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13-03-2019 7:26pm#1
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Facebook is one of those things that so many use, and yet feal ashamed that they do or to admit that they do - Instagram seams more cooler today.
anyway I use it sparingly, and today seamed the first day it was down . (so I was jesting a little
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political analyst wrote: »Presumably, Facebook employs a lot of intelligent people. So why have they failed to resolve this issue? Why aren't they telling us what the cause of the outage is?
As a former (amateur in fairness but with half a degree
) web developer, this kind of issue is incredibly difficult to pin down. With a system as vast as Facebook, with so many servers, data centres, databases and constantly changing / updating pieces of code involved, any one of them could be a point of failure and troubleshooting involves going through them all until the source of the problem is discovered.
In this case, as the issue affected everything - Facebook, Messenger, Instagram and WhatsApp, I'm guessing that the fault lay either with a database or a database server. If the database where user information is stores went down for whatever reason, the whole family of Facebook apps would have died, as they did today. Given how long the outage lasted, I'm guessing their primary database server had a physical power outage unrelated to the building itself (as in a power grid level failure) and they simply had to wait for the electricity utility to fix the problem. Either that, or a serious fault with their telecoms provider resulted in data being unable to contact the aforementioned databases.
Another option is that they rolled out some new backend code for those databases and that this was faulty, but it strikes me as unlikely seeing as they'd surely have had the previous code backed up at most to instantly restore if the new one didn't work - and more than that, would almost certainly test such code in a sandbox before bringing it online.
Basically, it's the internet, sh!t happens, and it genuinely isn't always as easy as it might sound for engineers to rapidly address issues. With a behemoth like Facebook, troubleshooting in terms of going through every possible point of failure one by one will in all probability take a few hours.0 -
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