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Set target file size multiplier to 2, to reduce write amplification

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Andrea Cavalli 2022-05-01 15:48:08 +02:00
parent d9c2e8a5f9
commit f63b70ab9d
1 changed files with 1 additions and 1 deletions
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src/main/java/it/cavallium/dbengine/database/disk/LLLocalKeyValueDatabase.java
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@ -358,7 +358,7 @@ public class LLLocalKeyValueDatabase implements LLKeyValueDatabase {
columnFamilyOptions.setTargetFileSizeBase(64 * SizeUnit.MB); columnFamilyOptions.setTargetFileSizeBase(64 * SizeUnit.MB);
// // For each level up, the threshold is multiplied by the factor target_file_size_multiplier // // For each level up, the threshold is multiplied by the factor target_file_size_multiplier
// // (but the default value is 1, which means that the maximum sstable of each level is the same). // // (but the default value is 1, which means that the maximum sstable of each level is the same).
columnFamilyOptions.setTargetFileSizeMultiplier(1); columnFamilyOptions.setTargetFileSizeMultiplier(2);
descriptors.add(new ColumnFamilyDescriptor(column.name().getBytes(StandardCharsets.US_ASCII), columnFamilyOptions)); descriptors.add(new ColumnFamilyDescriptor(column.name().getBytes(StandardCharsets.US_ASCII), columnFamilyOptions));
} }