Date: Tue, 3 Jun 2003 16:53:58 +0200 (CEST) From: Konrad Heuer <kheuer2@gwdg.de> To: Chuck Swiger <cswiger@mac.com> Cc: freebsd-questions@freebsd.org Subject: Re: Upgrading a live server with rdist Message-ID: <20030603164732.D77677-100000@gwdu60.gwdg.de> In-Reply-To: <3EDCB272.1080506@mac.com>
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On Tue, 3 Jun 2003, Chuck Swiger wrote: > Konrad Heuer wrote: > [ ... ] > > As far as I see there is little chance to do this without carefully > > restarting all processes, e.g. by shutting down into single user mode and > > returning to multi user mode. > > It is advisable to switch into single-user mode when updating the system files, > agreed. > > > If you replace program files and shared libraries used by currently > > running processes, this will cause the corresponding processes to be > > aborted abnormally in case of page fault requiring a page-in from the > > program files or shared libraries. > > Generally not; the system doesn't delete files that are in use even if you > overwrite those files: it hangs on to the inode and won't free the space until > nobody needs that file. Yes, that's true in general, but if you replace program files and/or libraries needed by processes invoked before this processes WILL FAIL in case of a page-in. Try if you don't believe. Regards Konrad Heuer (kheuer2@gwdg.de) ____ ___ _______ GWDG / __/______ ___ / _ )/ __/ _ \ Am Fassberg / _// __/ -_) -_) _ |\ \/ // / 37077 Goettingen /_/ /_/ \__/\__/____/___/____/ Germany
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