Derek Fong fongd

"Medium traffic" = able to handle around 50 concurrent users on average.

If you want to handle 100+ concurrent users with the same modest hardware see the Varnish section below.

VPS

4096 MB memory
125GB SSD
4 CPUs
Cpanel

Setting up a private ethereum blockchain for development and pointing your wallet at it

Ethereum tutorials all advise downloading the Mist wallet and beginning dev. The only problem is that the testnet and real blockchain are huge and take hours to download. What follows is a recipe for quickly setting up a small blockchain and pre-mining it with some test ethereum

The following is done in Linux but will work in MacOS and should have equivalent command line options in Windows. Where I don't give detailed instructions, it's because a quick google search will fill in the blanks.

Install geth https://github.com/ethereum/go-ethereum/wiki/geth

install Mist https://github.com/ethereum/mist/releases


	do {
	let jsonDict = try NSJSONSerialization.JSONObjectWithData(fileContents!, options: []) as! NSDictionary
	if let features = jsonDict["features"] as? [Dictionary<String, AnyObject>] {


	// try this
	var oneFeature = features[0]["geometry"]!["coordinates"]!![0][3]