3 ms·
EBS isn't really RAIDed, it's virtualized block storage with replicas. The issue Reddit experienced wasn't drive failure, though, it was network degradation.
by parasubvert 16y ago
EBS isn't really RAIDed, it's virtualized block storage with replicas. The issue Reddit experienced wasn't drive failure, though, it was network degradation. The solution is to deploy redundant replicas in different availability zones (and/or regions, if you can). Reddit unfortunately wasn't built for that.
This isn't really any different from an on-premise application. An availability zone by definition implies "shared network hardware". Using multiple is what you do when you want redundancy.
- snewman 16y agoHow do you know the issue was network degradation? Is this written up somewhere?
- parasubvert 16y agoThe original Reddit blog post indicates there were latency problems initially. It's not clear what caused followon problems, but the latency may have triggered a bad condition for their replication.