quad

What is this architecture called?

I rarely see the classical three-tier architecture in the wild; I frequently see a different architecture.

I don't know this architecture's name. Do you?

The Three-Tier Architecture

The "three-tier architecture" has been the reference pattern for Internet services:

axdotl

Perform Keycloak Export and Import on Kubernetes

• Setup Keycloak in non-HA mode (replica 1)
• Disable UserFederation
• You might have to increase the resource limits to avoid that pod beeing killed by memory or CPU limits

See Keycloak Documentation for more details.

Export

marfenij

kubectl get po --all-namespaces | grep Evicted | awk '{print $2, "--namespace", $1}' | xargs kubectl delete pod

vlinevych

#!/usr/bin/env python3
"""
Import/Export tool for Consul Key-Value storage.

If your server has ACL enabled,
be sure to export CONSUL_HTTP_TOKEN env variable or use -t to provide a token

Usage:

  Export KV storage decoding values

e0ipso

Status

This extension was developed as part of the jsonapi module for Drupal.

Introduction

The JSON API specification is agnostic about how a server implements filtering strategies. In fact, the spec says:

Note: JSON API is agnostic about the strategies supported by a server. The filter query parameter can be used as the basis for any number of filtering strategies.

beeman

# Stop all containers
docker stop `docker ps -qa`

# Remove all containers
docker rm `docker ps -qa`

# Remove all images
docker rmi -f `docker images -qa `

# Remove all volumes

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

rgreenjr

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'