Netflix Cloud Native Architecture
•Services must be stateless--all data / state replication needs to handled in data tier.• They must access any resource locally in-Region. This includes resources like S3, SQS, etc. This means several applications that are publishing data into an S3 bucket, now have to publish the same data into multiple regional S3 buckets.
• there should not be any cross-regional calls on user's call path. Data replication should be asynchronous.
https://medium.com/netflix-techblog/active-active-for-multi-regional-resiliency-c47719f6685b
個人的にこのへんは面白いです。
multi region writes
evcache cross region replication
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