prerequisites. There are also step-by-step instructions available for
the following operating systems:
- * [Ubuntu 20.04](../appendix/Install-on-Ubuntu-20.md)
- * [Ubuntu 18.04](../appendix/Install-on-Ubuntu-18.md)
- * [CentOS 8](../appendix/Install-on-Centos-8.md)
- * [CentOS 7.2](../appendix/Install-on-Centos-7.md)
+ * [Ubuntu 24.04](Install-on-Ubuntu-24.md)
+ * [Ubuntu 22.04](Install-on-Ubuntu-22.md)
These OS-specific instructions can also be found in executable form
in the `vagrant/` directory.
### Software
-For compiling:
+!!! Warning
+ For larger installations you **must have** PostgreSQL 11+ and PostGIS 3+
+ otherwise import and queries will be slow to the point of being unusable.
+ Query performance has marked improvements with PostgreSQL 13+ and PostGIS 3.2+.
+
+For running Nominatim:
+
+ * [PostgreSQL](https://www.postgresql.org) (9.6+ will work, 11+ strongly recommended)
+ * [PostGIS](https://postgis.net) (2.2+ will work, 3.0+ strongly recommended)
+ * [osm2pgsql](https://osm2pgsql.org) (1.8+, optional when building with CMake)
+ * [Python 3](https://www.python.org/) (3.7+)
+
+Furthermore the following Python libraries are required:
+
+ * [Psycopg3](https://www.psycopg.org)
+ * [Python Dotenv](https://github.com/theskumar/python-dotenv)
+ * [psutil](https://github.com/giampaolo/psutil)
+ * [Jinja2](https://palletsprojects.com/p/jinja/)
+ * [PyICU](https://pypi.org/project/PyICU/)
+ * [PyYaml](https://pyyaml.org/) (5.1+)
+ * [datrie](https://github.com/pytries/datrie)
+
+These will be installed automatically when using pip installation.
+
+When using legacy CMake-based installation:
* [cmake](https://cmake.org/)
* [expat](https://libexpat.github.io/)
* [bzip2](http://www.bzip.org/)
* [zlib](https://www.zlib.net/)
* [ICU](http://site.icu-project.org/)
- * [Boost libraries](https://www.boost.org/), including system and filesystem
+ * [nlohmann/json](https://json.nlohmann.me/)
+ * [Boost libraries](https://www.boost.org/), including system and file system
* PostgreSQL client libraries
* a recent C++ compiler (gcc 5+ or Clang 3.8+)
-For running Nominatim:
+For running continuous updates:
- * [PostgreSQL](https://www.postgresql.org) (9.5+ will work, 11+ strongly recommended)
- * [PostGIS](https://postgis.net) (2.2+)
- * [Python 3](https://www.python.org/) (3.6+)
- * [Psycopg2](https://www.psycopg.org) (2.7+)
- * [Python Dotenv](https://github.com/theskumar/python-dotenv)
- * [psutil](https://github.com/giampaolo/psutil)
- * [Jinja2](https://palletsprojects.com/p/jinja/)
- * [PyICU](https://pypi.org/project/PyICU/)
- * [PyYaml](https://pyyaml.org/) (5.1+)
- * [datrie](https://github.com/pytries/datrie)
- * [PHP](https://php.net) (7.0 or later)
+ * [pyosmium](https://osmcode.org/pyosmium/)
+
+For running the Python frontend:
+
+ * [SQLAlchemy](https://www.sqlalchemy.org/) (1.4.31+ with greenlet support)
+ * [asyncpg](https://magicstack.github.io/asyncpg) (0.8+, only when using SQLAlchemy < 2.0)
+ * one of the following web frameworks:
+ * [falcon](https://falconframework.org/) (3.0+)
+ * [starlette](https://www.starlette.io/)
+ * [uvicorn](https://www.uvicorn.org/)
+
+For running the legacy PHP frontend (deprecated, will be removed in Nominatim 5.0):
+
+ * [PHP](https://php.net) (7.3+)
* PHP-pgsql
* PHP-intl (bundled with PHP)
- * PHP-cgi (for running queries from the command line)
-For running continuous updates:
-
- * [pyosmium](https://osmcode.org/pyosmium/)
For dependencies for running tests and building documentation, see
the [Development section](../develop/Development-Environment.md).
### Hardware
A minimum of 2GB of RAM is required or installation will fail. For a full
-planet import 64GB of RAM or more are strongly recommended. Do not report
+planet import 128GB of RAM or more are strongly recommended. Do not report
out of memory problems if you have less than 64GB RAM.
-For a full planet install you will need at least 900GB of hard disk space.
+For a full planet install you will need at least 1TB of hard disk space.
Take into account that the OSM database is growing fast.
Fast disks are essential. Using NVME disks is recommended.
Even on a well configured machine the import of a full planet takes
-around 2 days. On traditional spinning disks, 7-8 days are more realistic.
+around 2.5 days. When using traditional SSDs, 4-5 days are more realistic.
## Tuning the PostgreSQL database
maintenance_work_mem = (10GB)
autovacuum_work_mem = 2GB
work_mem = (50MB)
- effective_cache_size = (24GB)
synchronous_commit = off
- checkpoint_segments = 100 # only for postgresql <= 9.4
- max_wal_size = 1GB # postgresql > 9.4
- checkpoint_timeout = 10min
+ max_wal_size = 1GB
+ checkpoint_timeout = 60min
checkpoint_completion_target = 0.9
+ random_page_cost = 1.0
+ wal_level = minimal
+ max_wal_senders = 0
The numbers in brackets behind some parameters seem to work fine for
-64GB RAM machine. Adjust to your setup. A higher number for `max_wal_size`
+128GB RAM machine. Adjust to your setup. A higher number for `max_wal_size`
means that PostgreSQL needs to run checkpoints less often but it does require
the additional space on your disk.
and even reduce `autovacuum_work_mem` further. This will reduce the amount
of memory that autovacuum takes away from the import process.
-For the initial import, you should also set:
-
- fsync = off
- full_page_writes = off
-
-Don't forget to reenable them after the initial import or you risk database
-corruption.
-
-
## Downloading and building Nominatim
### Downloading the latest release
also check out the osm2pgsql subproject:
```
-git clone --recursive git://github.com/openstreetmap/Nominatim.git
+git clone --recursive https://github.com/openstreetmap/Nominatim.git
```
The development version does not include the country grid. Download it separately:
```
-wget -O Nominatim/data/country_osm_grid.sql.gz https://www.nominatim.org/data/country_grid.sql.gz
+wget -O Nominatim/data/country_osm_grid.sql.gz https://nominatim.org/data/country_grid.sql.gz
```
### Building Nominatim
+#### Building the latest development version with pip
+
+Nominatim is easiest to run from its own virtual environment. To create one, run:
+
+ sudo apt-get install virtualenv
+ virtualenv /srv/nominatim-venv
+
+To install Nominatim directly from the source tree into the virtual environment, run:
+
+ /srv/nominatim-venv/bin/pip install packaging/nominatim-{db,api}
+
+#### Building in legacy CMake mode
+
+!!! warning
+ Installing Nominatim through CMake is now deprecated. The infrastructure
+ will be removed in Nominatim 5.0. Please switch to pip installation.
+
The code must be built in a separate directory. Create the directory and
change into it.
sudo make install
```
+!!! warning
+ The default installation no longer compiles the PostgreSQL module that
+ is needed for the legacy tokenizer from older Nominatim versions. If you
+ are upgrading an older database or want to run the
+ [legacy tokenizer](../customize/Tokenizers.md#legacy-tokenizer) for
+ some other reason, you need to enable the PostgreSQL module via
+ cmake: `cmake -DBUILD_MODULE=on ../Nominatim`. To compile the module
+ you need to have the server development headers for PostgreSQL installed.
+ On Ubuntu/Debian run: `sudo apt install postgresql-server-dev-<postgresql version>`
+ The legacy tokenizer is deprecated and will be removed in Nominatim 5.0
+
+
Nominatim installs itself into `/usr/local` per default. To choose a different
installation directory add `-DCMAKE_INSTALL_PREFIX=<install root>` to the
cmake command. Make sure that the `bin` directory is available in your path
projects / nominatim.git / blobdiff