c 
Highly Scalable
MARCH 10, 2015
To a certain extent, such a high diversity of recommendation techniques is attributed to several implementation challenges like a sparsity of customer ratings, computational scalability, and lack of information on new items and customers. Heckerman, and C. DG12] How Companies Learn Your Secrets, C. Kleinberg, C.
Percona
JANUARY 14, 2019
However, ClickHouse is super efficient for timeseries and provides “sharding” out of the box (scalability beyond one node). To simulate text messages I have used ~3 billion of reddit comments (10 years from 2007 to 2017), downloaded from pushshift.io. So can we use it as our main datastore? group by a.w, group by a.w,
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