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1da9ac2363
Summary: **Context/Summary:** When db is upgrading to adopt [pr11406](https://github.com/facebook/rocksdb/pull/11406/), it's possible for RocksDB to infer a small tail size to prefetch for pre-upgrade files. Such small tail size would have caused 1 file read per index or filter partition if partitioned index or filer is used. This PR provides a UT to show this would not happen. Misc: refactor the related UTs a bit to make this new UT more readable. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11522 Test Plan: - New UT If logic of upgrade is wrong e.g, ``` --- a/table/block_based/partitioned_index_reader.cc +++ b/table/block_based/partitioned_index_reader.cc @@ -166,7 +166,8 @@ Status PartitionIndexReader::CacheDependencies( uint64_t prefetch_len = last_off - prefetch_off; std::unique_ptr<FilePrefetchBuffer> prefetch_buffer; if (tail_prefetch_buffer == nullptr || !tail_prefetch_buffer->Enabled() || - tail_prefetch_buffer->GetPrefetchOffset() > prefetch_off) { + (false && tail_prefetch_buffer->GetPrefetchOffset() > prefetch_off)) { ``` , then the UT will fail like below ``` [ RUN ] PrefetchTailTest/PrefetchTailTest.UpgradeToTailSizeInManifest/0 file/prefetch_test.cc:461: Failure Expected: (db_open_file_read.count) < (num_index_partition), actual: 38 vs 33 Received signal 11 (Segmentation fault) ``` Reviewed By: pdillinger Differential Revision: D46546707 Pulled By: hx235 fbshipit-source-id: 9897b0a975e9055963edac5451fd1cd9d6c45d0e |
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| .. | ||
| adaptive | ||
| block_based | ||
| cuckoo | ||
| plain | ||
| block_fetcher.cc | ||
| block_fetcher.h | ||
| block_fetcher_test.cc | ||
| cleanable_test.cc | ||
| compaction_merging_iterator.cc | ||
| compaction_merging_iterator.h | ||
| format.cc | ||
| format.h | ||
| get_context.cc | ||
| get_context.h | ||
| internal_iterator.h | ||
| iter_heap.h | ||
| iterator.cc | ||
| iterator_wrapper.h | ||
| merger_test.cc | ||
| merging_iterator.cc | ||
| merging_iterator.h | ||
| meta_blocks.cc | ||
| meta_blocks.h | ||
| mock_table.cc | ||
| mock_table.h | ||
| multiget_context.h | ||
| persistent_cache_helper.cc | ||
| persistent_cache_helper.h | ||
| persistent_cache_options.h | ||
| scoped_arena_iterator.h | ||
| sst_file_dumper.cc | ||
| sst_file_dumper.h | ||
| sst_file_reader.cc | ||
| sst_file_reader_test.cc | ||
| sst_file_writer.cc | ||
| sst_file_writer_collectors.h | ||
| table_builder.h | ||
| table_factory.cc | ||
| table_properties.cc | ||
| table_properties_internal.h | ||
| table_reader.h | ||
| table_reader_bench.cc | ||
| table_test.cc | ||
| two_level_iterator.cc | ||
| two_level_iterator.h | ||
| unique_id.cc | ||
| unique_id_impl.h | ||