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sdong 9d0b8f19d9 plain table reader: avoid re-read the same position for index and data in non-mmap mode 
Summary: In non-mmap mode, plain table reader can issue two pread() for index checking and reading the actual data, although it's for the same location. By reusing the key decoder, we reuse the buffer used for the two to avoid it.

Test Plan: Run unit tests. Run table_reader_bench and see from strace the repeat read cases to disappear.

Reviewers: anthony, yhchiang, rven, kradhakrishnan, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D50949
2015-11-18 16:49:08 -08:00
..
adaptive_table_factory.cc Pass column family ID to table property collector 2015-10-09 14:36:51 -07:00
adaptive_table_factory.h Pass column family ID to table property collector 2015-10-09 14:36:51 -07:00
block.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_based_filter_block.cc bloom hit/miss stats for SST and memtable 2015-10-07 11:23:20 -07:00
block_based_filter_block.h
block_based_filter_block_test.cc
block_based_table_builder.cc Revert "Adding new table properties" 2015-11-06 16:49:38 -08:00
block_based_table_builder.h Move skip_table_builder_flush to BlockBasedTableOption 2015-10-30 18:33:01 -07:00
block_based_table_factory.cc Fix build broken by previous commit of "option helper refactor" 2015-11-17 16:52:54 -08:00
block_based_table_factory.h Merge pull request #805 from SherlockNoMad/OptionHelperFix 2015-11-17 16:24:52 -08:00
block_based_table_reader.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_based_table_reader.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_builder.cc
block_builder.h
block_hash_index.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_hash_index.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_hash_index_test.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_prefix_index.cc
block_prefix_index.h
block_test.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
bloom_block.cc
bloom_block.h
cuckoo_table_builder.cc Move rate_limiter, write buffering, most perf context instrumentation and most random kill out of Env 2015-07-17 16:58:18 -07:00
cuckoo_table_builder.h Move rate_limiter, write buffering, most perf context instrumentation and most random kill out of Env 2015-07-17 16:58:18 -07:00
cuckoo_table_builder_test.cc Block cuckoo table tests in ROCKSDB_LITE 2015-07-20 10:50:46 -07:00
cuckoo_table_factory.cc Pass column family ID to table property collector 2015-10-09 14:36:51 -07:00
cuckoo_table_factory.h Add OptionsUtil::LoadOptionsFromFile() API 2015-11-12 06:52:43 -08:00
cuckoo_table_reader.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
cuckoo_table_reader.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
cuckoo_table_reader_test.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
filter_block.h
flush_block_policy.cc
format.cc Add ZSTD (not final format) compression type 2015-08-28 11:01:13 -07:00
format.h Move rate_limiter, write buffering, most perf context instrumentation and most random kill out of Env 2015-07-17 16:58:18 -07:00
full_filter_block.cc bloom hit/miss stats for SST and memtable 2015-10-07 11:23:20 -07:00
full_filter_block.h
full_filter_block_test.cc
get_context.cc Compaction filter on merge operands 2015-10-07 09:30:03 -07:00
get_context.h
internal_iterator.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
iter_heap.h
iterator.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
iterator_wrapper.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
merger.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
merger.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
merger_test.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
meta_blocks.cc Revert "Adding new table properties" 2015-11-06 16:49:38 -08:00
meta_blocks.h Moving memtable related files from util to a new directory memtable 2015-10-16 14:10:33 -07:00
mock_table.cc Fix MockTable ID storage 2015-10-28 10:53:14 -07:00
mock_table.h Fix MockTable ID storage 2015-10-28 10:53:14 -07:00
plain_table_builder.cc Pass column family ID to table property collector 2015-10-09 14:36:51 -07:00
plain_table_builder.h Pass column family ID to table property collector 2015-10-09 14:36:51 -07:00
plain_table_factory.cc Merge pull request #805 from SherlockNoMad/OptionHelperFix 2015-11-17 16:24:52 -08:00
plain_table_factory.h Fix build broken by previous commit of "option helper refactor" 2015-11-17 16:52:54 -08:00
plain_table_index.cc
plain_table_index.h
plain_table_key_coding.cc Fix the bug of using freed memory introduced by recent plain table reader patch 2015-09-23 16:16:26 -07:00
plain_table_key_coding.h PlainTableReader to support non-mmap mode 2015-09-23 11:41:07 -07:00
plain_table_reader.cc plain table reader: avoid re-read the same position for index and data in non-mmap mode 2015-11-18 16:49:08 -08:00
plain_table_reader.h plain table reader: avoid re-read the same position for index and data in non-mmap mode 2015-11-18 16:49:08 -08:00
scoped_arena_iterator.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
sst_file_writer.cc Move skip_table_builder_flush to BlockBasedTableOption 2015-10-30 18:33:01 -07:00
table_builder.h Move skip_table_builder_flush to BlockBasedTableOption 2015-10-30 18:33:01 -07:00
table_properties.cc Revert "Adding new table properties" 2015-11-06 16:49:38 -08:00
table_properties_internal.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
table_reader.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
table_reader_bench.cc plain table reader: avoid re-read the same position for index and data in non-mmap mode 2015-11-18 16:49:08 -08:00
table_test.cc Revert "Adding new table properties" 2015-11-06 16:49:38 -08:00
two_level_iterator.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
two_level_iterator.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00