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Andrew Kryczka 072ae671a7 Apply use_direct_io_for_flush_and_compaction to writes only 
Summary:
Previously `DBOptions::use_direct_io_for_flush_and_compaction=true` combined with `DBOptions::use_direct_reads=false` could cause RocksDB to simultaneously read from two file descriptors for the same file, where background reads used direct I/O and foreground reads used buffered I/O. Our measurements found this mixed-mode I/O negatively impacted foreground read perf, compared to when only buffered I/O was used.

This PR makes the mixed-mode I/O situation impossible by repurposing `DBOptions::use_direct_io_for_flush_and_compaction` to only apply to background writes, and `DBOptions::use_direct_reads` to apply to all reads. There is no risk of direct background direct writes happening simultaneously with buffered reads since we never read from and write to the same file simultaneously.
Closes https://github.com/facebook/rocksdb/pull/3829

Differential Revision: D7915443

Pulled By: ajkr

fbshipit-source-id: 78bcbf276449b7e7766ab6b0db246f789fb1b279
2018-05-09 19:42:58 -07:00
..
builder.cc Support for Column family specific paths. 2018-04-05 19:58:20 -07:00
builder.h Stream 2017-11-10 09:26:24 -08:00
c.cc expose WAL iterator in the C API 2018-04-27 16:56:59 -07:00
c_test.c comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
column_family.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
column_family.h Add max_subcompactions as a compaction option 2018-04-27 11:57:39 -07:00
column_family_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
compact_files_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
compacted_db_impl.cc Fix coverity issues column_family, compaction_db/iterator 2017-10-27 11:26:42 -07:00
compacted_db_impl.h Comment out unused variables 2018-03-05 13:13:41 -08:00
compaction.cc MaxFileSizeForLevel: adjust max_file_size for dynamic level compaction 2018-05-03 16:42:13 -07:00
compaction.h MaxFileSizeForLevel: adjust max_file_size for dynamic level compaction 2018-05-03 16:42:13 -07:00
compaction_iteration_stats.h add counter for deletion dropping optimization 2017-08-19 14:10:08 -07:00
compaction_iterator.cc Blob DB: Improve FIFO eviction 2018-03-06 11:57:42 -08:00
compaction_iterator.h Comment out unused variables 2018-03-05 13:13:41 -08:00
compaction_iterator_test.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
compaction_job.cc MaxFileSizeForLevel: adjust max_file_size for dynamic level compaction 2018-05-03 16:42:13 -07:00
compaction_job.h MaxFileSizeForLevel: adjust max_file_size for dynamic level compaction 2018-05-03 16:42:13 -07:00
compaction_job_stats_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
compaction_job_test.cc Add max_subcompactions as a compaction option 2018-04-27 11:57:39 -07:00
compaction_picker.cc MaxFileSizeForLevel: adjust max_file_size for dynamic level compaction 2018-05-03 16:42:13 -07:00
compaction_picker.h Add max_subcompactions as a compaction option 2018-04-27 11:57:39 -07:00
compaction_picker_test.cc Support for Column family specific paths. 2018-04-05 19:58:20 -07:00
compaction_picker_universal.cc MaxFileSizeForLevel: adjust max_file_size for dynamic level compaction 2018-05-03 16:42:13 -07:00
compaction_picker_universal.h Make Universal compaction options dynamic 2017-12-11 13:27:06 -08:00
comparator_db_test.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
convenience.cc Delete files in multiple ranges at once 2018-01-30 13:56:39 -08:00
corruption_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
cuckoo_table_db_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
db_basic_test.cc Disallow compactions if there isn't enough free space 2018-03-06 16:27:54 -08:00
db_blob_index_test.cc fix lite build 2017-10-17 08:57:09 -07:00
db_block_cache_test.cc avoid double delete on dummy record insertion failure 2018-05-01 16:01:28 -07:00
db_bloom_filter_test.cc comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
db_compaction_filter_test.cc fix wrong length in snprintf 2018-03-16 13:27:55 -07:00
db_compaction_test.cc Apply use_direct_io_for_flush_and_compaction to writes only 2018-05-09 19:42:58 -07:00
db_dynamic_level_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
db_encryption_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_filesnapshot.cc fix behavior does not match name for "IsFileDeletionsEnabled" 2018-03-21 22:13:34 -07:00
db_flush_test.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
db_impl.cc Better destroydb 2018-05-03 16:13:09 -07:00
db_impl.h Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
db_impl_compaction_flush.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
db_impl_debug.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
db_impl_experimental.cc Inform caller when rocksdb is stalling writes 2017-10-05 18:11:43 -07:00
db_impl_files.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
db_impl_open.cc Apply use_direct_io_for_flush_and_compaction to writes only 2018-05-09 19:42:58 -07:00
db_impl_readonly.cc comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
db_impl_readonly.h allowing CompactFiles to return new file names 2018-03-15 11:58:12 -07:00
db_impl_write.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
db_info_dumper.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_info_dumper.h Change RocksDB License 2017-07-15 16:11:23 -07:00
db_inplace_update_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_io_failure_test.cc Fix LITE unit tests 2017-07-26 21:11:47 -07:00
db_iter.cc Add rocksdb.iterator.internal-key property 2018-02-20 19:12:09 -08:00
db_iter.h WritePrepared Txn: Return NotSupported on iterator refresh 2017-12-18 22:29:30 -08:00
db_iter_test.cc comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
db_iterator_test.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
db_log_iter_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
db_memtable_test.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
db_merge_operator_test.cc Fix TSAN timeout in MergeOperatorPinningTest.Randomized/x test 2018-03-02 16:27:21 -08:00
db_options_test.cc comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
db_properties_test.cc Add block cache related DB properties 2018-04-18 21:42:25 -07:00
db_range_del_test.cc Add max_subcompactions as a compaction option 2018-04-27 11:57:39 -07:00
db_sst_test.cc comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
db_statistics_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_table_properties_test.cc fix deletion-triggered compaction in table builder 2017-09-28 18:17:30 -07:00
db_tailing_iter_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
db_test.cc Introduce and use the option to disable stall notifications structures 2018-05-09 10:13:53 -07:00
db_test2.cc Apply use_direct_io_for_flush_and_compaction to writes only 2018-05-09 19:42:58 -07:00
db_test_util.cc Support for Column family specific paths. 2018-04-05 19:58:20 -07:00
db_test_util.h Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
db_universal_compaction_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
db_wal_test.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
db_write_test.cc Rename function for handling WAL write error 2018-03-22 15:58:39 -07:00
dbformat.cc add kEntryRangeDeletion 2018-04-13 11:27:17 -07:00
dbformat.h Imporve perf of random read and insert compare by suggesting inlining to the compiler 2018-03-23 13:26:55 -07:00
dbformat_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
deletefile_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
event_helpers.cc comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
event_helpers.h Change RocksDB License 2017-07-15 16:11:23 -07:00
experimental.cc comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
external_sst_file_basic_test.cc optimize file ingestion checks for range deletion overlap 2017-11-28 11:27:02 -08:00
external_sst_file_ingestion_job.cc Improve accuracy of I/O stats collection of external SST ingestion. 2018-04-13 10:58:42 -07:00
external_sst_file_ingestion_job.h Initialize a boolean member variable of a struct. 2018-04-16 14:28:01 -07:00
external_sst_file_test.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
fault_injection_test.cc Split FaultInjectionTest.FaultTest to avoid timeout 2018-05-07 12:29:58 -07:00
file_indexer.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
file_indexer.h Change RocksDB License 2017-07-15 16:11:23 -07:00
file_indexer_test.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
filename_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
flush_job.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
flush_job.h Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
flush_job_test.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
flush_scheduler.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
flush_scheduler.h Change RocksDB License 2017-07-15 16:11:23 -07:00
forward_iterator.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
forward_iterator.h Comment out unused variables 2018-03-05 13:13:41 -08:00
forward_iterator_bench.cc fix gflags namespace 2017-12-01 10:42:05 -08:00
internal_stats.cc Rename vars to satisfy unity built 2018-05-04 15:28:06 -07:00
internal_stats.h Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
job_context.h Introduce and use the option to disable stall notifications structures 2018-05-09 10:13:53 -07:00
listener_test.cc fix some text in comments. 2018-04-10 15:59:24 -07:00
log_format.h Change RocksDB License 2017-07-15 16:11:23 -07:00
log_reader.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
log_reader.h Suppress lint in old files 2018-01-29 12:56:42 -08:00
log_test.cc Use nullptr instead of NULL / 0 more consistently. 2018-03-07 12:42:12 -08:00
log_writer.cc check return status for Sync() and Append() calls to avoid corruption 2018-04-19 14:13:46 -07:00
log_writer.h Clarification regarding record format 2018-03-08 10:27:25 -08:00
logs_with_prep_tracker.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
logs_with_prep_tracker.h Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
malloc_stats.cc Disallow compactions if there isn't enough free space 2018-03-06 16:27:54 -08:00
malloc_stats.h Change RocksDB License 2017-07-15 16:11:23 -07:00
managed_iterator.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
managed_iterator.h Change RocksDB License 2017-07-15 16:11:23 -07:00
manual_compaction_test.cc Speedup ManualCompactionTest.Test 2018-05-03 16:13:09 -07:00
memtable.cc WritePrepared Txn: add stats 2018-04-07 21:56:42 -07:00
memtable.h InlineSkiplist: don't decode keys unnecessarily during comparisons 2018-03-23 12:14:30 -07:00
memtable_list.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
memtable_list.h Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
memtable_list_test.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
merge_context.h Change RocksDB License 2017-07-15 16:11:23 -07:00
merge_helper.cc WritePrepared Txn: Support merge operator 2018-02-09 14:57:54 -08:00
merge_helper.h WritePrepared Txn: Support merge operator 2018-02-09 14:57:54 -08:00
merge_helper_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
merge_operator.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
merge_test.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
obsolete_files_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
options_file_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
perf_context_test.cc Improve write time breakdown stats 2018-04-23 17:58:54 -07:00
pinned_iterators_manager.h Change RocksDB License 2017-07-15 16:11:23 -07:00
plain_table_db_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
pre_release_callback.h Fix pre_release callback argument list. 2018-04-05 11:12:16 -07:00
prefix_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
range_del_aggregator.cc Recommit "Avoid adding tombstones of the same file to RangeDelAggregator multiple times" 2018-05-04 16:45:15 -07:00
range_del_aggregator.h Recommit "Avoid adding tombstones of the same file to RangeDelAggregator multiple times" 2018-05-04 16:45:15 -07:00
range_del_aggregator_test.cc optimize file ingestion checks for range deletion overlap 2017-11-28 11:27:02 -08:00
read_callback.h write-prepared txn: call IsInSnapshot 2017-09-11 09:14:48 -07:00
repair.cc Support for Column family specific paths. 2018-04-05 19:58:20 -07:00
repair_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
snapshot_checker.h Comment out unused variables 2018-03-05 13:13:41 -08:00
snapshot_impl.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
snapshot_impl.h WritePrepared Txn: smallest_prepare optimization 2018-04-02 20:27:41 -07:00
table_cache.cc Disable readahead when using mmap for reads 2018-05-08 12:13:18 -07:00
table_cache.h Change RocksDB License 2017-07-15 16:11:23 -07:00
table_properties_collector.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
table_properties_collector.h Comment out unused variables 2018-03-05 13:13:41 -08:00
table_properties_collector_test.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
transaction_log_impl.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
transaction_log_impl.h WritePrepared Txn: Refactor conf params 2017-11-10 17:28:12 -08:00
version_builder.cc Fix some typos in comments and docs. 2018-03-08 10:27:25 -08:00
version_builder.h Allow DB reopen with reduced options.num_levels 2017-08-24 16:10:54 -07:00
version_builder_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
version_edit.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
version_edit.h Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
version_edit_test.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
version_set.cc Rename vars to satisfy unity built 2018-05-04 15:28:06 -07:00
version_set.h Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
version_set_test.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
wal_manager.cc Fix memleak when DB::DeleteFile() 2018-01-11 18:57:33 -08:00
wal_manager.h Fix memleak when DB::DeleteFile() 2018-01-11 18:57:33 -08:00
wal_manager_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
write_batch.cc WritePrepared Txn: enable TryAgain for duplicates at the end of the batch 2018-04-20 15:28:19 -07:00
write_batch_base.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
write_batch_internal.h Fix some typos in comments and docs. 2018-03-08 10:27:25 -08:00
write_batch_test.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
write_callback.h Change RocksDB License 2017-07-15 16:11:23 -07:00
write_callback_test.cc fix memory leak in two_level_iterator 2018-04-15 17:26:26 -07:00
write_controller.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
write_controller.h Change RocksDB License 2017-07-15 16:11:23 -07:00
write_controller_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
write_thread.cc Improve write time breakdown stats 2018-04-23 17:58:54 -07:00
write_thread.h WritePrepared Txn: Duplicate Keys, Txn Part 2018-02-05 18:43:24 -08:00