From 7c1f2354a5c34f0be273e16acebd699baa164266 Mon Sep 17 00:00:00 2001 From: Martial Simon Date: Mon, 23 Feb 2026 12:00:26 +0100 Subject: feat: BDA2 --- BDA/TP2.md | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 BDA/TP2.md (limited to 'BDA/TP2.md') diff --git a/BDA/TP2.md b/BDA/TP2.md new file mode 100644 index 0000000..f35f752 --- /dev/null +++ b/BDA/TP2.md @@ -0,0 +1,18 @@ +# 1. Histogramme + +mapper (ligne): + renvoie (ville, int(log(pop))) +reducer (paires): + pour chaque paire: + res[clé1] += 1 + +# 2. LastFM +## top decouvertes +mapper ligne renvoie (User, 1) +reducer1 prend [(User1, 1), (User2, 1), (User1, 1), ...] renvoie [(User1, nbUser1), (User2, nbUser2), ...] +reducer2 prend out reducer1 renvoie (key, max(Values)) + +## top ecoutes +mapper ligne renvoie (Artiste, 1) +reducer1 prend [(Artiste1, 1), (Artiste2, 1), (Artiste1, 1), ...] renvoie [(Artiste1, nbArtiste1), (Artiste2, nbArtiste2), ...] +reducer2 prend out reducer1 renvoie (key, max(Values)) \ No newline at end of file -- cgit v1.2.3