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Homework and Emergencies Emergency UNIX and Linux Support Different OS Kernel Update Frequency Post 302566501 by galanom on Thursday 20th of October 2011 12:52:37 PM
Old 10-20-2011
Originally Posted by majid.merkava
Hi guys

I'm trying to configure a collaboration suit (PHP, PostgreSQL, Apache) plus a mail server(Sendmail and Dovecot) on a single box. It will be used heavily 24*7. So having a long up time is really needed. I'm looking for 3 to 6 month up time. I want to know about kernel update frequency(because they are causing server reboot) for different operating systems such as Linux(CentOS, Debian, Ubuntu Server Edition), FreeBSD NetBSD, OpenBSD.

Could anyone help? I'm not trying to make a Linux vs BSD question as it is against forum rules.
First of all, I quite agree with the cluster idea.
If it is really of the question, put whatever distro you want and simple DON'T update kernel. You are not forced to apply each update of the distro. Actually in a production machine, you don't update at all, at least not automatically. If for example the "automatic" update request new version of apache, your machine will have a small down time. If problems with the new configuration files arise, then it will be big down time.

Don't update anything.
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Apache::Session::Browseable::MySQL(3pm) 		User Contributed Perl Documentation		   Apache::Session::Browseable::MySQL(3pm)

Apache::Session::Browseable::MySQL - Add index and search methods to Apache::Session::MySQL SYNOPSIS
use Apache::Session::Browseable::MySQL; my $args = { DataSource => 'dbi:mysql:sessions', UserName => $db_user, Password => $db_pass, LockDataSource => 'dbi:mysql:sessions', LockUserName => $db_user, LockPassword => $db_pass, # Choose your browseable fileds Index => 'uid mail', }; # Use it like Apache::Session my %session; tie %session, 'Apache::Session::Browseable::MySQL', $id, $args; $session{uid} = 'me'; $session{mail} = 'me@me.com'; $session{unindexedField} = 'zz'; untie %session; # Apache::Session::Browseable add some global class methods # # 1) search on a field (indexed or not) my $hash = Apache::Session::Browseable::MySQL->searchOn( $args, 'uid', 'me' ); foreach my $id (keys %$hash) { print $id . ":" . $hash->{$id}->{mail} . " "; } # 2) Parse all sessions # a. get all sessions my $hash = Apache::Session::Browseable::MySQL->get_key_from_all_sessions(); # b. get some fields from all sessions my $hash = Apache::Session::Browseable::MySQL->get_key_from_all_sessions('uid', 'mail') # c. execute something with datas from each session : # Example : get uid and mail if mail domain is my $hash = Apache::Session::Browseable::MySQL->get_key_from_all_sessions( sub { my ( $session, $id ) = @_; if ( $session->{mail} =~ /mydomain.com$/ ) { return { $session->{uid}, $session->{mail} }; } } ); foreach my $id (keys %$hash) { print $id . ":" . $hash->{$id}->{uid} . "=>" . $hash->{$id}->{mail} . " "; } DESCRIPTION
Apache::Session::browseable provides some class methods to manipulate all sessions and add the capability to index some fields to make research faster. SEE ALSO
Apache::Session AUTHOR
Xavier Guimard, <x.guimard@free.fr> COPYRIGHT AND LICENSE
Copyright (C) 2009 by Xavier Guimard This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.1 or, at your option, any later version of Perl 5 you may have available. perl v5.14.2 2010-12-08 Apache::Session::Browseable::MySQL(3pm)

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