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On Tue 23 August 2011 14:10:57 kashani did opine thusly: |
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> On 8/23/2011 1:43 PM, Alan McKinnon wrote: |
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> > I can't fix it without running afoul of the Change Management |
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> > process, and today's emergency reboot didn't leave me any time |
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> > to poke around and determine the effect of removing hal. |
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> > |
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> > This is how life in corporate IT works.... |
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> |
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> I hate Corp CM and it's one of the reasons I stay in startups. |
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It's |
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> job is to slow normal change down so much so that every change |
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> becomes an emergency. |
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> |
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> However next time I have to deal with one I am shoving |
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mathematical |
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> proof of "there is no rollback in systems" down there throats. |
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> http://www.iu.hio.no/~mark/papers/totalfield.pdf |
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|
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Haven't read the pdf yet, but I just have to share this joke. |
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|
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Tonight's CM was an unscheduled emergency reboot. This gave me |
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opportunity to do something I've been dying to do for ages, enter |
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this: |
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|
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Install plan: reboot server |
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Test plan: ping server |
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Backout plan: unreboot server <====== :-) |
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|
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On the whole our CM process is sane. The manager knows how |
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infrastructure works: |
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|
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If that undersea optical link goes down, I'm fixing it right now and |
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to hell with the paperwork and process. |
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|
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Contrast with my gf's job at the bank. That one truly is a case where |
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to change anything, she has to invent imaginary catastrophic |
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emergencies. More often than not, she causes them in undetectable ways |
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just to get her job done. |
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|
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|
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> |
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> For those that aren't ginormous systems nerds this bit sums it up |
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> nicely. |
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> |
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> "There is a deeper issue with roll-back in partial systems. If a |
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> system is in contact with another system, e.g. receiving data, or |
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> if we have partitioned a system into loosely coupled pieces only |
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> one of which is being changed, then the other system becomes a part |
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> of the total system and we must write a hypothetical journal for |
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> the entire system in order to achieve a consistent rollback." |
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> |
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> kashani |
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-- |
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alan dot mckinnon at gmail dot com |