Re:Tell HN: AWS appears to be down again
by manquer on Wednesday December 22, 2021 @11:39AM
(#29651615)
Only if they are truly independent of each other.
You and AWS are using similar chips similar hard disks even with similar failure rates.
If you both use same hardware from say batch both can defects and fail at similar times.or you use the same file systems, that say corrupts both your backups.
90% is not a magic number , you need to know AWS supply chains and practices thoroughly and keep yours different enough not to have same risks as AWS does for your system to have independent probability of failures.
Re:Tell HN: AWS appears to be down again
by RA_Fisher on Monday December 27, 2021 @08:40AM
(#29702407)
True. One would want to continually decorrelate services or model the dependencies. Redundancy will help even with some dependency, but you raise an important point.
You and AWS are using similar chips similar hard disks even with similar failure rates.
If you both use same hardware from say batch both can defects and fail at similar times.or you use the same file systems, that say corrupts both your backups.
90% is not a magic number , you need to know AWS supply chains and practices thoroughly and keep yours different enough not to have same risks as AWS does for your system to have independent probability of failures.