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| author | Martial Simon <msimon_fr@hotmail.com> | 2026-02-23 12:00:26 +0100 |
|---|---|---|
| committer | Martial Simon <msimon_fr@hotmail.com> | 2026-02-23 12:00:26 +0100 |
| commit | 7c1f2354a5c34f0be273e16acebd699baa164266 (patch) | |
| tree | 95233ea46f109c7658cded1a5526ec2a4b713cb3 /BDA/TP2.md | |
| parent | 3b90f78fbbce0ccca74de1b39d2a1a8a9f423a58 (diff) | |
feat: BDA2
Diffstat (limited to 'BDA/TP2.md')
| -rw-r--r-- | BDA/TP2.md | 18 |
1 files changed, 18 insertions, 0 deletions
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))
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