X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/9610664fc566a912915f4a4f5abcf8981c2f9f4b..ad50016c498098d0f0850c3a9de60623a3bd7e1f:/docs/admin/Migration.md diff --git a/docs/admin/Migration.md b/docs/admin/Migration.md index 3f330bb9..13e6d7f5 100644 --- a/docs/admin/Migration.md +++ b/docs/admin/Migration.md @@ -1,10 +1,157 @@ # Database Migrations -This page describes database migrations necessary to update existing databases -to newer versions of Nominatim. +Nominatim offers automatic migrations for versions 4.3+. Please follow +the following steps: -SQL statements should be executed from the PostgreSQL commandline. Execute -`psql nominatim` to enter command line mode. +* Stop any updates that are potentially running +* Update the backend: `pip install -U nominatim-db` +* Go to your project directory and run `nominatim admin --migrate` +* Update the frontend: `pip install -U nominatim-api` +* (optionally) Restart updates + +If you are still using CMake for the installation of Nominatim, then you +need to update the software in one step before migrating the database. +It is not recommended to do this while the machine is serving requests. + +Below you find additional migrations and hints about other structural and +breaking changes. **Please read them before running the migration.** + +!!! note + If you are migrating from a version <4.3, you need to install 4.3 + first and migrate to 4.3 first. Then you can migrate to the current + version. It is strongly recommended to do a reimport instead. + +## 4.5.0 -> master + +### PHP frontend removed + +The PHP frontend has been completely removed. Please switch to the Python +frontend. + +Without the PHP code, the `nominatim refresh --website` command is no longer +needed. It currently omits a warning and does otherwise nothing. It will be +removed in later versions of Nominatim. So make sure you remove it from your +scripts. + +## 4.4.0 -> 4.5.0 + +### New structure for Python packages + +The nominatim Python package has been split into `nominatim-db` and `nominatim-api`. +Any imports need to be adapted accordingly. + +If you are running the Python frontend, change the server module from +`nominatim.server.falcon.server` to `nominatim_api.server.falcon.server`. + +If you are using the Nominatim library, all imports need to be changed +from `nominatim.api.` to `nominatim_api.`. + +If you have written custom tokenizers or sanitizers, the appropriate modules +are now found in `nominatim_db`. + +## 4.2.0 -> 4.3.0 + +### New indexes for reverse lookup + +The reverse lookup algorithm has changed slightly to improve performance. +This change needs a different index in the database. The required index +will be automatically build during migration. Until the new index is available +performance of the /reverse endpoint is significantly reduced. You should +therefore either remove traffic from the machine before attempting a +version update or create the index manually **before** starting the update +using the following SQL: + +```sql +CREATE INDEX IF NOT EXISTS idx_placex_geometry_reverse_lookupPlaceNode + ON placex USING gist (ST_Buffer(geometry, reverse_place_diameter(rank_search))) + WHERE rank_address between 4 and 25 AND type != 'postcode' + AND name is not null AND linked_place_id is null AND osm_type = 'N'; +``` + +## 4.0.0 -> 4.1.0 + +### ICU tokenizer is the new default + +Nominatim now installs the [ICU tokenizer](../customize/Tokenizers.md#icu-tokenizer) +by default. This only has an effect on newly installed databases. When +updating older databases, it keeps its installed tokenizer. If you still +run with the legacy tokenizer, make sure to compile Nominatim with the +PostgreSQL module, see [Installation](Installation.md#building-nominatim). + +### geocodejson output changed + +The `type` field of the geocodejson output has changed. It now contains +the address class of the object instead of the value of the OSM tag. If +your client has used the `type` field, switch them to read `osm_value` +instead. + +## 3.7.0 -> 4.0.0 + +### NOMINATIM_PHRASE_CONFIG removed + +Custom blacklist configurations for special phrases now need to be handed +with the `--config` parameter to `nominatim special-phrases`. Alternatively +you can put your custom configuration in the project directory in a file +named `phrase-settings.json`. + +Version 3.8 also removes the automatic converter for the php format of +the configuration in older versions. If you are updating from Nominatim < 3.7 +and still work with a custom `phrase-settings.php`, you need to manually +convert it into a json format. + +### PHP utils removed + +The old PHP utils have now been removed completely. You need to switch to +the appropriate functions of the nominatim command line tool. See +[Introducing `nominatim` command line tool](#introducing-nominatim-command-line-tool) +below. + +## 3.6.0 -> 3.7.0 + +### New format and name of configuration file + +The configuration for an import is now saved in a `.env` file in the project +directory. This file follows the dotenv format. For more information, see +the [installation chapter](Import.md#configuration-setup-in-env). + +To migrate to the new system, create a new project directory, add the `.env` +file and port your custom configuration from `settings/local.php`. Most +settings are named similar and only have received a `NOMINATIM_` prefix. +Use the default settings in `settings/env.defaults` as a reference. + +### New location for data files + +External data files for Wikipedia importance, postcodes etc. are no longer +expected to reside in the source tree by default. Instead they will be searched +in the project directory. If you have an automated setup script you must +either adapt the download location or explicitly set the location of the +files to the old place in your `.env`. + +### Introducing `nominatim` command line tool + +The various php utilities have been replaced with a single `nominatim` +command line tool. Make sure to adapt any scripts. There is no direct 1:1 +matching between the old utilities and the commands of nominatim CLI. The +following list gives you a list of nominatim sub-commands that contain +functionality of each script: + +* ./utils/setup.php: `import`, `freeze`, `refresh` +* ./utils/update.php: `replication`, `add-data`, `index`, `refresh` +* ./utils/specialphrases.php: `special-phrases` +* ./utils/check_import_finished.php: `admin` +* ./utils/warm.php: `admin` +* ./utils/export.php: `export` + +Try `nominatim --help` for more information about each subcommand. + +`./utils/query.php` no longer exists in its old form. `nominatim search` +provides a replacement but returns different output. + +### Switch to normalized house numbers + +The housenumber column in the placex table uses now normalized version. +The automatic migration step will convert the column but this may take a +very long time. It is advisable to take the machine offline while doing that. ## 3.5.0 -> 3.6.0 @@ -24,7 +171,7 @@ done The debugging UI is no longer directly provided with Nominatim. Instead we now provide a simple Javascript application. Please refer to -[Setting up the Nominatim UI](../Setup-Nominatim-UI) for details on how to +[Setting up the Nominatim UI](Setup-Nominatim-UI.md) for details on how to set up the UI. The icons served together with the API responses have been moved to the @@ -68,6 +215,14 @@ configuration file, run the following command after updating: ./utils/setup.php --setup-website ``` +### Update SQL code + +To update the SQL code to the leatest version run: + +``` +./utils/setup.php --create-functions --enable-diff-updates --create-partition-functions +``` + ## 3.4.0 -> 3.5.0 ### New Wikipedia/Wikidata importance tables