prerequisites. There are also step-by-step instructions available for
the following operating systems:
+ * [Ubuntu 22.04](../appendix/Install-on-Ubuntu-22.md)
* [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)
These OS-specific instructions can also be found in executable form
in the `vagrant/` directory.
### Software
!!! Warning
- For larger installations you **must have** PostgreSQL 11+ and Postgis 3+
+ 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 PostgrSQL 13+ and Postgis 3.2+.
+ Query performance has marked improvements with PostgreSQL 13+ and PostGIS 3.2+.
For compiling:
* [PostgreSQL](https://www.postgresql.org) (9.6+ will work, 11+ strongly recommended)
* [PostGIS](https://postgis.net) (2.2+ will work, 3.0+ strongly recommended)
- * [Python 3](https://www.python.org/) (3.6+)
+ * [Python 3](https://www.python.org/) (3.7+)
* [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/)
+ * [SQLAlchemy](https://www.sqlalchemy.org/) (1.4.31+ with greenlet support)
+ * [asyncpg](https://magicstack.github.io/asyncpg) (0.8+)
* [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)
+ * [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 running the experimental Python frontend:
+
+ * one of the following web frameworks:
+ * [falcon](https://falconframework.org/) (3.0+)
+ * [starlette](https://www.starlette.io/)
+ * [uvicorn](https://www.uvicorn.org/)
+
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.
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
+ max_wal_size = 1GB
checkpoint_timeout = 10min
checkpoint_completion_target = 0.9
fsync = off
full_page_writes = off
-Don't forget to reenable them after the initial import or you risk database
+Don't forget to re-enable them after the initial import or you risk database
corruption.
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