Re:Ice cold archive storage
by jefftk on Thursday April 11, 2019 @11:23AM
(#19635470)
> In the real world, they, like Azure and Amazon, will have single point in time outages that will wipe that out for a year or more.
An outage affects availability, but as long as it's not permanent it doesn't affect durability. For example, if I add a new backup provider that stores data on-premise I've added a (nearly) independent data store. This substantially decreases my risk of losing my data unrecoverably (increases durability) but if I don't set up any sort of automatic failover I'm still at risk for substantial outages (no practical increase in availability).
> Someone on the marketing side of the team decided that was a "competitive" number to present, outwards, and someone in engineering was tasked with, working backward from that number, coming up with some plausible calculation that resulted in it.
I would be incredibly surprised if that happened. That's not the way I've seen anyone work here.
(Disclosure: I work at Google, though not in Cloud)
An outage affects availability, but as long as it's not permanent it doesn't affect durability. For example, if I add a new backup provider that stores data on-premise I've added a (nearly) independent data store. This substantially decreases my risk of losing my data unrecoverably (increases durability) but if I don't set up any sort of automatic failover I'm still at risk for substantial outages (no practical increase in availability).
For example, I don't believe Amazon has ever lost any S3 data (https://www.quora.com/Has-Amazon-S3-ever-lost-data-permanent...), and if they did it would be a big deal. Same with the other major cloud storage providers.
> Someone on the marketing side of the team decided that was a "competitive" number to present, outwards, and someone in engineering was tasked with, working backward from that number, coming up with some plausible calculation that resulted in it.
I would be incredibly surprised if that happened. That's not the way I've seen anyone work here.
(Disclosure: I work at Google, though not in Cloud)