Re: [AMaViS-user] Taking note of map changes while amavisd-new is running?

From: Mark Martinec <Mark.Martinec+amavis(at)ijs.si>
Date: Tue Jul 31 2007 - 04:07:39 EDT

Patrick,

> The scenario:
> 1. amavisd reads in a file upon startup e.g. using read_hash for
> @local_domains_maps to read in a list of domains and subdomains
> 2. The file is edited while amavisd is running
>
> Question:
> Will amavisd children take notice of the changes when they restart after
> $max_request or do I need to restart the master server process?

As Gary noted, a change in a config file (and effect of any calls executed from config file(s)) will only take effect on start of a master process, i.e. on 'amavisd start' or 'amavisd reload'.

The read_hash, read_array, read_text, they all read data into memory, just like direct assignements to variables in the rest of a config file.

The only lookups that are dynamic in a sense that data may be changing on-the-fly and take effect immediately on a next lookup, are SQL and LDAP lookups.

In principle a hash (i.e. an associative array) could be 'tie'-d to a database such as a Berkeley DB, or cdb, gdb ... (tie() is a Perl function). In this case Perl would hide such association from a program and the effect would be a dynamic lookup into a file-based database on each hash lookup by amavisd, changes to a database could take effect immediately (subject to possible caching). This is seldom used, mostly because explicit locking would be required for a reliable access to a changing database tied to a hash.

  Mark

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https://lists.sourceforge.net/lists/listinfo/amavis-user AMaViS-FAQ:http://www.amavis.org/amavis-faq.php3 AMaViS-HowTos:http://www.amavis.org/howto/ Received on Tue Jul 31 04:07:56 2007