Merge pull request #1836 from lonvia/rework-large-location-II

[nominatim.git] / docs / admin / Installation.md

diff --git a/docs/admin/Installation.md b/docs/admin/Installation.md
index 89afd2bcdda3cb011c13d0264c166a24fd48a7e8..bc97212ee2d663dc4cd1dc0c5556eb3e432c30ba 100644 (file)
--- a/docs/admin/Installation.md
+++ b/docs/admin/Installation.md
@@ -4,8 +4,9 @@ This page contains generic installation instructions for Nominatim and its
 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)
-  * [Ubuntu 16.04](../appendix/Install-on-Ubuntu-16.md)
+  * [CentOS 8](../appendix/Install-on-Centos-8.md)
   * [CentOS 7.2](../appendix/Install-on-Centos-7.md)
 
 These OS-specific instructions can also be found in executable form
@@ -25,24 +26,20 @@ and can't offer support.
 For compiling:
 
   * [cmake](https://cmake.org/)
-  * [libxml2](http://xmlsoft.org/)
-  * a recent C++ compiler
-
-Nominatim comes with its own version of osm2pgsql. See the
-[osm2pgsql README](https://github.com/openstreetmap/osm2pgsql/blob/master/README.md#building)
-for additional dependencies required for compiling osm2pgsql.
-
-For running tests:
-
-  * [behave](http://pythonhosted.org/behave/)
-  * [Psycopg2](https://initd.org/psycopg)
-  * [nose](https://nose.readthedocs.io)
-  * [phpunit](https://phpunit.de)
+  * [expat](https://libexpat.github.io/)
+  * [proj](https://proj.org/)
+  * [bzip2](http://www.bzip.org/)
+  * [zlib](https://www.zlib.net/)
+  * [Boost libraries](https://www.boost.org/), including system and filesystem
+  * PostgreSQL client libraries
+  * a recent C++ compiler (gcc 5+ or Clang 3.8+)
 
 For running Nominatim:
 
-  * [PostgreSQL](https://www.postgresql.org) (9.3 or later)
-  * [PostGIS](https://postgis.org) (2.2 or later)
+  * [PostgreSQL](https://www.postgresql.org) (9.3+)
+  * [PostGIS](https://postgis.org) (2.2+)
+  * [Python 3](https://www.python.org/)
+  * [Psycopg2](https://initd.org/psycopg)
   * [PHP](https://php.net) (7.0 or later)
   * PHP-pgsql
   * PHP-intl (bundled with PHP)
@@ -52,6 +49,12 @@ For running continuous updates:
 
   * [pyosmium](https://osmcode.org/pyosmium/) (with Python 3)
 
+For running tests:
+
+  * [behave](http://pythonhosted.org/behave/)
+  * [nose](https://nose.readthedocs.io)
+  * [phpunit](https://phpunit.de) >= 7.3
+
 ### Hardware
 
 A minimum of 2GB of RAM is required or installation will fail. For a full
@@ -89,14 +92,23 @@ The numbers in brackets behind some parameters seem to work fine for
 means that PostgreSQL needs to run checkpoints less often but it does require
 the additional space on your disk.
 
+Autovacuum must not be switched off because it ensures that the
+tables are frequently analysed. If your machine has very little memory,
+you might consider setting:
+
+    autovacuum_max_workers = 1
+
+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. Autovacuum must not be switched off because it ensures that the
-tables are frequently analysed.
+corruption.
+
 
 ### Webserver setup
 
@@ -109,13 +121,15 @@ from there.
 Make sure your Apache configuration contains the required permissions for the
 directory and create an alias:
 
-    <Directory "/srv/nominatim/build/website">
-      Options FollowSymLinks MultiViews
-      AddType text/html   .php
-      DirectoryIndex search.php
-      Require all granted
-    </Directory>
-    Alias /nominatim /srv/nominatim/build/website
+``` apache
+<Directory "/srv/nominatim/build/website">
+  Options FollowSymLinks MultiViews
+  AddType text/html   .php
+  DirectoryIndex search.php
+  Require all granted
+</Directory>
+Alias /nominatim /srv/nominatim/build/website
+```
 
 `/srv/nominatim/build` should be replaced with the location of your
 build directory.
@@ -143,20 +157,35 @@ follows:
 Tell nginx that php files are special and to fastcgi_pass to the php-fpm
 unix socket by adding the location definition to the default configuration.
 
-    root /srv/nominatim/build/website;
-    index search.php index.html;
-    location ~ [^/]\.php(/|$) {
-        fastcgi_split_path_info ^(.+?\.php)(/.*)$;
-        if (!-f $document_root$fastcgi_script_name) {
-            return 404;
-        }
-        fastcgi_pass unix:/var/run/php5-fpm.sock;
-        fastcgi_index search.php;
-        include fastcgi.conf;
+``` nginx
+root /srv/nominatim/build/website;
+index search.php;
+location / {
+    try_files $uri $uri/ @php;
+}
+
+location @php {
+    fastcgi_param SCRIPT_FILENAME "$document_root$uri.php";
+    fastcgi_param PATH_TRANSLATED "$document_root$uri.php";
+    fastcgi_param QUERY_STRING    $args;
+    fastcgi_pass unix:/var/run/php/php7.3-fpm.sock;
+    fastcgi_index index.php;
+    include fastcgi_params;
+}
+
+location ~ [^/]\.php(/|$) {
+    fastcgi_split_path_info ^(.+?\.php)(/.*)$;
+    if (!-f $document_root$fastcgi_script_name) {
+        return 404;
     }
+    fastcgi_pass unix:/var/run/php7.3-fpm.sock;
+    fastcgi_index search.php;
+    include fastcgi.conf;
+}
+```
 
 Restart the nginx and php5-fpm services and the website should now be available
 at `http://localhost/`.
 
 
-Now continue with [importing the database](Import-and-Update.md).
+Now continue with [importing the database](Import.md).