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On 2010/09/02 10:39 PM, Stephen Harris wrote: We do shared webhosting mainly so only really use Apache, Exim, MySQL, PostGreSQL, etc. So I guess it's not as "enterprise" as your situation but with hundreds of thousands of files on every server, being updated on a regular basis I do think that our servers fall in the same category. But then again we only use STABLE release software where possible. And I honestly haven't come across an issue where an rc script doesn't work properly after reboot. I've had cased where a kernel didn't work as expected though, but we don't reboot a server every 2 months to see if the kernel might have failed.On Thu, Sep 02, 2010 at 10:29:35PM +0200, Rudi Ahlers wrote:On 2010/09/02 07:39 PM, Stephen Harris wrote: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.You never upgrade the application? The database? Make config changes? Wow... to live in such a static world :-) Most of our problems aren't OS related, they're app or config related... "change shared memory parameters for oracle", "start this at boot time", "add new network interface"... these all may prevent the server from booting cleanly and aren't the OS's fault. You don't want to find that out during a crisis scenario! -- Kind Regards Rudi Ahlers, SoftDux MD Website: http://www.SoftDux.com Blog: http://Blog.SoftDux.com Support: http://Billing.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 Fax: 086 609 6128 |
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