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Yanqin Jin b512f4bc76 Batch blob read IO for MultiGet (#8699) 
Summary:
In batched `MultiGet()`, RocksDB batches blob read IO and uses `RandomAccessFileReader::MultiRead()`
to read the blobs instead of issuing multiple `Read()`.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8699

Test Plan:
```
make check
```

Reviewed By: ltamasi

Differential Revision: D31030861

Pulled By: riversand963

fbshipit-source-id: a0df6060cbfd54cff9515a4eee08807b1dbcb0c8
2021-09-17 19:23:13 -07:00
..
blob_constants.h
Move BlobDB related files under db/ to db/blob/ (#6519)
2020-03-12 11:00:56 -07:00
blob_counting_iterator_test.cc
Add an internal iterator that can measure the inflow of blobs (#8443)
2021-06-23 10:25:47 -07:00
blob_counting_iterator.h
Log the amount of blob garbage generated by compactions in the MANIFEST (#8450)
2021-06-24 16:11:56 -07:00
blob_fetcher.cc
Support for Merge in Integrated BlobDB with base values (#8292)
2021-06-10 12:58:37 -07:00
blob_fetcher.h
Support for Merge in Integrated BlobDB with base values (#8292)
2021-06-10 12:58:37 -07:00
blob_file_addition_test.cc
Print blob file checksums as hex (#8437)
2021-06-22 09:49:44 -07:00
blob_file_addition.cc
Print blob file checksums as hex (#8437)
2021-06-22 09:49:44 -07:00
blob_file_addition.h
Move BlobDB related files under db/ to db/blob/ (#6519)
2020-03-12 11:00:56 -07:00
blob_file_builder_test.cc
Expose blob file information through the EventListener interface (#8675)
2021-09-16 17:23:36 -07:00
blob_file_builder.cc
Expose blob file information through the EventListener interface (#8675)
2021-09-16 17:23:36 -07:00
blob_file_builder.h
Expose blob file information through the EventListener interface (#8675)
2021-09-16 17:23:36 -07:00
blob_file_cache_test.cc
Rename ImmutableOptions variables (#8409)
2021-06-16 16:51:38 -07:00
blob_file_cache.cc
Rename ImmutableOptions variables (#8409)
2021-06-16 16:51:38 -07:00
blob_file_cache.h
Rename ImmutableOptions variables (#8409)
2021-06-16 16:51:38 -07:00
blob_file_completion_callback.h
Expose blob file information through the EventListener interface (#8675)
2021-09-16 17:23:36 -07:00
blob_file_garbage_test.cc
Move BlobDB related files under db/ to db/blob/ (#6519)
2020-03-12 11:00:56 -07:00
blob_file_garbage.cc
Move BlobDB related files under db/ to db/blob/ (#6519)
2020-03-12 11:00:56 -07:00
blob_file_garbage.h
Move BlobDB related files under db/ to db/blob/ (#6519)
2020-03-12 11:00:56 -07:00
blob_file_meta.cc
Add BlobMetaData retrieval methods (#8273)
2021-06-28 08:13:29 -07:00
blob_file_meta.h
Add BlobMetaData retrieval methods (#8273)
2021-06-28 08:13:29 -07:00
blob_file_reader_test.cc
Batch blob read IO for MultiGet (#8699)
2021-09-17 19:23:13 -07:00
blob_file_reader.cc
Batch blob read IO for MultiGet (#8699)
2021-09-17 19:23:13 -07:00
blob_file_reader.h
Batch blob read IO for MultiGet (#8699)
2021-09-17 19:23:13 -07:00
blob_garbage_meter_test.cc
Add a class for measuring the amount of garbage generated during compaction (#8426)
2021-06-21 22:25:30 -07:00
blob_garbage_meter.cc
Add a class for measuring the amount of garbage generated during compaction (#8426)
2021-06-21 22:25:30 -07:00
blob_garbage_meter.h
Add a class for measuring the amount of garbage generated during compaction (#8426)
2021-06-21 22:25:30 -07:00
blob_index.h
Batch blob read IO for MultiGet (#8699)
2021-09-17 19:23:13 -07:00
blob_log_format.cc
Introduce BlobFileCache and add support for blob files to Get() (#7540)
2020-10-15 13:04:47 -07:00
blob_log_format.h
Add a class for measuring the amount of garbage generated during compaction (#8426)
2021-06-21 22:25:30 -07:00
blob_log_sequential_reader.cc
Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033)
2021-03-15 04:34:11 -07:00
blob_log_sequential_reader.h
Fix a issue with initializing blob header buffer (#8537)
2021-08-02 17:15:06 -07:00
blob_log_writer.cc
Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033)
2021-03-15 04:34:11 -07:00
blob_log_writer.h
Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033)
2021-03-15 04:34:11 -07:00
db_blob_basic_test.cc
Batch blob read IO for MultiGet (#8699)
2021-09-17 19:23:13 -07:00
db_blob_compaction_test.cc
Support custom env in db_blob_{basic,compaction,corruption,index}_test (#8817)
2021-09-07 11:13:56 -07:00
db_blob_corruption_test.cc
Support custom env in db_blob_{basic,compaction,corruption,index}_test (#8817)
2021-09-07 11:13:56 -07:00
db_blob_index_test.cc
Support custom env in db_blob_{basic,compaction,corruption,index}_test (#8817)
2021-09-07 11:13:56 -07:00