diff options
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))
\ No newline at end of file |