fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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Levi Tamasi fe56cb9aa0 Eliminate some allocations/copies around the blob cache (#10647) ... Summary: Historically, `BlobFileReader` has returned the blob(s) read from the file in the `PinnableSlice` provided by the client. This interface was preserved when caching was implemented for blobs, which meant that the blob data was copied multiple times when caching was in use: first, into the client-provided `PinnableSlice` (by `BlobFileReader::SaveValue`), and then, into the object stored in the cache (by `BlobSource::PutBlobIntoCache`). The patch eliminates these copies and the related allocations by changing `BlobFileReader` so it returns its results in the form of heap-allocated `BlobContents` objects that can be directly inserted into the cache. The allocations backing these `BlobContents` objects are made using the blob cache's allocator if the blobs are to be inserted into the cache (i.e. if a cache is configured and the `fill_cache` read option is set). Note: this PR focuses on the common case when blobs are compressed; some further small optimizations are possible for uncompressed blobs. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10647 Test Plan: `make check` Reviewed By: riversand963 Differential Revision: D39335185 Pulled By: ltamasi fbshipit-source-id: 464503d60a5520d654c8273ffb8efd5d1bcd7b36		2 years ago
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blob_constants.h	Move BlobDB related files under db/ to db/blob/ (#6519)	5 years ago
blob_contents.cc	Support custom allocators for the blob cache (#10628)	2 years ago
blob_contents.h	Support custom allocators for the blob cache (#10628)	2 years ago
blob_counting_iterator.h	Log the amount of blob garbage generated by compactions in the MANIFEST (#8450)	4 years ago
blob_counting_iterator_test.cc	Cleanup multiple implementations of VectorIterator (#8901)	3 years ago
blob_fetcher.cc	Support readahead during compaction for blob files (#9187)	3 years ago
blob_fetcher.h	Support readahead during compaction for blob files (#9187)	3 years ago
blob_file_addition.cc	Print blob file checksums as hex (#8437)	4 years ago
blob_file_addition.h	Move BlobDB related files under db/ to db/blob/ (#6519)	5 years ago
blob_file_addition_test.cc	Print blob file checksums as hex (#8437)	4 years ago
blob_file_builder.cc	Support custom allocators for the blob cache (#10628)	2 years ago
blob_file_builder.h	Support prepopulating/warming the blob cache (#10298)	2 years ago
blob_file_builder_test.cc	Support prepopulating/warming the blob cache (#10298)	2 years ago
blob_file_cache.cc	Rename ImmutableOptions variables (#8409)	4 years ago
blob_file_cache.h	Rename ImmutableOptions variables (#8409)	4 years ago
blob_file_cache_test.cc	Have Cache use Status::MemoryLimit (#10262)	3 years ago
blob_file_completion_callback.h	Fix LITE mode builds on MacOs (#8981)	3 years ago
blob_file_garbage.cc	Move BlobDB related files under db/ to db/blob/ (#6519)	5 years ago
blob_file_garbage.h	Move BlobDB related files under db/ to db/blob/ (#6519)	5 years ago
blob_file_garbage_test.cc	Move BlobDB related files under db/ to db/blob/ (#6519)	5 years ago
blob_file_meta.cc	Add BlobMetaData retrieval methods (#8273)	4 years ago
blob_file_meta.h	Add BlobMetaData retrieval methods (#8273)	4 years ago
blob_file_reader.cc	Eliminate some allocations/copies around the blob cache (#10647)	2 years ago
blob_file_reader.h	Eliminate some allocations/copies around the blob cache (#10647)	2 years ago
blob_file_reader_test.cc	Eliminate some allocations/copies around the blob cache (#10647)	2 years ago
blob_garbage_meter.cc	Add a class for measuring the amount of garbage generated during compaction (#8426)	4 years ago
blob_garbage_meter.h	Add a class for measuring the amount of garbage generated during compaction (#8426)	4 years ago
blob_garbage_meter_test.cc	Add a class for measuring the amount of garbage generated during compaction (#8426)	4 years ago
blob_index.h	Remove local static string (#8103)	2 years ago
blob_log_format.cc	Remove local static string (#8103)	2 years ago
blob_log_format.h	Add a class for measuring the amount of garbage generated during compaction (#8426)	4 years ago
blob_log_sequential_reader.cc	Add rate limiter priority to ReadOptions (#9424)	3 years ago
blob_log_sequential_reader.h	Fix a issue with initializing blob header buffer (#8537)	3 years ago
blob_log_writer.cc	WritableFileWriter tries to skip operations after failure (#10489)	2 years ago
blob_log_writer.h	Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033)	4 years ago
blob_read_request.h	Enable blob caching for MultiGetBlob in RocksDB (#10272)	3 years ago
blob_source.cc	Eliminate some allocations/copies around the blob cache (#10647)	2 years ago
blob_source.h	Eliminate some allocations/copies around the blob cache (#10647)	2 years ago
blob_source_test.cc	Eliminate some allocations/copies around the blob cache (#10647)	2 years ago
db_blob_basic_test.cc	Avoid recompressing cold block in CompressedSecondaryCache (#10527)	2 years ago
db_blob_compaction_test.cc	Fix wrong value passed in compaction filter in BlobDB (#10391)	2 years ago
db_blob_corruption_test.cc	Enable a few unit tests to use custom Env objects (#9087)	3 years ago
db_blob_index_test.cc	Remove own ToString() (#9955)	3 years ago
prefetch_buffer_collection.cc	Support readahead during compaction for blob files (#9187)	3 years ago
prefetch_buffer_collection.h	Support readahead during compaction for blob files (#9187)	3 years ago