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Options::PrepareForBulkLoad() to increase parallelism of flushes

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Summary: Increasing parallelism of flushes will help bulk load throughput.

Test Plan: Compile it.

Reviewers: MarkCallaghan, yhchiang, rven, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D32685
This commit is contained in:
sdong 2015-02-02 11:09:21 -08:00
parent b04408c47b
commit 829363b449
1 changed files with 9 additions and 0 deletions
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9
util/options.cc
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@ -505,6 +505,15 @@ Options::PrepareForBulkLoad()
// increasing the total time needed for compactions. // increasing the total time needed for compactions.
num_levels = 2; num_levels = 2;
// Need to allow more write buffers to allow more parallism
// of flushes.
max_write_buffer_number = 6;
min_write_buffer_number_to_merge = 1;
// When compaction is disabled, more parallel flush threads can
// help with write throughput.
max_background_flushes = 4;
// Prevent a memtable flush to automatically promote files // Prevent a memtable flush to automatically promote files
// to L1. This is helpful so that all files that are // to L1. This is helpful so that all files that are
// input to the manual compaction are all at L0. // input to the manual compaction are all at L0.