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Summary of the Amazon S3 Service Disruption in the Northern Virginia (US-EAST-1) Region
Beschreibung warum es die s3 downtime gab.
0. Rechnungserstellung zu langsam
1.Menschlicher Fehler. Zuviele Einheiten auf einmal heruntergefahren.
2.S3 Indexsystem funktionierte nicht mehr
3.S3 funktionierte nicht mehr
4. Systeme die von S3 abhängig sind funktionierten nicht mehr (ec2, lamda,..)

Die grossen Systeme wurden sehr lange nicht komplett neu gestartet. Keine Erfahrungswerte was es da für Probleme gibt -> verlängerte die Downtime
-> Blastradius zu gross
-> zu wenige Sicherheit Features an kritischen Stellen
aws  amazon  outage  s3  post-mortem  arbeit  via:popular 
march 2017 by rauschen
S3 2017-02-28 outage post-mortem
The Amazon Simple Storage Service (S3) team was debugging an issue causing the S3 billing system to progress more slowly than expected. At 9:37AM PST, an authorized S3 team member using an established playbook executed a command which was intended to remove a small number of servers for one of the S3 subsystems that is used by the S3 billing process. Unfortunately, one of the inputs to the command was entered incorrectly and a larger set of servers was removed than intended. The servers that were inadvertently removed supported two other S3 subsystems.  One of these subsystems, the index subsystem, manages the metadata and location information of all S3 objects in the region. This subsystem is necessary to serve all GET, LIST, PUT, and DELETE requests. The second subsystem, the placement subsystem, manages allocation of new storage and requires the index subsystem to be functioning properly to correctly operate. The placement subsystem is used during PUT requests to allocate storage for new objects. Removing a significant portion of the capacity caused each of these systems to require a full restart. While these subsystems were being restarted, S3 was unable to service requests. Other AWS services in the US-EAST-1 Region that rely on S3 for storage, including the S3 console, Amazon Elastic Compute Cloud (EC2) new instance launches, Amazon Elastic Block Store (EBS) volumes (when data was needed from a S3 snapshot), and AWS Lambda were also impacted while the S3 APIs were unavailable.  
s3  postmortem  aws  post-mortem  outages  cms  ops 
march 2017 by jm

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