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17261369ea
If bloom filter is not loaded, it means that an always-present filter is used, which translates into the SSTable being opened on every single read. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>
74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/*
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* Copyright (C) 2020-present ScyllaDB
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*
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include <seastar/core/sstring.hh>
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#include <seastar/core/file.hh>
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#include <seastar/core/sharded.hh>
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#include <vector>
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#include "sstables/version.hh"
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#include "sstables/component_type.hh"
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#include "sstables/shareable_components.hh"
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#include "sstables/generation_type.hh"
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#include <seastar/core/shared_ptr.hh>
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namespace sstables {
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struct entry_descriptor {
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sstring sstdir;
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sstring ks;
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sstring cf;
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generation_type generation;
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sstable_version_types version;
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sstable_format_types format;
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component_type component;
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static entry_descriptor make_descriptor(sstring sstdir, sstring fname);
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// Use the given ks and cf and don't attempt to extract it from the dir path.
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// This allows loading sstables from any path, but the filename still has to be valid.
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static entry_descriptor make_descriptor(sstring sstdir, sstring fname, sstring ks, sstring cf);
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entry_descriptor(sstring sstdir, sstring ks, sstring cf, generation_type generation,
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sstable_version_types version, sstable_format_types format,
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component_type component)
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: sstdir(sstdir), ks(ks), cf(cf), generation(generation), version(version), format(format), component(component) {}
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};
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// contains data for loading a sstable using components shared by a single shard;
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// can be moved across shards
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struct foreign_sstable_open_info {
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foreign_ptr<lw_shared_ptr<shareable_components>> components;
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std::vector<shard_id> owners;
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seastar::file_handle data;
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seastar::file_handle index;
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generation_type generation;
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sstable_version_types version;
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sstable_format_types format;
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uint64_t uncompressed_data_size;
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};
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struct sstable_open_config {
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// Load the first and last position in partition, populating the
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// `_first_partition_first_position` and `_last_partition_last_position`
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// fields respectively. Problematic sstables might fail to load. Set to
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// false if you want to disable this, to be able to read such sstables.
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// Should only be disabled for diagnostics purposes.
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// FIXME: Enable it by default once the root cause of large allocation when reading sstable in reverse is fixed.
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// Ref: https://github.com/scylladb/scylladb/issues/11642
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bool load_first_and_last_position_metadata = false;
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// If the bloom filter is not loaded, the SSTable will use an always-present
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// filter, meaning that the SSTable will be opened on every single-partition
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// read.
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bool load_bloom_filter = true;
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};
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}
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