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42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
#pragma once
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#include <DB/Storages/StorageMergeTree.h>
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#include <iomanip>
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namespace DB
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{
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class MergeTreeBlockOutputStream : public IBlockOutputStream
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{
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public:
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MergeTreeBlockOutputStream(StorageMergeTree & storage_)
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: storage(storage_) {}
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void write(const Block & block)
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{
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auto part_blocks = storage.writer.splitBlockIntoParts(block);
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for (auto & current_block : part_blocks)
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{
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size_t parts_count = storage.data.getDataPartsCount();
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if (parts_count > storage.data.settings.parts_to_delay_insert)
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{
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double delay = std::pow(storage.data.settings.insert_delay_step, parts_count - storage.data.settings.parts_to_delay_insert);
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delay /= 1000;
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delay = std::min(delay, 5 * 60.); /// Ограничим задержку 5 минутами.
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LOG_INFO(storage.log, "Delaying inserting block by "
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<< std::fixed << std::setprecision(4) << delay << "s because there are " << parts_count << " parts");
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std::this_thread::sleep_for(std::chrono::duration<double>(delay));
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}
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UInt64 temp_index = storage.increment.get();
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MergeTreeData::MutableDataPartPtr part = storage.writer.writeTempPart(current_block, temp_index);
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storage.data.renameTempPartAndAdd(part, &storage.increment);
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}
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}
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private:
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StorageMergeTree & storage;
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};
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}
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