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81c9cc9b3b
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Tomislav Novak 81c9cc9b3b Tailing iterator 
Summary:
This diff implements a special type of iterator that doesn't create a snapshot
(can be used to read newly inserted data) and is optimized for doing sequential
reads.

TailingIterator uses current superversion number to determine whether to
invalidate its internal iterators. If the version hasn't changed, it can often
avoid doing expensive seeks over immutable structures (sst files and immutable
memtables).

Test Plan:
* new unit tests
* running LD with this patch

Reviewers: igor, dhruba, haobo, sdong, kailiu

Reviewed By: sdong

CC: leveldb, lovro, march

Differential Revision: https://reviews.facebook.net/D15285
2014-01-23 16:26:08 -08:00
..
builder.cc Don't always compress L0 files written by memtable flush 2014-01-07 21:50:26 -08:00
builder.h Don't always compress L0 files written by memtable flush 2014-01-07 21:50:26 -08:00
c_test.c Rename leveldb to rocksdb in C api 2013-12-10 10:48:35 +02:00
c.cc C API: add rocksdb_env_set_high_priority_background_threads 2013-12-31 15:14:18 -08:00
compaction_picker.cc Statistics code cleanup 2014-01-17 12:46:06 -08:00
compaction_picker.h Fix SIGSEGV in compaction picker 2014-01-17 12:02:03 -08:00
compaction.cc Unfriending classes 2014-01-22 10:55:16 -08:00
compaction.h Unfriending classes 2014-01-22 10:55:16 -08:00
corruption_test.cc Make "Table" pluggable 2013-10-28 17:54:09 -07:00
db_bench.cc Statistics code cleanup 2014-01-17 12:46:06 -08:00
db_filesnapshot.cc Move functions from VersionSet to Version 2014-01-15 16:18:04 -08:00
db_impl_readonly.cc Refactor Recover() code 2014-01-22 10:45:26 -08:00
db_impl_readonly.h Support multi-threaded DisableFileDeletions() and EnableFileDeletions() 2014-01-02 03:33:42 -08:00
db_impl.cc Tailing iterator 2014-01-23 16:26:08 -08:00
db_impl.h Tailing iterator 2014-01-23 16:26:08 -08:00
db_iter.cc Get rid of some shared_ptrs 2013-12-03 11:17:58 -08:00
db_iter.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
db_stats_logger.cc Move functions from VersionSet to Version 2014-01-15 16:18:04 -08:00
db_test.cc Tailing iterator 2014-01-23 16:26:08 -08:00
dbformat_test.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
dbformat.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
dbformat.h Make "Table" pluggable 2013-10-28 17:54:09 -07:00
deletefile_test.cc Start DeleteFileTest with clean plate 2013-11-15 16:30:23 -08:00
filename_test.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
filename.cc Unify DeleteFile and DeleteWalFiles 2013-10-25 08:32:14 -07:00
filename.h Unify DeleteFile and DeleteWalFiles 2013-10-25 08:32:14 -07:00
log_format.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
log_reader.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
log_reader.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
log_test.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
log_writer.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
log_writer.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
memtable.cc Statistics code cleanup 2014-01-17 12:46:06 -08:00
memtable.h Remove the unnecessary use of shared_ptr 2014-01-15 18:22:01 -08:00
memtablelist.cc Introduce MergeContext to Lazily Initialize merge operand list 2013-12-11 11:37:28 -08:00
memtablelist.h Introduce MergeContext to Lazily Initialize merge operand list 2013-12-11 11:37:28 -08:00
merge_context.h Introduce MergeContext to Lazily Initialize merge operand list 2013-12-11 11:37:28 -08:00
merge_helper.cc Statistics code cleanup 2014-01-17 12:46:06 -08:00
merge_helper.h [RocksDB] Use raw pointer instead of shared pointer when passing Statistics object internally 2013-11-25 10:38:15 -08:00
merge_operator.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
merge_test.cc Use ASSERT_EQ() instead of assert() in merge_test 2014-01-11 09:25:47 -08:00
perf_context_test.cc Killing Transform Rep 2013-12-03 12:42:15 -08:00
prefix_filter_iterator.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
prefix_test.cc Killing Transform Rep 2013-12-03 12:42:15 -08:00
repair.cc VersionEdit not to take NumLevels() 2014-01-14 15:27:09 -08:00
simple_table_db_test.cc Statistics code cleanup 2014-01-17 12:46:06 -08:00
skiplist_test.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
skiplist.h Implementing DynamicIterator for TransformRepNoLock 2013-11-08 00:31:09 -08:00
snapshot.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
table_cache.cc Hotfix the bug in table cache's GetSliceForFileNumber 2014-01-02 10:30:42 -08:00
table_cache.h Follow-up Cleaning-up After D13521 2013-10-30 10:52:33 -07:00
table_properties_collector_test.cc Move flush_block_policy from Options to TableFactory 2013-11-19 22:00:48 -08:00
table_properties_collector.cc Improve the readability of the TableProperties::ToString() 2013-11-21 17:54:23 -08:00
table_properties_collector.h Improve the "table stats" 2013-11-19 16:29:42 -08:00
tailing_iter.cc Tailing iterator 2014-01-23 16:26:08 -08:00
tailing_iter.h Tailing iterator 2014-01-23 16:26:08 -08:00
transaction_log_impl.cc Fix the string format issue 2013-11-12 21:05:39 -08:00
transaction_log_impl.h Making the transaction log iterator more robust 2013-11-04 20:49:03 -08:00
version_edit_test.cc Remove compaction pointers 2014-01-16 14:06:53 -08:00
version_edit.cc Remove compaction pointers 2014-01-16 14:06:53 -08:00
version_edit.h Remove compaction pointers 2014-01-16 14:06:53 -08:00
version_set_reduce_num_levels.cc Remove compaction pointers 2014-01-16 14:06:53 -08:00
version_set_test.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
version_set.cc Unfriending classes 2014-01-22 10:55:16 -08:00
version_set.h Remove compaction pointers 2014-01-16 14:06:53 -08:00
write_batch_internal.h In-place updates for equal keys and similar sized values 2013-10-31 11:27:12 -07:00
write_batch_test.cc Fix memtable construction in tests 2014-01-14 15:36:12 -08:00
write_batch.cc Statistics code cleanup 2014-01-17 12:46:06 -08:00