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Make some variables configurable for each db instance

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Summary:
Make configurable 'targetFileSize', 'targetFileSizeMultiplier',
'maxBytesForLevelBase', 'maxBytesForLevelMultiplier',
'expandedCompactionFactor', 'maxGrandParentOverlapFactor'

Test Plan: N/A

Reviewers: dhruba

Reviewed By: dhruba

Differential Revision: https://reviews.facebook.net/D3801
This commit is contained in:
heyongqiang
2012-06-22 19:30:03 -07:00
parent 2067d22038
commit 4e4b6812ff
16 changed files with 417 additions and 153 deletions
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14
util/options.cc
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@@ -22,7 +22,19 @@ Options::Options()
block_size(4096),
block_restart_interval(16),
compression(kSnappyCompression),
filter_policy(NULL) {
num_levels(7),
level0_file_num_compaction_trigger(4),
level0_slowdown_writes_trigger(8),
level0_stop_writes_trigger(12),
max_mem_compaction_level(2),
target_file_size_base(2 * 1048576),
target_file_size_multiplier(10),
max_bytes_for_level_base(10 * 1048576.0),
max_bytes_for_level_multiplier(10),
expanded_compaction_factor(25),
max_grandparent_overlap_factor(10),
filter_policy(NULL),
statistics(NULL) {
}