Шпаргалка с командами Docker
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#!/usr/bin/env bash | |
# find filename on https://go.dev/dl/ | |
GO_FILE_NAME="go1.19.3.darwin-arm64.tar.gz" | |
# usage: | |
# chmod u+x install_go.sh | |
# sudo ./install_go.sh | |
mkdir /tmp/downloads |
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# Credit http://stackoverflow.com/a/2514279 | |
for branch in `git branch -r | grep -v HEAD`;do echo -e `git show --format="%ci %cr" $branch | head -n 1` \\t$branch; done | sort -r |
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# This code is licensed under the terms of the MIT license https://opensource.org/license/mit | |
# Copyright (c) 2021 Marat Reymers | |
## Golden config for golangci-lint v1.55.2 | |
# | |
# This is the best config for golangci-lint based on my experience and opinion. | |
# It is very strict, but not extremely strict. | |
# Feel free to adapt and change it for your needs. | |
run: |
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{ | |
"channel": { | |
"id": 38629, | |
"name": "Traffic Monitor", | |
"description": "Traffic Monitor showing density of cars detected", | |
"latitude": "42.28", | |
"longitude": "-71.35", | |
"field1": "Density of Westbound Cars", | |
"field2": "Density of Eastbound Cars", | |
"created_at": "2015-05-19T20:1Z", |
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package main | |
import ( | |
"fmt" | |
"sync" | |
"time" | |
) | |
func main() { | |
wg := sync.WaitGroup{} |
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# WARNING: This docker-compose.yml is only for testing purpose. | |
# Parameters: | |
# - name: CONFLUENT_PLATFORM_VERSION | |
# default: 7.2.1 | |
# reference: https://hub.docker.com/u/confluentinc/ | |
# Ports: | |
# - description: Major ports are exposed to host computer | |
# - zookeeper: 2181 | |
# kafka1: 9091 | |
# kafka2: 9092 |
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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
#System Design Cheatsheet
Picking the right architecture = Picking the right battles + Managing trade-offs
##Basic Steps
- 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?