Saswata Dutta saswata-dutta

Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

Does the design expect failures to happen regularly and handle them gracefully?
Have we kept things as simple as possible?

Go to https://developer.apple.com/downloads/index.action and search for "Command line tools" and choose the one for your Mac OSX
Go to http://brew.sh/ and enter the one-liner into the Terminal, you now have brew installed (a better Mac ports)
Install transmission-daemon with
```
brew install transmission
```

Copy the startup config for launchctl with

ln -sfv /usr/local/opt/transmission/*.plist ~/Library/LaunchAgents

What the hell are environment variables?

They're just variables you set on your system that various programs/processes can read. A fairly standard example in javascript circles would be setting your NODE_ENV variable to "production" or "development", altering how node code is executed on your system (for example showing more debug messaging when in development).

With most shells there's a way to set them for the current session, and a way to set them for all sessions. The following is meant to be a guide on how to set env vars in the various shells.

Bash (The default shell on OSX)

Setting for the session:

This gist contains lists of modules available in

Python 3.10
Python 3.9
Python 3.8
Python 3.7
Python 3.6
Python 2.7

in AWS Lambda.

	Go to Bitbucket and create a new repository (its better to have an empty repo)
	git clone [email protected]:abc/myforkedrepo.git
	cd myforkedrepo

	Now add Github repo as a new remote in Bitbucket called "sync"
	git remote add sync [email protected]:def/originalrepo.git

	Verify what are the remotes currently being setup for "myforkedrepo". This following command should show "fetch" and "push" for two remotes i.e. "origin" and "sync"
	git remote -v

	import java.io.IOException;
	import java.net.URLClassLoader;
	import java.nio.file.Files;
	import java.nio.file.Paths;
	import java.nio.file.Path;

	/**
	* Example demonstrating a ClassLoader leak.
	*
	* <p>To see it in action, copy this file to a temp directory somewhere,

	import javax.persistence.EntityManager;

	import com.google.inject.AbstractModule;
	import com.google.inject.Inject;
	import com.google.inject.Singleton;
	import com.google.inject.persist.PersistService;
	import com.google.inject.persist.jpa.JpaPersistModule;

	public class DatabaseModule extends AbstractModule {

	#include <string>
	#include <functional>

	using namespace std;

	template <typename T>
	struct Maybe{
	T just;
	bool isNothing;
	};

	/**
	* Fancy ID generator that creates 20-character string identifiers with the following properties:
	*
	* 1. They're based on timestamp so that they sort after any existing ids.
	* 2. They contain 72-bits of random data after the timestamp so that IDs won't collide with other clients' IDs.
	* 3. They sort lexicographically (so the timestamp is converted to characters that will sort properly).
	* 4. They're monotonically increasing. Even if you generate more than one in the same timestamp, the
	* latter ones will sort after the former ones. We do this by using the previous random bits
	* but "incrementing" them by 1 (only in the case of a timestamp collision).
	*/

	import com.google.common.cache.CacheBuilder;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;
	import org.springframework.cache.CacheManager;
	import org.springframework.cache.annotation.CachingConfigurer;
	import org.springframework.cache.annotation.EnableCaching;
	import org.springframework.cache.guava.GuavaCache;
	import org.springframework.cache.interceptor.CacheErrorHandler;
	import org.springframework.cache.interceptor.CacheResolver;
	import org.springframework.cache.interceptor.KeyGenerator;