Yashodha Hettiarachchi yashodhah

## latency_problems.md

      
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              April 1, 2025 15:23
            
              
                latency_problems.md
              
          
⚠️ Problem
💥 Explanation
✅ Recommended Actions and Considerations


Network Latency
Cross-region traffic, DNS resolution delays, or congestion can add unpredictable delays.
Deploy services closer together. Use CDNs, PrivateLink, VPC endpoints.


Tail Latency Spikes
Outlier delays (95th/99th percentile) can trigger timeouts, causing retries that amplify load — as seen during Prime Day 2018.
Measure tail latency. Set realistic timeouts. Use circuit breakers to cut retry storms.


Remote ≠ Local
Remote calls involve network hops, serialization — always


## gist:6f832d311536cf6d35649588b73b349f

      
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                when_the_network_fails_what_we_can_do.md
              
          
⚠️ Problem
💥 Explanation
✅ Recommended Actions and Considerations


Request/Response Hangs
You send a request but get no response at all. Did the request arrive, was it processed, or was the response lost along the way? Resources get stuck waiting.


## compose.yaml
services:
  postgres:
    image: postgres
    container_name: postgres
    environment:
      POSTGRES_USER: admin
      POSTGRES_PASSWORD: admin
      POSTGRES_DB: local
    ports:
      - "5432:5432"

## zeroTrust.csv
ZT Principal,Description,Examples
Verify and authenticate,"Continuously verifying identities and authentication status throughout a session, ideally on each request","AWS APIGW/ALB Authentication, AWS SSO, Cognito, IAM"
Authorization,"In addition to the authenticated identity, authorization policies should consider additional contexts, such as device health and posture, behavior patterns, resource classification, and network factors","IAM policies,Resource-based policies"
Least privilege,Granting principals the minimum level of access required to perform their actions,"IAM Roles and Policies"
Micro-segmentation,Breaking up security perimeters into small zones to maintain separate access for separate parts of the network,"VPC subnets,NACL,Security Groups"
Continuous monitoring and analytics,"Importance of visibility into user behavior, network traffic, and system activities to identify anomalies and potential security events","VPC flow logs"
Automation and orchestration,"Streamlining security processes, reduci

## start-role-session.sh
#!/usr/bin/env bash

# MIT No Attribution

# Copyright 2023 Roberto Migli

# Permission is hereby granted, free of charge, to any person obtaining a copy of this
# software and associated documentation files (the "Software"), to deal in the Software
# without restriction, including without limitation the rights to use, copy, modify,
# merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
⚠️ Problem	💥 Explanation	✅ Recommended Actions and Considerations
Network Latency	Cross-region traffic, DNS resolution delays, or congestion can add unpredictable delays.	Deploy services closer together. Use CDNs, PrivateLink, VPC endpoints.
Tail Latency Spikes	Outlier delays (95th/99th percentile) can trigger timeouts, causing retries that amplify load — as seen during Prime Day 2018.	Measure tail latency. Set realistic timeouts. Use circuit breakers to cut retry storms.
Remote ≠ Local	Remote calls involve network hops, serialization — always
	services:
	postgres:
	image: postgres
	container_name: postgres
	environment:
	POSTGRES_USER: admin
	POSTGRES_PASSWORD: admin
	POSTGRES_DB: local
	ports:
	- "5432:5432"
	ZT Principal,Description,Examples
	Verify and authenticate,"Continuously verifying identities and authentication status throughout a session, ideally on each request","AWS APIGW/ALB Authentication, AWS SSO, Cognito, IAM"
	Authorization,"In addition to the authenticated identity, authorization policies should consider additional contexts, such as device health and posture, behavior patterns, resource classification, and network factors","IAM policies,Resource-based policies"
	Least privilege,Granting principals the minimum level of access required to perform their actions,"IAM Roles and Policies"
	Micro-segmentation,Breaking up security perimeters into small zones to maintain separate access for separate parts of the network,"VPC subnets,NACL,Security Groups"
	Continuous monitoring and analytics,"Importance of visibility into user behavior, network traffic, and system activities to identify anomalies and potential security events","VPC flow logs"
	Automation and orchestration,"Streamlining security processes, reduci
	#!/usr/bin/env bash

	# MIT No Attribution

	# Copyright 2023 Roberto Migli

	# Permission is hereby granted, free of charge, to any person obtaining a copy of this
	# software and associated documentation files (the "Software"), to deal in the Software
	# without restriction, including without limitation the rights to use, copy, modify,
	# merge, publish, distribute, sublicense, and/or sell copies of the Software, and to