Add parameters WriteMixedBlobThreshold and WriteMixedBlobThresholdSSD #2910
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agalibin
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large-tests
yegorskii
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Jan 23, 2025
| const auto writeMixedBlobThreshold = GetWriteMixedBlobThreshold( | ||
| *Config, | ||
| PartitionConfig.GetStorageMediaKind(), | ||
| writeBlobThreshold); |
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какое отношение writeBlobThreshold для merged имеет к трэшолду для mixed? Кажется что никакое. На ноль можно и явно в коде проверить, так хоть понятнее будет
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as minimum request size in bytes to write to the mixed channel.
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yegorskii
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| if (requestSize < writeBlobThreshold) { | ||
| if (requestSize < (writeMixedBlobThreshold ? writeMixedBlobThreshold |
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я предлагаю организовать код так:
if (requestSize > writeBlobThreshold) {
пишем merged
} else if (requestSize > writeMixedBlobThreshold) {
пишем mixed
} else {
fresh
}
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Тогда придется дополнительно обработать writeMixedBlobThreshold == 0, именно поэтому сделал по текущей схеме.
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Добавляет параметры WriteMixedBlobThreshold и WriteMixedBlobThresholdSSD. Это размер запроса в байтах.
С размером меньше WriteMixedBlobThreshold(SSD) будут записаны в fresh канал.
Данные с размером от WriteMixedBlobThreshold(SSD) до WriteBlobThreshold(SSD) будут записаны в mixed канал.
С размером больше WriteBlobThreshold(SSD) будут записаны в merged канал.
По умолчанию выставлены 0, что рассматривается, как фича отключена и надо работать по-старому.
Это первый шаг, далее будет добавлена логика для ZeroBlocks и Compaction.