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01e2d33565
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/11906 The patch adds stress test coverage for the wide-column aware `FullMergeV3` API by implementing a new `DBStressWideMergeOperator`. This operator is similar to `PutOperator` / `PutOperatorV2` in the sense that its result is based on the last merge operand; however, the merge result can be either a plain value or a wide-column entity, depending on the value base encoded into the operand and the value of the `use_put_entity_one_in` stress test parameter. Following the same rule for merge results that we do for writes ensures that the queries issued by the validation logic receive the expected results. The new operator is used instead of `PutOperatorV2` whenever `use_put_entity_one_in` is positive. Note that the patch also makes it possible to set `use_put_entity_one_in` and `use_merge` (but not `use_full_merge_v1`) at the same time, giving `use_put_entity_one_in` precedence, so the stress test will use `PutEntity` for writes passing the `use_put_entity_one_in` check described above and `Merge` for any other writes. Reviewed By: jaykorean Differential Revision: D49760024 fbshipit-source-id: 3893602c3e7935381b484f4f5026f1983e3a04a9
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
// Copyright (c) Meta Platforms, Inc. and affiliates.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#ifdef GFLAGS
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#include "db_stress_tool/db_stress_wide_merge_operator.h"
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#include "db_stress_tool/db_stress_common.h"
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namespace ROCKSDB_NAMESPACE {
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bool DBStressWideMergeOperator::FullMergeV3(
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const MergeOperationInputV3& merge_in,
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MergeOperationOutputV3* merge_out) const {
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assert(!merge_in.operand_list.empty());
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assert(merge_out);
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const Slice& latest = merge_in.operand_list.back();
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if (latest.size() < sizeof(uint32_t)) {
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return false;
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}
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const uint32_t value_base = GetValueBase(latest);
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if (FLAGS_use_put_entity_one_in == 0 ||
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(value_base % FLAGS_use_put_entity_one_in) != 0) {
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merge_out->new_value = latest;
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return true;
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}
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const auto columns = GenerateWideColumns(value_base, latest);
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merge_out->new_value = MergeOperationOutputV3::NewColumns();
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auto& new_columns =
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std::get<MergeOperationOutputV3::NewColumns>(merge_out->new_value);
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new_columns.reserve(columns.size());
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for (const auto& column : columns) {
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new_columns.emplace_back(column.name().ToString(),
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column.value().ToString());
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}
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return true;
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}
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} // namespace ROCKSDB_NAMESPACE
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#endif // GFLAGS
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