Date: Sat, 31 Aug 2002 12:36:16 -0700 From: Kent Stewart <kstewart@owt.com> To: tonerboy <geoffrey@reptiles.org> Cc: "Jack L. Stone" <jackstone@sage-one.net>, derek@durham.net, stable@FreeBSD.ORG Subject: Re: Updating world with least downtime Message-ID: <3D711AB0.80500@owt.com> References: <20020831141126.D90887-100000@iguana.reptiles.org>
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tonerboy wrote: <snip> >>When I replied to the orignal poster, whose main concern was about >>minimizing downtime, my main focus was on explaining my own method used >>which causes a downtime of only one reboot -- a few seconds on a production >>box with 1GHz CPU and 7200rpm HDs. >> >> > Speaking of which, hope that is his email I've stuck beside yours. > Nevertheless, this was posted to stable before I (foolishly evidently), > tried to move this to private email (especially without looking back at > who originally posted the question). > My apologies in any case. And yes, you are quite correct. > Whatever they are feeding the gerbils who churn the wheels makes for a > might bit snappier boot. > > >>I didn't realize this would become a "race" upsmanship discussion. In >>looking back at the records (rather than off the top of head), my actual >>downtime a few months ago when dropping to single-user mode for >>installworld-mergemaster was about 20 mins and this was running mergemaster >>-v and going through each change on a full-service server machine. >> >> > I've been using -svi and <<shudder>> dread the security level you > must use to do that. Especially in light of the s'kiddie traffic I see > trying to get into my network (which invariably traces back to new, > unsecured installs). These are not exclusively IIS boxes (which are > expected) but apache (granted usually linux but FreeBSD as well) & cobalt. > I don't know how they are managing to send ssh from the same, but > it certainly affects my sleeping. I give up on most of them. I have a script that goes back through security and httpd-error.log and report the blatant ones. The firewall denies all incoming. I have a tendancy to pick on the 1433 people in general and in a group. I know none of them are accidents. > > >>Back to the original poster who hasn't replied further, there is a choice >>of being down a few seconds or a few minutes depending on the machine's >>speeds and approach. >> >> > And rather than having the highest zoot box, one CAN have > redundancy for the same cost (2 p3 boxes ~= p4 cost, nay?). A little > preparation and downtime approaches nil. > That yardstick isn't too far off in any succeeding generation > sets. That is my approach. I don't like the P-4. It isn't optimized for my world and have been using AMD's on my upgrades. A whole 3-step down in the speed XP based system costs less than one fast P-4 cpu. A 1600+ XP with your buildworld spread across 3 high speed HDs will do a buildworld in ~20 minutes and installworld to mergemaster in an uptime of less than 4. A lot of people maintain buildworld is cpu bound but I see an I/O bound process for most cpu speeds above 900 Mhz. Moving from ATA-100 to ATA-133 isn't going to buy that much because you only get that rate for a few milliseconds. > > >>Now about the fastest beer guzzler....?? >> >> > Sorry. Even if I pour it in slowly over fifteen minutes, the box > falls to pieces. Now should you be in this neck of the woods around UU > time, some of my peers may offer to gladly accept your offer. In the mean > time, I'll happily loft my tea tolling thumb in your honour (just don't > tell it that's draft in the other hand please). I had to chuckle here because I was getting ready to work in the yard and had a Red Hook ESB in the left hand. We had a French TV team show up locally to record a number of us talking about a local archaeology find (The scientists won YIPEE!!). The French team thought it was the first US beer they had encountered that counted in the European sense. Cheers, Kent -- Kent Stewart Richland, WA http://users.owt.com/kstewart/index.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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