you can assign fixed ip to an instance using amazon' elastic ips functionalitywhich you will find on the left-hand side of the ec console this is useful if you find yourself creating and modifying instances very often there is small cost associated with this feature with eight coresyou can run eight jug processes simultaneouslyas illustrated in the following codejug execute jug execute (repeat to get jobs goinguse jug status to check whether these eight jobs are in fact running after your jobs are finished (which should now happen pretty fast)you can stop the machine and downgrade it again to micro instance to save moneythe micro instance is freewhile the extra large one costs dollars per hour (as of april --check the aws website for up-to-date informationautomating the generation of clusters with starcluster as we just learnedwe can spawn machines using the web interfacebut it quickly becomes tedious and error prone fortunatelyamazon has an api this means that we can write scripts which perform all the operations we discussed earlier automatically even betterothers have already developed tools which can be used for mechanizing and automating many of the processes you want to perform with aws group at mit developed exactly such tool called starcluster it happens to be python packageso you can install it with python toolssudo pip install starcluster you can run this from an amazon machine or from your local machine either option will work we will need to specify what our cluster will look like we do so by editing configuration file we generate template configuration file by running the following codestarcluster help thenpick the option for generating the configuration file in ~starclusterconfig once this is donewe will manually edit it