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rocksdb/table/block_based
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akankshamahajan 5cb2d09d47 Refactor FilePrefetchBuffer code (#12097) 
Summary:
Summary - Refactor FilePrefetchBuffer code
- Implementation:
FilePrefetchBuffer maintains a deque of free buffers (free_bufs_) of size num_buffers_ and buffers (bufs_) which contains the prefetched data. Whenever a buffer is consumed or is outdated (w.r.t. to requested offset), that buffer is cleared and returned to free_bufs_.

 If a buffer is available in free_bufs_, it's moved to bufs_ and is sent for prefetching. num_buffers_ defines how many buffers are maintained that contains prefetched data.
If num_buffers_ == 1, it's a sequential read flow. Read API will be called on that one buffer whenever the data is requested and is not in the buffer.
If num_buffers_ > 1, then the data is prefetched asynchronosuly in the buffers whenever the data is consumed from the buffers and that buffer is freed.
If num_buffers > 1, then requested data can be overlapping between 2 buffers. To return the continuous buffer overlap_bufs_ is used. The requested data is copied from 2 buffers to the overlap_bufs_ and overlap_bufs_ is returned to
the caller.

- Merged Sync and Async code flow into one in FilePrefetchBuffer.

Test Plan -
- Crash test passed
- Unit tests
- Pending - Benchmarks

Pull Request resolved: https://github.com/facebook/rocksdb/pull/12097

Reviewed By: ajkr

Differential Revision: D51759552

Pulled By: akankshamahajan15

fbshipit-source-id: 69a352945affac2ed22be96048d55863e0168ad5
 		2024-01-05 09:29:01 -08:00
..
binary_search_index_reader.cc Add support to strip / pad timestamp when creating / reading a block based table (#11495) 2023-06-01 11:10:03 -07:00
binary_search_index_reader.h Extend Get/MultiGet deadline support to table open (#6982) 2020-06-29 14:53:17 -07:00
block.cc internal_repo_rocksdb (-8794174668376270091) (#12114) 2023-12-01 11:10:30 -08:00
block.h Add support to strip / pad timestamp when writing / reading a block (#11472) 2023-05-25 15:41:32 -07:00
block_based_table_builder.cc Group SST write in flush, compaction and db open with new stats (#11910) 2023-12-29 15:29:23 -08:00
block_based_table_builder.h Record and use the tail size to prefetch table tail (#11406) 2023-05-08 13:14:28 -07:00
block_based_table_factory.cc internal_repo_rocksdb (-8794174668376270091) (#12114) 2023-12-01 11:10:30 -08:00
block_based_table_factory.h Record and use the tail size to prefetch table tail (#11406) 2023-05-08 13:14:28 -07:00
block_based_table_iterator.cc Refactor FilePrefetchBuffer code (#12097) 2024-01-05 09:29:01 -08:00
block_based_table_iterator.h Make auto_readahead_size default true (#12080) 2023-12-14 11:25:51 -08:00
block_based_table_reader.cc Refactor FilePrefetchBuffer code (#12097) 2024-01-05 09:29:01 -08:00
block_based_table_reader.h Refactor FilePrefetchBuffer code (#12097) 2024-01-05 09:29:01 -08:00
block_based_table_reader_impl.h Fix various failures in auto_readahead_size (#11884) 2023-10-02 17:47:24 -07:00
block_based_table_reader_sync_and_async.h Support compressed and local flash secondary cache stacking (#11812) 2023-09-21 20:30:53 -07:00
block_based_table_reader_test.cc Fix and defend against FilePrefetchBuffer combined with mmap reads (#12206) 2024-01-04 18:39:05 -08:00
block_builder.cc internal_repo_rocksdb (-8794174668376270091) (#12114) 2023-12-01 11:10:30 -08:00
block_builder.h Logically strip timestamp during flush (#11557) 2023-06-29 15:50:50 -07:00
block_cache.cc Support compressed and local flash secondary cache stacking (#11812) 2023-09-21 20:30:53 -07:00
block_cache.h Support compressed and local flash secondary cache stacking (#11812) 2023-09-21 20:30:53 -07:00
block_prefetcher.cc Refactor FilePrefetchBuffer code (#12097) 2024-01-05 09:29:01 -08:00
block_prefetcher.h Refactor FilePrefetchBuffer code (#12097) 2024-01-05 09:29:01 -08:00
block_prefix_index.cc Fix bug with kHashSearch and changing prefix_extractor with SetOptions (#10128) 2022-06-10 08:51:45 -07:00
block_prefix_index.h Fix bug with kHashSearch and changing prefix_extractor with SetOptions (#10128) 2022-06-10 08:51:45 -07:00
block_test.cc internal_repo_rocksdb (-8794174668376270091) (#12114) 2023-12-01 11:10:30 -08:00
block_type.h Remove deprecated block-based filter (#10184) 2022-06-16 15:51:33 -07:00
cachable_entry.h HyperClockCache support for SecondaryCache, with refactoring (#11301) 2023-03-17 20:23:49 -07:00
data_block_footer.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
data_block_footer.h Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
data_block_hash_index.cc Format files under table/ by clang-format (#10852) 2022-10-25 11:50:38 -07:00
data_block_hash_index.h Fix build with gcc 13 by including <cstdint> (#11118) 2023-01-25 14:30:32 -08:00
data_block_hash_index_test.cc Group SST write in flush, compaction and db open with new stats (#11910) 2023-12-29 15:29:23 -08:00
filter_block.h Record and use the tail size to prefetch table tail (#11406) 2023-05-08 13:14:28 -07:00
filter_block_reader_common.cc Avoid double block cache lookup during Seek with async_io option (#11616) 2023-09-18 11:32:30 -07:00
filter_block_reader_common.h Use user-provided ReadOptions for metadata block reads more often (#11208) 2023-04-04 16:53:14 -07:00
filter_policy.cc internal_repo_rocksdb (-8794174668376270091) (#12114) 2023-12-01 11:10:30 -08:00
filter_policy_internal.h Make RibbonFilterPolicy::bloom_before_level mutable (SetOptions()) (#11838) 2023-09-15 15:46:10 -07:00
flush_block_policy.cc Change internal headers with duplicate names (#11408) 2023-05-17 11:27:09 -07:00
flush_block_policy_impl.h Change internal headers with duplicate names (#11408) 2023-05-17 11:27:09 -07:00
full_filter_block.cc internal_repo_rocksdb (-8794174668376270091) (#12114) 2023-12-01 11:10:30 -08:00
full_filter_block.h Use user-provided ReadOptions for metadata block reads more often (#11208) 2023-04-04 16:53:14 -07:00
full_filter_block_test.cc internal_repo_rocksdb (-8794174668376270091) (#12114) 2023-12-01 11:10:30 -08:00
hash_index_reader.cc Add support to strip / pad timestamp when creating / reading a block based table (#11495) 2023-06-01 11:10:03 -07:00
hash_index_reader.h Extend Get/MultiGet deadline support to table open (#6982) 2020-06-29 14:53:17 -07:00
index_builder.cc internal_repo_rocksdb (-8794174668376270091) (#12114) 2023-12-01 11:10:30 -08:00
index_builder.h Fix some bugs in index builder and reader for the UDT in memtable only feature (#12062) 2023-11-21 14:05:02 -08:00
index_reader_common.cc Avoid double block cache lookup during Seek with async_io option (#11616) 2023-09-18 11:32:30 -07:00
index_reader_common.h Add support to strip / pad timestamp when creating / reading a block based table (#11495) 2023-06-01 11:10:03 -07:00
mock_block_based_table.h Remove deprecated block-based filter (#10184) 2022-06-16 15:51:33 -07:00
parsed_full_filter_block.cc Hide FilterBits{Builder,Reader} from public API (#9592) 2022-02-17 16:34:46 -08:00
parsed_full_filter_block.h Major Cache refactoring, CPU efficiency improvement (#10975) 2023-01-11 14:20:40 -08:00
partitioned_filter_block.cc Refactor FilePrefetchBuffer code (#12097) 2024-01-05 09:29:01 -08:00
partitioned_filter_block.h Add support to strip / pad timestamp when creating / reading a block based table (#11495) 2023-06-01 11:10:03 -07:00
partitioned_filter_block_test.cc internal_repo_rocksdb (-8794174668376270091) (#12114) 2023-12-01 11:10:30 -08:00
partitioned_index_iterator.cc Refactor FilePrefetchBuffer code (#12097) 2024-01-05 09:29:01 -08:00
partitioned_index_iterator.h Format files under table/ by clang-format (#10852) 2022-10-25 11:50:38 -07:00
partitioned_index_reader.cc Refactor FilePrefetchBuffer code (#12097) 2024-01-05 09:29:01 -08:00
partitioned_index_reader.h Record and use the tail size to prefetch table tail (#11406) 2023-05-08 13:14:28 -07:00
reader_common.cc format_version=6 and context-aware block checksums (#9058) 2023-07-30 16:40:01 -07:00
reader_common.h format_version=6 and context-aware block checksums (#9058) 2023-07-30 16:40:01 -07:00
uncompression_dict_reader.cc Avoid double block cache lookup during Seek with async_io option (#11616) 2023-09-18 11:32:30 -07:00
uncompression_dict_reader.h Group rocksdb.sst.read.micros stat by IOActivity flush and compaction (#11288) 2023-04-21 09:07:18 -07:00