3c254dd49d
Some SSTable sets are considered to be off-strategy: they are in a shape that is at best not optimal and at worst adversarial to the current compaction strategy. This patch introduces the compaction strategy-specific method get_reshaping_job(). Given an SSTable set, it returns one compaction that can be done to bring the table closer to being in-strategy. The caller can then call this repeatedly until the table is fully in-strategy. As an example of how this is supposed to work, consider TWCS: some SSTables will belong to a single window -> in which case they are already in-strategy and don't need to be compacted, and others span multiple windows in which case they are considered off-strategy and have to be compacted. Signed-off-by: Glauber Costa <glauber@scylladb.com>
37 lines
927 B
C++
37 lines
927 B
C++
/*
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* Copyright (C) 2020 ScyllaDB
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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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namespace sstables {
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enum class compaction_strategy_type {
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null,
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major,
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size_tiered,
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leveled,
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date_tiered,
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time_window,
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};
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enum class reshape_mode { strict, relaxed };
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}
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