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CloudWatch Logs – Multi-Account & Multi-Region Aggregation

  • Enables centralized log collection from different AWS accounts and regions.
  • Achieved by configuring Subscription Filters in each source account/region.
  • Forward logs in near real-time to a centralized destination, such as:
    • Amazon Kinesis Data Streams
    • Amazon Kinesis Data Firehose
    • Amazon S3 (via Firehose)
  • Common in security monitoring and centralized analytics setups.
Example:
  • Account A – Region 1, Account B – Region 2, Account B – Region 3
  • Each forwards logs via subscription filters to a single aggregation pipeline in a logging account.