<p>It seems to be on-topic, as long as the question is well worded/asked. </p>

<p>For example, based on <a href="https://stats.stackexchange.com/search?q=is%3Aquestion+%5Blarge-data%5D+closed%3A0+algorithm">this search</a>, there are some examples which I think relate to what you are asking:</p>

<p><a href="https://stats.stackexchange.com/questions/90687/clustering-algorithm-for-my-situation">Clustering algorithm for my situation?</a></p>

<p><a href="https://stats.stackexchange.com/questions/346/what-is-a-good-algorithm-for-estimating-the-median-of-a-huge-read-once-data-set">What is a good algorithm for estimating the median of a huge read-once data set?</a></p>

<p><a href="https://stats.stackexchange.com/questions/3377/online-algorithm-for-mean-absolute-deviation-and-large-data-set">Online algorithm for mean absolute deviation and large data set</a></p>
