TT-RSS has become less demanding in terms of system requisites and is able to work in more environments than before (for example, open_basedir support). But we know that it is advanced software and can be demanding. I think it would be good to know some providers that are proven to allow a flawlessly working TT-RSS installation.
We know the official requisites (as of 12-08-2013):
http://tt-rss.org/redmine/projects/tt-r ... ilityNotes
You need PHP 5.3 compiled with (at least) the following modules (those are actually very common and should be available unless specifically disabled by your hosting provider):
CURL (not required, but highly recommended) OR support for remote fopen()
posix functions (for the multiprocess update daemon, otherwise not needed)
GD (for OTP QR code generation, otherwise not needed)
PostgreSQL or MySQL depending on the database server used
Some safe_mode-related restrictions may stop parts of tt-rss from functioning. This is usually only a problem for (unsupported) shared hosting configurations.
http://tt-rss.org/redmine/projects/tt-r ... erver-side
You will need a dedicated web hosting account (i.e. VDS) or access to a server running generic modern LAMP stack or compatible. Shared hosting account may work but is not supported. Running tt-rss on windows is possible but not supported.
Additionally, tt-rss requires:
PHP version 5.3 or newer (detailed PHP requirements)
PostgreSQL or MySQL (InnoDB is required, MyISAM will not work).
You can use either of the databases, but PostgreSQL should run tt-rss faster.
But it's also important to take into account stuff that is not required, but can prevent a perfect working. For example:
-Very short PHP timeout that you can't change.
-PHP command line access for the cron job for updates.
-TT-RSS databases can grow big. Some providers limit the size of databases.
-Crazy antivirus reporting on TT-RSS.
-Points for PostgreSQL instead of MySQL.
-Points for custom php.ini.
-Points for git support so you can update directly from trunk.
-Points for being a good provider in everything else: support, safety, supporting more languages than PHP...
Disclaimer: I'm going to switch hosting providers soon and need to find the best possible for tt-rss.