The computer driven markets for instruments like stocks and exchange traded stock options, have transformed finance and the flow of capital. These markets are enabled by order matching engines (and the infrastructure that supports this software). Before computer trading networks and matching engines, stocks where traded on cavernous exchange floors and transaction costs where high. When electronic trading fully matured, floor traders were a fading anachronism and transaction costs had been reduced to pennies a share in many cases. Electronic trading could not exist without advanced network infrastructure, but without the software matching engines no shares would change hands. The computer trading networks, the matching engine software has also created a concentrated nexus of potential failure. Failures in these systems have increased as the frequency and volume on the electronic networks has increased. The position of order matching engines in the trading infrastructure makes these systems o
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terraform { | |
required_providers { | |
digitalocean = { | |
source = "digitalocean/digitalocean" | |
} | |
} | |
} | |
provider "digitalocean" { | |
} |
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using System; | |
using System.Collections.Concurrent; | |
using System.Linq; | |
using System.Net; | |
using System.Threading.Tasks; | |
using Microsoft.AspNetCore; | |
using Microsoft.AspNetCore.Builder; | |
using Microsoft.AspNetCore.Hosting; | |
using Microsoft.AspNetCore.Mvc; | |
using Microsoft.Extensions.Caching.Memory; |
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(ns demo.sample | |
(:require [clojure.core.async :as async]) | |
(:import (java.net InetAddress DatagramPacket DatagramSocket MulticastSocket NetworkInterface InetSocketAddress))) | |
(defonce udp-server (atom nil)) | |
(defonce udp-client (atom nil)) | |
(def port 5555) | |
(comment defn server-host [] (InetAddress/getLocalHost)) |
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server { | |
listen 80; | |
server_name localhost; | |
location /oauth2/ { | |
proxy_pass http://oauth-proxy:4180; | |
proxy_set_header Host $host; | |
proxy_set_header X-Real-IP $remote_addr; | |
proxy_set_header X-Scheme $scheme; | |
proxy_set_header X-Auth-Request-Redirect $request_uri; |
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### KERNEL TUNING ### | |
# Increase size of file handles and inode cache | |
fs.file-max = 2097152 | |
# Do less swapping | |
vm.swappiness = 10 | |
vm.dirty_ratio = 60 | |
vm.dirty_background_ratio = 2 |
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#!groovy | |
import groovy.json.JsonOutput | |
import groovy.json.JsonSlurper | |
def label = "mypod-${UUID.randomUUID().toString()}" | |
podTemplate(label: label, yaml: """ | |
spec: | |
containers: | |
- name: mvn | |
image: maven:3.3.9-jdk-8 |
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# In order for gpg to find gpg-agent, gpg-agent must be running, and there must be an env | |
# variable pointing GPG to the gpg-agent socket. This little script, which must be sourced | |
# in your shell's init script (ie, .bash_profile, .zshrc, whatever), will either start | |
# gpg-agent or set up the GPG_AGENT_INFO variable if it's already running. | |
# Add the following to your shell init to set up gpg-agent automatically for every shell | |
if [ -f ~/.gnupg/.gpg-agent-info ] && [ -n "$(pgrep gpg-agent)" ]; then | |
source ~/.gnupg/.gpg-agent-info | |
export GPG_AGENT_INFO | |
else |
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sudo xfsdump -L KW12 -M FullBackup -J - / |lzop > /media/oli/465GB/Backup/Oli/Vostro/Linux-xfsdump-2016-03-26.lzo | |
## Explanation: | |
# sudo xfsdump | |
# -> start the xfsdump programm with root privileges | |
# -L KW12 | |
# -> gives the Backup the label KW12 | |
# -M FullBackup |
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