Ask HN: Processing multiple GBs of data on local machine

I recall a few blog posts on this, but I'm struggling to find them now that I need them.

I have about 100GB of Log4j formatted logs to process to find a particular needle in the haystack, and am looking for a decent way to process those files locally without breaking out Spark in EMR etc.

I recall a few blog posts on this subject, but my search fu is letting me down. Is this ringing bells for anyone?

Thanks in advance :)