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I have 1 million queries on disk to sort, my local memory/cache can store
up to 1 thousand queries, how can I perform sort?
This is a google interview question. Can someone help me find the answer?
You load 1000 queries in memory and sort them using quicksort, writing them to a file. In the end you’ll have 1000 such files.
You then go on to merging the files using, you guessed it, mergesort.
That’s how I’d do it. By no means the most optimal solution.