Disk change done right





  • what about a direct link?



  • Credit your sources? BUT THIS IS THE INTERNET! FUCK PEOPLE WHO PRODUCE CONTENT!

    .... I don't get why the trades are valued in dollars if it was a trading operation in the Europeens. Are you guys so pathetic that you don't even use your own shitty currency in your own shitty stock markets?


  • Discourse touched me in a no-no place

    Thu 25 Oct 2007



  • Damn FB took its time delivering that image to me.



  • @blakeyrat said:

    .... I don't get why the trades are valued in dollars if it was a trading operation in the Europeens.

    Probably because the guy doesn't have € on his keyboard, and dollars work about as well when it comes to showing big figures.



  • No, I just don't believe that a guy can simply go and make a random hardware change in a computer handling 20% of the world's stock trading.

    Not even behind a padlocked door?

    Plus the "Disaster Recovery" system decides to...lose all active database operations? I thought we had figured out ACID like 40 years ago.


  • :belt_onion:

    @blakeyrat said:

    I don't get why the trades are valued in dollars if it was a trading operation in the Europeens

    It means every one implicitly agrees that dollar is more stable, and thus better as a measuring stone. This implicitness is in the benefit of those who use $ as currency, so no need to complain if you are paid in it. After all the value for a currency more than anything depends on the consensus (this is the only case when believing in something makes it true, like magic).



  • AKA europeans are weenies. Gotcha.


  • Discourse touched me in a no-no place

    @dse said:

    It means every one implicitly agrees that dollar is more stable

    Or it was being told for a US audience.



  • @anonymous234 said:

    No, I just don't believe that a guy can simply go and make a random hardware change in a computer handling 20% of the world's stock trading.

    A colleague of mine one day decided to perform a change during the day without authorisation, which was foolish, but **not uncommon**.
    This suggest that they've done it before many many times, so don't think there is any problem for the action. Given that there is a script for bring the new disk online on-the-fly, maybe the system is designed to allow extra disk space be added right away on need.


  • @anonymous234 said:

    Plus the "Disaster Recovery" system decides to...lose all active database operations? I thought we had figured out ACID like 40 years ago.

    Btw, I think we had systems that support "sudden powerloss tolarating database file" property around Y2K. Given the database size mentioned in the article (The equivalent of 100 DVD's worth of raw data entered the databases each day), do you think that the holidays are long enough for the data-migration part of database upgrade. I suspect it's still using old system with just new UI. :stuck_out_tongue:



  • @NeighborhoodButcher said:

    Damn FB took its time delivering that image to me.

    And whoever wooden-tabled it left out the actual design choice truly responsible for the disaster:

    The homebrew code took one look at the new configuration and immediately spazzed out. This monged scrap of pisspoor geek-scribble had decided the best course of action was to bring down the production end of the system and bring online the disaster recovery (DR) end, which is normal behaviour when it detects a catastrophic 'failure'. It’s designed to bring up the working side of the setup as quickly as possible. Sadly, what with this system being fully-replicated at both sites (to [cough] ensure seamless recovery), the exact same bug was almost instantly triggered on the DR end, so in under a minute, the hateful script had taken offline the entire system in much the same manner as chucking a spanner into a running engine might stop a car.
    What's essentially happened there is that somebody failed to understand why RAID is not backup.

  • Discourse touched me in a no-no place

    Ah yes, replicating the disaster, perfectly!



  • @blakeyrat said:

    .... I don't get why the trades are valued in dollars if it was a trading operation in E-Penis.

    FTFY



  • @dkf said:

    Or it was being told for a US audience.

    This seems likely. In The Netherlands, monetary values are typically denoted in euros, even if the original sum is in dollars or (pre-2002) guilders. The original currency sum may or may not be included.


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