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100 Things: #21 - marypoppins = (superman + starship) / god;
Rome wasn't burned in a day, you know. Wait, maybe it was.
100 Things: #21
The industry standard of "Five Nines" with regard to service uptime is that an online service should be up for 99.999% of the year.  This means the service is allowed 5.26 minutes of downtime per year.

Change that to Six Nines (99.9999%), and the amount of allowable downtime drops to 31.5 seconds per year.


1 fire or Burn Something
fishsupreme From: fishsupreme Date: May 14th, 2012 10:38 pm (UTC) ((Link Me!))
99.999% uptime allows for basically one reboot per year, which makes patching vulnerabilities every month pretty difficult. Pretty much the only way to maintain it is 100% redundancy -- that is, have no single points of failure in the entire service, up to and including hosting a replica in an entirely different physical location.

1 fire or Burn Something