IRC log for #gllug on 20081020

00:14.29*** join/#gllug DiscordianUK (n=ch@chills.demon.co.uk)
00:17.54*** join/#gllug Leeds (n=richardc@n058152239053.netvigator.com)
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04:44.35morsingLeeds!
06:42.27*** join/#gllug Stephmw (n=steph@host81-129-157-128.range81-129.btcentralplus.com)
06:52.26morsingStephmw!
07:27.37halimorning
07:39.52morsing'morning dear
07:40.00morsinghali: What did you have for breakfast?
07:40.08halicoffee
07:40.17haliand sql server migration plans
07:40.21morsingNice
07:42.26morsingWhy is is impossible to find a location for the Hub in MK?
07:47.57morsingSo no-one knows...
08:06.45Leedsthere's a Hub in Mongkok?
08:08.57antiphasePut it under one of the cows
08:14.35morsing06:11 < morsing> Bye...
08:14.43morsingErmm...
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08:22.33morsingsabinef72!
09:00.26*** join/#gllug Stephmw (n=steph@79.173.141.66)
09:01.58morsingStephmw!
09:17.07bilarh_morning folks
09:18.59morsingbilarh_: http://www.morsing.cc/photos/StarterMotor/imm002.jpg
09:19.46bilarh_why did you paint it brown? :P
09:19.51morsing??
09:20.08bilarh_is that copperslip or is it rust?
09:20.36morsingIt's... Graphite? Or whatever brushes are made off...
09:20.57morsingMixed with copper, yes
09:21.14bilarh_so i'm guessing your starter motor stopped working at some point? :)
09:21.41morsingbilarh_: No - I dropped a washer into it while doing some re-wiring :((((((
09:21.55bilarh_so now it's stopped working? :)
09:22.05bilarh_washers suck
09:22.20bilarh_i always drop them in random places and have to replace them
09:22.29bilarh_and they *always* get jammed somewhere where you can't get them
09:24.06bilarh_i was busy in the weekend too, changing my cam belt
09:24.15bilarh_took me 6 hours all in all
09:24.30bilarh_including a trip to halfords to pick up 2x 10mm allen keys and a g-clamp
09:25.23bilarh_and i only have two screws and a bracket over as well :D
09:27.39morsingbilarh_: It never stopped working...
09:28.08morsingBut tell me why there's a silly hole in the casing for washers to fall into in the first place...
09:28.43bilarh_it's the chevette, isn't it?
09:28.45morsingI always have surplus bits when I finishes jobs :)
09:28.49morsingKinda...
09:28.55bilarh_but with a 350?
09:28.58antiphaseThere shouldn't be, unless you're missing a band around the brush access holes
09:29.00morsingThere's no point in that hole
09:29.09morsing"Band"?
09:29.15bilarh_i think it's there to let in water
09:29.23morsingErmm... BLoody hope not
09:29.29bilarh_so that you have to buy a new one every so often
09:29.41bilarh_btw, has anyone seen my tin foil hat?
09:29.52antiphaseI've seen old starter motors with a detahcable steel band so you can inspect the brushes
09:29.55morsingAnyway, got all the re-wiring done. Proper stuff! 40mm2 with junction boxes and everything :)
09:30.09morsingantiphase: That makess more sense
09:30.15antiphaseHow many lorry engines are you planning on starting at once?
09:30.16morsingI should get a new band then
09:30.28morsingantiphase: Only the one in my car
09:30.51antiphase40mm^2 is crazy for a car engine unless you have a couple of kilowatts of ICE in there as well
09:31.17morsingWhat I've put in can handle 300A continuosly all the way through
09:31.24antiphaseI used 35 on a diesel Land Rover once and it was massive overkill, and an absolute pig to work with
09:31.39antiphaseYou could stuff 1000A down a few metres of that stuff
09:31.54bilarh_is 40mm2 0awg?
09:32.03morsing40mm2 is good for 300A - and should be able to handle my 8.8L when I put that in
09:32.06antiphaseBigger I'd think
09:32.09morsing0awg?
09:32.16bilarh_damn that is a beefy cable
09:32.36bilarh_morsing: i thought your chevette was supposed to be a stripped out 402m racer?
09:32.42morsingbilarh_: So beefy I had to buy a new heavy duty battery terminal lfor it to fit into :)
09:32.48morsing402m?
09:32.50bilarh_i.e. you'd want to put as little cables as possible in :)
09:32.54bilarh_402.33m
09:32.58morsing?!
09:33.01morsingYou've lost me
09:33.11bilarh_quarter mile?
09:33.17morsingIt's never going to be stripped anything
09:33.33antiphaseThe problem is you have cable which is continuously rated for 300A, whereas it only takes a couple of seconds to start an engine
09:33.35morsingIt'll be full everything proper car with power to move it.
09:33.49morsing"Problem"?
09:34.10antiphaseWhat happens is you bolt it to the starter motor, and because it's so stiff it rips the terminal off after the engine vibrates a bit
09:34.12bilarh_i just bought my first "practical performance car" magazine btw, it's bloody ace! Finally a car magazine that I feel I can "connect" with
09:34.29morsingantiphase: It's soft cable
09:34.35antiphaseIT is now ;)
09:34.36morsing0.35 strands
09:35.02morsingbilarh_: Magazines are just too expensive unfortunately
09:35.16bilarh_morsing: one of life's little pleasures
09:35.23morsingantiphase: And the terminal is an M8 stud
09:35.26bilarh_especially when they have old ratty tuned cars :D
09:35.44morsingSorry, M10
09:35.58halisighs
09:36.27morsinghands hali another cawfy
09:36.38halihaving a very nice cawfy from pret
09:36.43haliprefectly weighted
09:36.43bilarh_beats hali with a snapped off rusty bolt head
09:37.07halibilarh_: you were predricting me slagging off non-standard in-car audio? :)
09:40.19bilarh_no i was anticipating a non-coherent rant about cars, the environment, sandals vs socks and eating lentils, generally :)
09:40.39morsing300A ftw
09:40.51bilarh_morsing: super-overkill :)
09:40.55bilarh_morsing: it must weigh a ton
09:40.58bilarh_tonne
09:41.57morsingIt's not over-kill. Weighed a bit but not too bad
09:42.30halibilarh_: hm, actually i ate humous yesterday
09:43.03bilarh_hali: did you wear sandals and read the guardian as well?
09:43.30halibilarh_: in my pants only and, seriously, me reading the guardian? :)
09:44.06bilarh_humous is pretty guardian, isn't it?
09:44.10halino
09:44.25halifrom israel, and they are pretty facist :)
09:44.28bilarh_or possibly middle-england daily mail
09:44.37bilarh_daily mail it is then :)
09:44.55halii do pretend to be middle-class
09:45.22halii even signed up for a membership in "friends of kew gardens" last week, how middle-class is that? :)
09:46.44bilarh_i wouldn't call it middle-class... it's more totally elton john and freddie mercury :)
09:47.00bilarh_can i start calling you batty boy now? :D
09:47.42morsingsnogs bilarh_
10:13.51*** join/#gllug Provito (n=Provito@pdpc/supporter/sustaining/Provito)
10:14.11morsingProvito!
10:14.22*** join/#gllug Blapto (n=martin@62.189.100.228)
10:14.36morsingBlapto!
10:16.35Provitobah, system problems at the moment
10:16.45Provitotime for an overclockers.co.uk spree I think
10:19.31Blaptomorsing!
10:19.38Blaptomorsing: did you eat it yet?
11:45.46ChoHagWhat sort of load average should a heavily-used nfs server have?
11:46.06Blapto0?
11:46.17BlaptoUnless you start to get shagged by iowait
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11:47.14morsingdick_turpin!
11:47.32ChoHagI have 9.
11:47.34morsingChoHag: Too vague a question
11:47.34dick_turpin:-)
11:47.51morsingChoHag: Are you running this on your iPhone?
11:48.02ChoHagheh.
11:48.03ChoHagNo.
11:48.09morsing9 is wrong then
11:48.12ChoHagAlmost as bad though - it's running SLES.
11:48.25morsingChoHag: vmstat 2
11:48.28Blaptoplay with iostat to see if you can work out what's giong on
11:48.34ChoHagiowait doesn't seem to be excessive.
11:48.35Blaptoor vmstat, yes, handy if it's a multi core box
11:48.48ChoHagI'm not sure nfs is the culprit but I can't just turn it off and see.
11:48.52morsingChoHag: What's r, b, and w in vmstat?
11:51.55ChoHag0, 0 and between 15 and 20.
11:52.14ChoHagAssuming by w you mean cpu wait ('wa').
11:52.24z00daxand oprofile isnt available ?
11:53.01morsingChoHag: Your profile is with disk IO
11:53.13morsingOr maybe network...
11:53.15morsingHmm
11:53.37morsingDoes iostat not list anything for network interfaces or disks?
11:57.12ChoHagiostat indicates about 250-300 IO reqs /sec.
11:57.27morsing...
11:57.28ChoHagLinux only sees one (raided) device.
11:57.44morsingWhat's the % busy on that device?
11:58.29ChoHagI don't know where that is.
11:58.52morsingHmm... I'm guessing a Linux limitation
11:59.05ChoHagProbably. Linux is good at them.
12:05.59antiphaseLoad average isn't really that useful for anything anyway
12:06.03antiphasewonders why it matters
12:06.12Blaptoantiphase: good indicator of things going screwy
12:06.28antiphaserests his case
12:06.29Blaptosmoke, fire, etc.
12:06.37morsingAnyone here good at setting up tmssa?
12:06.49morsingantiphase: It matters a lot
12:07.01ChoHagI think it might have something to do with the hanging modprobe command.
12:07.24antiphaseI know what it is, and I know how it works, and it still is of little use on a day-to-day basis, or as a metric for judging operating parameters
12:07.45morsingIt's very useful but you have to understand it
12:08.18antiphaseIf you say so
12:08.57*** join/#gllug Stephmw (n=steph@host81-129-157-128.range81-129.btcentralplus.com)
12:09.02bilarh_playing devils advocate, what is load average anyway?
12:09.02bilarh_what does the number signify?
12:09.07bilarh_:)
12:10.02Blaptoaverage number of processes waiting to execute over the last 1 minute, 5 minutes, 15 minutes.
12:10.12antiphaseRunning, not waiting
12:10.25bilarh_in the run-queue, isn't it?
12:10.29bilarh_runnable
12:10.48antiphaseWhich suggests they are running, rather than sleeping. Whether they're waiting or not is variable of course :)
12:10.56bilarh_true :-)
12:11.15BlaptoI don't mean wait()ing
12:11.22Blaptosorry, being ambiguous.
12:11.24bilarh_i was just splitting hairs :)
12:11.38z00daxbut not all jobs
12:11.45z00daxstuff in the kernel's run-queue is not reflected in la
12:11.50antiphaseBut whatever, if you haven't run out of CPU time, you're OK, which means that CPU utilisation is a far more meaningful metric of business
12:12.24Blaptoantiphase: what if your disk isn't keeping up?
12:12.28Blaptoor network
12:12.44antiphaseIt's perfectly reasonable to run web servers with ridiculous load averages because of the intermittent nature of their activity
12:12.49bilarh_blapto: but then your load average would sink, as the processes would be in wait
12:13.10bilarh_blapto: i.e. not in the run-queeu
12:13.34Blaptobilarh_: unless they're shit
12:14.25bilarh_blapto: unless they're somehow busy waiting on i/o?
12:14.47z00daxthere are better ways to measure i/o saturation than la
12:14.50Blaptoas in reading data?
12:15.47bilarh_blapto: no what i meant was, if the i/o subsys could not keep up, the processes read/write's would block the process, so the load average would sink
12:16.14Blaptoto be honest, I'm losing track
12:18.35ChoHagWe don't alert on load avg, but if it rises then I like to know about it.
12:19.25ChoHagAnd the fact that a nfs box is consistently above 5 indicates either than I shouldn't pay attention to averages < about 7.5 or that something is busy which shouldn't be.
12:19.52ChoHagCPU idle time, which is monitored more actively, is right where it should be.
12:20.06ChoHagAnyway - lunch.
12:20.35morsingBeer
12:21.08ChoHagClose - bread.
12:22.26z00daxhow many cores does that machine have ?
12:24.06z00daxla of 5 on a machine with 32 cores, should be mostly ok
12:24.47antiphaseI wouldn't give it a second look unless it was at least nCores+1
12:25.29z00daxs/+/*/
12:25.56z00daxerr.. 2 times the number of cores is what I meant, till you hit that, the machine is mostly quite responsive. unless there is a specific issue.
12:26.13z00daxlike someone running openssl speed tests in a loop
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12:49.20morsingStephmw!
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13:16.53Leedsmorsing!
13:29.39morsingLeeds!
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18:53.26kjshttp://www.todaysbigfail.com/view/20080823
18:53.28kjshahahhahahah
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20:27.34morsingboudiccas!
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21:52.24Discordiancongrats if you just got a PhD
21:52.40haliyay
21:52.44DrWethrinThanks :)
21:52.48haliyou can sort out morsings passport now ;)
21:53.13DrWethrinHeh. I'm not sure I can do that until I get an official degree conferral
21:53.38haliwhats your phd in?
21:53.42Discordiandoesn't have a degree
21:55.18DrWethrinhali: Organic electronics. Transistors, specifically
21:56.02halihandy
21:56.36DrWethrinalways :)
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23:11.58z00daxwooo
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