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35b75e9b67
Adapt our compaction code to start writing a new sstable if the one being written reached its maximum size. Leveled strategy works with that concept. If a strategy other than leveled is being used, everything will work as before. Signed-off-by: Raphael S. Carvalho <raphaelsc@cloudius-systems.com>
64 lines
2.5 KiB
C++
64 lines
2.5 KiB
C++
/*
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* Copyright (C) 2015 Cloudius Systems, Ltd.
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*
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "sstables.hh"
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#include <functional>
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namespace sstables {
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struct compaction_descriptor {
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// List of sstables to be compacted.
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std::vector<sstables::shared_sstable> sstables;
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// Level of sstable(s) created by compaction procedure.
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int level = 0;
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// Threshold size for sstable(s) to be created.
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uint64_t max_sstable_bytes = std::numeric_limits<uint64_t>::max();
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compaction_descriptor() = default;
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compaction_descriptor(std::vector<sstables::shared_sstable> sstables, int level, long max_sstable_bytes)
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: sstables(std::move(sstables))
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, level(level)
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, max_sstable_bytes(max_sstable_bytes) {}
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compaction_descriptor(std::vector<sstables::shared_sstable> sstables)
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: sstables(std::move(sstables)) {}
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};
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// Compact a list of N sstables into M sstables.
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// creator is used to get a sstable object for a new sstable that will be written.
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// max_sstable_size is a relaxed limit size for a sstable to be generated.
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// Example: It's okay for the size of a new sstable to go beyond max_sstable_size
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// when writing its last partition.
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// sstable_level will be level of the sstable(s) to be created by this function.
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future<> compact_sstables(std::vector<shared_sstable> sstables,
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column_family& cf, std::function<shared_sstable()> creator,
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uint64_t max_sstable_size, uint32_t sstable_level);
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// Return the most interesting bucket applying the size-tiered strategy.
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// NOTE: currently used for purposes of testing. May also be used by leveled compaction strategy.
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std::vector<sstables::shared_sstable>
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size_tiered_most_interesting_bucket(lw_shared_ptr<sstable_list> candidates);
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}
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