[CentOS] how long to reboot server ?

Rudi Ahlers Rudi at SoftDux.com
Thu Sep 2 16:29:35 EDT 2010



On 2010/09/02 07:39 PM, Stephen Harris wrote:
> On Thu, Sep 02, 2010 at 01:27:22PM -0400, Brian Mathis wrote:
>> Uptime is no longer a badge of honor.  Typically there will have been
>> some kernel updates that require a reboot, so a long uptime means they
>> haven't been applied.  Also, it is a good idea to reboot periodically
>> to catch anything that was not set up to start on boot correctly.  A
>> server should always cleanly start up with all services it needs
>> without the need for human intervention.
> Indeed.  At my place we reboot production machines every 90 days.  Or
> are meant to; I don't think management have worked out that rebooting
> 10,000 machines every 90 days means a lot of reboot activity!!
>
> (The idea being to verify that services will come up after some form
> of DC-wide outage; last think we want in a "business contingency" situation
> is a few hundred servers not working properly 'cos the rc scripts are
> broken)

Interesting..... This generally won't happen on a rock solid OS like 
CentOS, unless someone really screwed up badly or it's a super-custom 
build which can't be updated using normal CentOS repositories.

We don't reboot servers (CentOS at least), unless we really really need 
to. For minor kernel updates that doesn't give much more than what we 
need we don't reboot either. Only for more critical / major / highly  
important kernel updates, or hardware upgrades do we reboot.

-- 

Kind Regards
Rudi Ahlers, SoftDux MD

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