{section: Introduction}
-The =condor_annex= tool rents computational resources from Amazon's cloud service and joins them to an HTCondor pool for your jobs to use. These instructions document how to use =condor_annex= for CHTC jobs. Some restrictions apply:
+The =condor_annex= tool rents computational resources from Amazon's cloud service and adds them to an HTCondor pool for your jobs to use. These instructions document how to use =condor_annex= for CHTC jobs. Some restrictions apply:
*: At the moment, you can only use =condor_annex= for jobs on =submit-4.chtc.wisc.edu=.
*: You will need a log-in on =annex-cm.chtc.wisc.edu=. (Ask your research computing facilitator about this.)
*: The jobs you want to run on AWS must have =MayUseAWS= set in their ads.
*: The jobs you want to run on AWS must have =WantFlocking= set in their ads. This means your jobs will flock! If you don't know what that means, don't use =condor_annex= until you've talked to your research computing facilitator.
-*: Your jobs' requirements must allow them to run on Amazon's cloud.
+*: Your jobs' requirements must allow them to run on Amazon's cloud. When =condor_annex= acquires resources from AWS, they will by default run an EL6-like operating system, but they won't have =OpSysMajorVer= set.
-These restrictions will be covered in the following instructions.
+These restrictions will be covered in the following instructions, but if you haven't run a particular job with =condor_annex= before, you should probably add just a single resource and make sure you job actually works there before adding a useful number of resources.
In these instructions, we've included sample output after the commands. Lines you should execute start with the dollar sign (=$=) character; do not include the dollar sign (=$=) when copying the line.
