Hi, I'm the author of the post. My intent in using Memcache as the mechanism for this type of indexing was more an attempt to relate the subject with something

Hi, I'm the author of the post. My intent in using Memcache as the mechanism for this type of indexing was more an attempt to relate the subject with something that most developers are at least somewhat familiar with. I explicitly address the weaknesses of Memcache in the section titled "Weaknesses". I also recommend some work-arounds to lessen the effect of Memcache's limitations. In the "Wrap-Up" section, I even go so far as to say that Memcache is really only one example of a distributed hash-table and that there are alternatives. Rolling your own is another option, and both of solutions are probably better suited to the indexing problem than Memcache. Again, I was afraid that the subject would be lost on most people if there wasn't at least some relation made between the concept and something that concretely exists. Try to look at it as an exercise in thinking "outside the box", using the best example I could think of. Thanks for the comments, good and bad. These critiques really do help.