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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
Quote:
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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DOVEADM-INSTANCE(1)						      Dovecot						       DOVEADM-INSTANCE(1)

NAME
doveadm-instance - Manage the list of running Dovecot instances SYNOPSIS
doveadm [-Dv] [-f formatter] instance list doveadm [-Dv] instance remove name | base_dir DESCRIPTION
The doveadm instance commands are used to manage the list of Dovecot instances running on the server. In most installations there is only one Dovecot instance, but in some cases is may be useful to have more (e.g. running director proxy and backend in the same server). Instances are added to the list automatically when Dovecot is started. Each instance is uniquely identified by its base_dir setting. Instances can be named by setting instance_name in each instance's dovecot.conf. When an instance is named, it can be accessed easily by giving -i instance_name command line parameter for Dovecot binaries (e.g. doveadm). OPTIONS
Global doveadm(1) options: -D Enables verbosity and debug messages. -f formatter Specifies the formatter for formatting the output. Supported formatters are: flow prints each line with key=value pairs. pager prints each key: value pair on its own line and separates records with form feed character (^L). tab prints a table header followed by tab separated value lines. table prints a table header followed by adjusted value lines. -v Enables verbosity, including progress counter. ARGUMENTS
name The value of an instance's instance_name setting. base_dir The base directory of a Dovecot instance. COMMANDS
instance list doveadm instance list This command lists the seen Dovecot instances. instance remove doveadm instance remove name | base_dir This command removes the specified instance. REPORTING BUGS
Report bugs, including doveconf -n output, to the Dovecot Mailing List <dovecot@dovecot.org>. Information about reporting bugs is avail- able at: http://dovecot.org/bugreport.html SEE ALSO
doveadm(1) Dovecot v2.2 2012-02-16 DOVEADM-INSTANCE(1)
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