Imported from: http://groups.google.com/group/in-portal-dev/browse_thread/thread/4ddcf57e2c5e33aa#

There are situation, when there is a need to process large amounts of data in short time.

To do that I propose to minimize action count, that In-Portal performs during it's initialization including:

doing database queries that won't help to perform requested action (e.g. loading phrase cache, when phrase are not used at all)
performing initialization of system parts that are not used (e.g. session initialization, when no login is made)

In total In-Portal is temporarily converted to sort of unix-like daemon (standalone service), that quickly performs given requests. That's why I called such operation mode as "daemon mode".

Usage (one of following):

add $_CONFIG['Misc']['DaemonMode'] = '1'; to "system/config.php" file when system-wide daemon mode is required
add define('DAEMON', 1); in PHP file, where daemon mode is required (e.g. cron.php, run_event.php, index.php, etc.); it should happen before FULL_PATH constant definition

Tables never used in daemon mode:

CachedUrls (mod-rewrite caching won't work)
PhraseCache (phrase and configuration variable caching won't work)
Counters (counters, like member count won't work)
ThemeFiles (for mod-rewrite url parsing)
CustomField (no custom field data can be accessible)
Forms (new forms are not added to admin tree for their submission reviewing)

Proposed database table permissions that should be at least for this to work:

GRANT SELECT ON `inportal_database`.`inp_Phrase` TO 'inportal_user'@'localhost'; 
GRANT SELECT ON `inportal_database`.`inp_ConfigurationValues` TO 'inportal_user'@'localhost'; 
GRANT SELECT ON `inportal_database`.`inp_Language` TO 'inportal_user'@'localhost'; 
GRANT SELECT ON `inportal_database`.`inp_Modules` TO 'inportal_user'@'localhost'; 
GRANT SELECT ON `inportal_database`.`inp_Theme` TO 'inportal_user'@'localhost'; 
GRANT SELECT ON `inportal_database`.`inp_Skins` TO 'inportal_user'@'localhost'; 
GRANT SELECT ON `inportal_database`.`inp_SiteDomains` TO 'inportal_user'@'localhost';

As you can clearly see there is only 7 database table needed, instead of 71 tables, that could be used (I'm not saying that all of them are used on each run).

What won't be working:

building links using "use_section" parameter of "m_Link" tag
new agents are not added based on found "RegularEvents" unit config option (already existing agents will work of course)
new records in Category table are not added based theme file scanning (so you should do "Rebuild Theme Files" while daemon mode is off)
importing language pack
new theme file discovery (for mod-rewrite url detection)

For all this to work you need to enable memcache caching.

daemon_mode_feature.patch

Related Tasks

INP-786 - Getting issue details... STATUS