3 ms·

It's weird, I see actually most of my issues coming from instances located in `eu-west-1a`, whereas `eu-west-1b` and `eu-west-1c` look fine.

danielhunt 10y ago
Interesting difference in experience there Complicated networks are complicated, I suppose
aidos 10y ago
I recall reading somewhere many years ago that AWS randomise a, b, c etc per account. Otherwise people have a tendency to pick A and be done with it.
- danielhunt 10y ago
  That's true - they loadbalance instance creation unless you specifically ask for an instance in a zone That doesn't apply here though. Instances that are already up are experiencing DNS resolution issues because the Amazon-provided DNS service (which is distinct from Route53) is failing
  - aidos 10y ago
    I don't think I explained that very clearly. What you see as zone A is not what I see as zone A (maybe). When you sign up for an account, AWS assigns your zone A to one of the 3 available zones: zone X (real) : your A (virtual) : my C (virtual) zone Y (real) : your B (virtual) : my B (virtual) zone Z (real) : your C (virtual) : my A (virtual) That's why people see different outage characteristics between the zones. Edit: one of the few articles (other than HN comments) that explains it https://alestic.com/2009/07/ec2-availability-zones/ https://alestic.com/2009/07/ec2-availability-zones/
    - danielhunt 10y ago
      I've been using AWS for years and this is the first I've ever heard of this. All I can say is "WHAAAAAAT?!" You've made me question my reality. Take an upvote for that alone.
      - aidos 10y ago
        I'm glad I could make what is otherwise a bad time to be looking after servers a little more enjoyable. I myself was in the middle of a release when all this happened. "I'll just release this thing" I said, "will only take 20 minutes" I said....
      - misframer 10y ago
        It's in the documentation [0]. An Availability Zone is represented by a region code followed by a letter identifier; for example, us-east-1a. To ensure that resources are distributed across the Availability Zones for a region, we independently map Availability Zones to identifiers for each account. For example, your Availability Zone us-east-1a might not be the same location as us-east-1a for another account. There's no way for you to coordinate Availability Zones between accounts. [0] http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html#concepts-regions-availability-zones http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-reg...
danielhunt 10y ago
Seeing an increase in errors in `1a` and `1c` now myself too

danielhunt 10y ago

Interesting difference in experience there Complicated networks are complicated, I suppose

aidos 10y ago

I recall reading somewhere many years ago that AWS randomise a, b, c etc per account. Otherwise people have a tendency to pick A and be done with it.

danielhunt 10y ago
That's true - they loadbalance instance creation unless you specifically ask for an instance in a zone That doesn't apply here though. Instances that are already up are experiencing DNS resolution issues because the Amazon-provided DNS service (which is distinct from Route53) is failing
- aidos 10y ago
  I don't think I explained that very clearly. What you see as zone A is not what I see as zone A (maybe). When you sign up for an account, AWS assigns your zone A to one of the 3 available zones: zone X (real) : your A (virtual) : my C (virtual) zone Y (real) : your B (virtual) : my B (virtual) zone Z (real) : your C (virtual) : my A (virtual) That's why people see different outage characteristics between the zones. Edit: one of the few articles (other than HN comments) that explains it https://alestic.com/2009/07/ec2-availability-zones/ https://alestic.com/2009/07/ec2-availability-zones/
  - danielhunt 10y ago
    I've been using AWS for years and this is the first I've ever heard of this. All I can say is "WHAAAAAAT?!" You've made me question my reality. Take an upvote for that alone.
    - aidos 10y ago
      I'm glad I could make what is otherwise a bad time to be looking after servers a little more enjoyable. I myself was in the middle of a release when all this happened. "I'll just release this thing" I said, "will only take 20 minutes" I said....
    - misframer 10y ago
      It's in the documentation [0]. An Availability Zone is represented by a region code followed by a letter identifier; for example, us-east-1a. To ensure that resources are distributed across the Availability Zones for a region, we independently map Availability Zones to identifiers for each account. For example, your Availability Zone us-east-1a might not be the same location as us-east-1a for another account. There's no way for you to coordinate Availability Zones between accounts. [0] http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html#concepts-regions-availability-zones http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-reg...

danielhunt 10y ago

Seeing an increase in errors in `1a` and `1c` now myself too