| require(quantmod) | |
| do_chart <- function(symbol) { | |
| quote <- getQuote(symbol) | |
| quote$Close <- quote$Last | |
| xts(OHLCV(quote), quote[,"Trade Time"], | |
| pct_change = quote[,"% Change"]) | |
| } | |
| filename <- "intraday-sp500.rds" |
Launch your EC2 EBS instance with two SSDs on the second and third slots (after the root EBS volume), with this in your userdata:
#!/usr/bin/env bash
umount /dev/xvdb
umount /dev/xvdc
apt-get install mdadm -y
mkdir /u01
cat > /etc/init/mount-ephermal-ssd.conf <
| #!/bin/bash | |
| # | |
| # this script will attempt to detect any ephemeral drives on an EC2 node and create a RAID-0 stripe | |
| # mounted at /mnt. It should be run early on the first boot of the system. | |
| # | |
| # Beware, This script is NOT fully idempotent. | |
| # | |
| METADATA_URL_BASE="http://169.254.169.254/2012-01-12" |