(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
public class ExodusWriter { | |
private JdbcTemplate jdbcTemplate; | |
private TransactionTemplate transactionTemplate; | |
public ExodusWriter(DataSource dataSource) { | |
DataSourceTransactionManager transactionManager = new DataSourceTransactionManager(dataSource); | |
jdbcTemplate = new JdbcTemplate(transactionManager.getDataSource()); | |
transactionTemplate = new TransactionTemplate(transactionManager); | |
} |
/** | |
* Luhn algorithm in JavaScript: validate credit card number supplied as string of numbers | |
* @author ShirtlessKirk. Copyright (c) 2012. | |
* @license WTFPL (http://www.wtfpl.net/txt/copying) | |
*/ | |
var luhnChk = (function (arr) { | |
return function (ccNum) { | |
var | |
len = ccNum.length, | |
bit = 1, |
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 |
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
apply from: rootProject.file('gradle/install-git-hooks.gradle') |
#!/bin/bash | |
# file: ttfb.sh | |
# curl command to check the time to first byte | |
# ** usage ** | |
# 1. ./ttfb.sh "https://google.com" | |
# 2. seq 10 | xargs -Iz ./ttfb.sh "https://google.com" | |
curl -o /dev/null \ | |
-H 'Cache-Control: no-cache' \ | |
-s \ |
Kong, Traefik, Caddy, Linkerd, Fabio, Vulcand, and Netflix Zuul seem to be the most common in microservice proxy/gateway solutions. Kubernetes Ingress is often a simple Ngnix, which is difficult to separate the popularity from other things.
This is just a picture of this link from March 2, 2019
Originally, I had included some other solution
The AWS EKS team works extremely hard. We appreciate all of their effort.
But the aws-vpc-cni
requires fine-tuning of complex settings, and:
WARM_ENI_TARGET
, WARM_IP_TARGET
, WARM_PREFIX_TARGET
, etc...ENABLE_PREFIX_DELEGATION
+ branching can lead to a lot of wasted IPs