tiernetworks

The date of the original posting would be a useful addition.

CloudFlare has an approach that may scale to the levels you are looking for; rather than storing the logs, they analyze and rollup the expected responses in realtime, and store additional detail for items that appear anomalous. John Graham-Cumming performed a talk on this topic earlier this month at dotScale:

http://www.thedotpost.com/2015/06/john-graham-cumming-i-got-...

Here is the related HN thread: https://news.ycombinator.com/item?id=9778986

-G

Graffiti is in fact already ported to Android: https://play.google.com/store/apps/details?id=com.access_com...

This was a wonderful input method -- there is no need to reinvent this particular wheel.