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Allow for caching of compaction scores

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Potentially reduce the overheads of scoring each file on every run.

The change also alters the default thresholds for compaction to favour longer runs (which will tend towards greater storage efficiency).
This commit is contained in:
Martin Sumner 2020-11-27 02:35:27 +00:00
parent e3bcd7eaec
commit b4c79caf7a
9 changed files with 153 additions and 17 deletions
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2
include/leveled.hrl
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@ -69,6 +69,7 @@
max_run_length,
singlefile_compactionperc :: float()|undefined,
maxrunlength_compactionperc :: float()|undefined,
score_onein = 1 :: pos_integer(),
snaptimeout_long :: pos_integer() | undefined}).
-record(penciller_options,
@ -94,4 +95,5 @@
compression_method = native :: lz4|native,
singlefile_compactionperc :: float()|undefined,
maxrunlength_compactionperc :: float()|undefined,
score_onein = 1 :: pos_integer(),
reload_strategy = [] :: list()}).