Didn't realize it was you both times. I recognized the posts. The packing one was only last week, and this DNS Legend one, while older, was written by someone

Didn't realize it was you both times. I recognized the posts. The packing one was only last week, and this DNS Legend one, while older, was written by someone I know. When that happens, I go to the search link at the bottom of HN, and look for the title, or use the key words. That finds the hits. I then check to see if there were many comments. The FAQ says "If a story has had significant attention in the last year or so, we kill reposts as duplicates. If not, a small number of reposts is ok." Duplicate posts are hard to detect. The packing one from last week has a tracer on it, as "?src=hn", so the URL is different than the one you submitted. Also, due to the vagaries of voting, sometimes the moderators think a post didn't get the notice it should have, and don't weed out duplicates even if there haven't (yet) been any comments. There's also a problem if a dozen sources report the same topic, like when Citizenfour recently won the Academy Award.