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A quick 15-day jaunt has brought us to Mexico 's Yucatan Peninsula , and after a week of hard travel involving cabanas with no running water and obscure Mayan jungle ruins , we aging backpackers are looking forward to a little RandR on the beach at the funky resort town of Tulum . As we address cost increases , we will continue our budget reduction , cost savings and reallocation efforts . In contrast to the earlier calculations , we find that with an acceptable stale hit rate of less than 5 % , both Alex and TTL demand less bandwidth than the invalidation protocol for nearly all parameter settings and that Alex and TTL offer similar savings in bandwidth . We came into Saudi Arabia and instead of leaving when the job was finished , we took settled in like an unwelcome leeching cousin . Since this view of the timeline is from the Commons Area , we can see that the brainstorming session started out with people arriving and " hanging out " ( i.e ., not necessarily saying very much ) in the Commons Area ( as shown by the multiple colored lines ) , followed by a lot of interaction in topics that the group created for more focused brainstorming by subgroups ( as shown by the colored lines changing to gray as people switch to the focused topics ) .