D4Science Infrastructure

I think that you can install it using the following command:

pecl install solr

Ok, thanks.

Another requirement: can you install the php module for Mongo?

From deb package or using:

pecl install mongodb

Done.
I did not understand from the documentation if it's possibile to configure memcached as the session cache. You can do it manually, after the steps from the web configuration have been completed, adding the following lines to /var/www/node0-d-puma.d4science.org/configuration.php:

public $cache_handler = 'memcached';
public $memcached_server_host = '127.0.0.1';
public $memcached_server_port = '11211';
public $memcached_persist = '1';
public $memcached_compress = '1';
public $cachetime = '15';
public $session_handler = 'memcached';
public $session_memcached_server_host = '127.0.0.1';
public $session_memcached_server_port = '11211';

The Joomla redirect rules do not work on the apache version installed on the VM. We must move from apache to nginx, the work will require some downtime (10/15 minutes if all goes well, up to a couple of hours if we must revert to apache).

Let me know when I can stop the service to perform the required changes.

The sooner the better ... we are going to release the service soon.

OK, I'm starting now.