LBRYCommunity/lbry-sdk
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only do trending calculations near the tip of the chain

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Alex Grintsvayg 2019-10-11 10:51:36 -04:00
parent eb8a88dbd6
commit 065215cc27
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GPG key ID: AEB3F089F86A22B5
2 changed files with 13 additions and 9 deletions
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12
lbry/lbry/wallet/server/db/trending.py
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@ -1,7 +1,11 @@
from math import sqrt
TRENDING_WINDOW = 134 # number of blocks in ~6hr period (21600 seconds / 161 seconds per block)
TRENDING_DATA_POINTS = 7 # WINDOW * DATA_POINTS = ~1 week worth of trending data
# TRENDING_WINDOW is the number of blocks in ~6hr period (21600 seconds / 161 seconds per block)
TRENDING_WINDOW = 134
# TRENDING_DATA_POINTS says how many samples to use for the trending algorithm
# i.e. only consider claims from the most recent (TRENDING_WINDOW * TRENDING_DATA_POINTS) blocks
TRENDING_DATA_POINTS = 7
CREATE_TREND_TABLE = """
create table if not exists trend (
@ -47,9 +51,9 @@ def register_trending_functions(connection):
connection.create_aggregate("zscore", 1, ZScore)
def calculate_trending(db, height, is_first_sync, final_height):
def calculate_trending(db, height, final_height):
# don't start tracking until we're at the end of initial sync
if is_first_sync and height < (final_height - (TRENDING_WINDOW*TRENDING_DATA_POINTS)):
if height < (final_height - (TRENDING_WINDOW * TRENDING_DATA_POINTS)):
return
if height % TRENDING_WINDOW != 0:

2
lbry/lbry/wallet/server/db/writer.py
View file

@ -699,7 +699,7 @@ class SQLDB:
update_claims, delete_claim_hashes, affected_channels, forward_timer=True)
r(self.insert_supports, insert_supports)
r(self.update_claimtrie, height, recalculate_claim_hashes, deleted_claim_names, forward_timer=True)
r(calculate_trending, self.db, height, self.main.first_sync, daemon_height)
r(calculate_trending, self.db, height, daemon_height)
class LBRYDB(DB):