def StartupInstance(r, instance, dry_run=False, no_remember=False):
    """
    Starts up an instance.

    @type instance: str
    @param instance: the instance to start up
    @type dry_run: bool
    @param dry_run: whether to perform a dry run
    @type no_remember: bool
    @param no_remember: if true, will not record the state change
    @rtype: string
    @return: job id
    """

    query = {
        "dry-run": dry_run,
        "no-remember": no_remember,
    }

    return r.request("put", "/2/instances/%s/startup" % instance, query=query)