpq_dsn()) as conn:
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try:
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dbdate = status.compute_database_date(conn)
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status.set_status(conn, dbdate)
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LOG.info('Database is at %s.', dbdate)
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except Exception as exc: # pylint: disable=broad-except
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LOG.error('Cannot determine date of database: %s', exc)
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properties.set_property(conn, 'database_version',
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'{0[0]}.{0[1]}.{0[2]}-{0[3]}'.format(NOMINATIM_VERSION))
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return 0
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@staticmethod
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def _create_pending_index(conn, tablespace):
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""" Add a supporting index for finding places still to be indexed.
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This index is normally created at the end of the import process
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for later updates. When indexing was partially done, then this
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index can greatly improve speed going through already indexed data.
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"""
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if conn.index_exists('idx_placex_pendingsector'):
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return
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with conn.cursor() as cur:
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LOG.warning('Creating support index')
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if tablespace:
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tablespace = 'TABLESPACE ' + tablespace
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cur.execute("""CREATE INDEX idx_placex_pendingsector
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ON placex USING BTREE (rank_address,geometry_sector)
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{} WHERE indexed_status > 0
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""".format(tablespace))
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conn.commit()
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