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d2a92c13bc
rocksdb/db
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Jim Meyering d2a92c13bc avoid returning a number-of-active-keys estimate of nearly 2^64 
Summary:
If accumulated_num_non_deletions_ were ever smaller than
accumulated_num_deletions_, the computation of
"accumulated_num_non_deletions_ - accumulated_num_deletions_"
would result in a logically "negative" value, but since
the two operands are unsigned (uint64_t), the result corresponding
to e.g., -1 would 2^64-1.

Instead, return 0 in that case.

Test Plan:
  - ensure "make check" still passes
  - temporarily add an "abort();" call in the new "if"-block, and
      observe that it fails in some test cases.  However, note that
      this case is triggered only when the two numbers are equal.
      Thus, no test case triggers the erroneous behavior this
      change is designed to avoid. If anyone can construct a
      scenario in which that bug would be triggered, I'll be
      happy to add a test case.

Reviewers: ljin, igor, rven, igor.sugak, yhchiang, sdong

Reviewed By: sdong

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D36489
2015-04-03 14:46:35 -07:00
..
builder.cc Add columnfamily option optimize_filters_for_hits to optimize for key hits only 2015-02-26 16:25:56 -08:00
builder.h Add columnfamily option optimize_filters_for_hits to optimize for key hits only 2015-02-26 16:25:56 -08:00
c_test.c rocksdb: Fixed 'Dead assignment' and 'Dead initialization' scan-build warnings 2015-02-23 14:10:09 -08:00
c.cc Deprecate removeScanCountLimit in NewLRUCache 2015-03-17 15:04:37 -07:00
column_family_test.cc Universal Compactions with Small Files 2015-03-30 15:12:02 -07:00
column_family.cc Universal Compactions with Small Files 2015-03-30 15:12:02 -07:00
column_family.h Don't delete files when column family is dropped 2015-03-19 17:04:29 -07:00
compact_files_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
compaction_job_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
compaction_job.cc Adding stats for the merge and filter operation 2015-03-24 14:42:04 -07:00
compaction_job.h Adding stats for the merge and filter operation 2015-03-24 14:42:04 -07:00
compaction_picker_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
compaction_picker.cc Disallow trivial move if compression level is different 2015-04-02 11:06:30 -07:00
compaction_picker.h Disallow trivial move if compression level is different 2015-04-02 11:06:30 -07:00
compaction.cc Disallow trivial move if compression level is different 2015-04-02 11:06:30 -07:00
compaction.h Disallow trivial move if compression level is different 2015-04-02 11:06:30 -07:00
comparator_db_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
corruption_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
cuckoo_table_db_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
db_bench.cc Add --stats_interval_seconds to db_bench 2015-03-30 12:58:32 -07:00
db_filesnapshot.cc Don't delete files when column family is dropped 2015-03-19 17:04:29 -07:00
db_impl_debug.cc Clean up old log files in background threads 2015-03-30 15:04:10 -04:00
db_impl_readonly.cc Move GetThreadList() feature under Env. 2014-12-22 12:20:17 -08:00
db_impl_readonly.h Block ReadOnlyDB in ROCKSDB_LITE 2014-11-26 11:37:59 -08:00
db_impl.cc Disallow trivial move if compression level is different 2015-04-02 11:06:30 -07:00
db_impl.h Clean up old log files in background threads 2015-03-30 15:04:10 -04:00
db_iter_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
db_iter.cc Adding stats for the merge and filter operation 2015-03-24 14:42:04 -07:00
db_iter.h reduce references to cfd->options() in DBImpl 2014-09-08 15:04:34 -07:00
db_test.cc db_test: clean up sync points in test cleaning up 2015-04-02 16:17:58 -07:00
dbformat_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
dbformat.cc Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
dbformat.h rocksdb: Add missing override 2015-02-26 11:28:41 -08:00
deletefile_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
fault_injection_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
file_indexer_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
file_indexer.cc Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
file_indexer.h Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
filename_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
filename.cc Sync manifest file when initializing it 2015-01-22 14:32:03 -08:00
filename.h Sync manifest file when initializing it 2015-01-22 14:32:03 -08:00
flush_job_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
flush_job.cc Allow GetThreadList() to report operation stage. 2015-03-13 10:45:40 -07:00
flush_job.h Allow GetThreadList() to report operation stage. 2015-03-13 10:45:40 -07:00
flush_scheduler.cc Don't return (or dereference) dangling pointer 2014-10-02 14:33:16 -07:00
flush_scheduler.h Fix data race #1 2015-01-26 11:48:07 -08:00
forward_iterator.cc rocksdb: Add missing override 2015-02-26 11:28:41 -08:00
forward_iterator.h rocksdb: Add missing override 2015-02-26 11:28:41 -08:00
internal_stats.cc Fix make unity build compiler warning about "stats" shadowing global variable 2015-04-01 10:48:42 -07:00
internal_stats.h Add a DB Property For Number of Deletions in Memtables 2015-03-18 17:03:59 -07:00
job_context.h Clean up old log files in background threads 2015-03-30 15:04:10 -04:00
listener_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
log_and_apply_bench.cc Add a counter for collecting the wait time on db mutex. 2015-02-04 21:39:45 -08:00
log_format.h Some minor refactoring on the code 2014-01-02 16:32:31 -08:00
log_reader.cc rocksdb: Fixed 'Dead assignment' and 'Dead initialization' scan-build warnings 2015-02-23 14:10:09 -08:00
log_reader.h Fix UnmarkEOF for partial blocks 2014-01-27 14:49:10 -08:00
log_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
log_writer.cc fix erroneous assert: cast kBlockSize (of type unsigned int) to "int" 2015-02-20 11:07:17 -08:00
log_writer.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
managed_iterator.cc Fix compile error on MacOS. 2015-02-24 16:24:53 -08:00
managed_iterator.h Managed iterator 2015-02-18 11:49:31 -08:00
memtable_allocator.cc Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00
memtable_allocator.h Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00
memtable_list.cc Add a DB Property For Number of Deletions in Memtables 2015-03-18 17:03:59 -07:00
memtable_list.h Add a DB Property For Number of Deletions in Memtables 2015-03-18 17:03:59 -07:00
memtable.cc Adding stats for the merge and filter operation 2015-03-24 14:42:04 -07:00
memtable.h Adding stats for the merge and filter operation 2015-03-24 14:42:04 -07:00
memtablerep_bench.cc Fix clang build 2015-01-13 12:27:28 -08:00
merge_context.h Enhance partial merge to support multiple arguments 2014-03-24 17:57:13 -07:00
merge_helper.cc Adding stats for the merge and filter operation 2015-03-24 14:42:04 -07:00
merge_helper.h Adding stats for the merge and filter operation 2015-03-24 14:42:04 -07:00
merge_operator.cc Some small cleaning up to make some compiling environment happy 2014-03-26 18:11:41 -07:00
merge_test.cc rocksdb: Add missing override 2015-02-26 11:28:41 -08:00
perf_context_test.cc Makefile minor cleanup 2015-03-30 16:05:35 -04:00
plain_table_db_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
prefix_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
repair.cc Deprecate removeScanCountLimit in NewLRUCache 2015-03-17 15:04:37 -07:00
skiplist_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
skiplist.h Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00
slice.cc Create an abstract interface for write batches 2015-03-17 19:23:08 -07:00
snapshot.h rocksdb: Add missing override 2015-02-26 11:28:41 -08:00
table_cache.cc TableMock + framework for mock classes 2014-10-28 17:52:32 -07:00
table_cache.h use GetContext to replace callback function pointer 2014-09-29 11:09:09 -07:00
table_properties_collector_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
table_properties_collector.cc Add rocksdb::ToString() to address cases where std::to_string is not available. 2014-11-24 20:44:49 -08:00
table_properties_collector.h rocksdb: Add missing override 2015-02-26 11:28:41 -08:00
transaction_log_impl.cc Turn -Wshadow back on 2014-11-06 11:14:28 -08:00
transaction_log_impl.h rocksdb: Add missing override 2015-02-26 11:28:41 -08:00
version_builder_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
version_builder.cc Fix deleting obsolete files 2015-02-06 08:44:30 -08:00
version_builder.h Move VersionBuilder logic to a separate .cc file 2014-10-31 16:34:38 -07:00
version_edit_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
version_edit.cc Turn on -Wshadow 2014-10-31 11:59:54 -07:00
version_edit.h Fix deleting obsolete files 2015-02-06 08:44:30 -08:00
version_set_test.cc Fix level size overflow for options_.level_compaction_dynamic_level_bytes=true 2015-04-03 09:04:35 -07:00
version_set.cc avoid returning a number-of-active-keys estimate of nearly 2^64 2015-04-03 14:46:35 -07:00
version_set.h Universal Compactions with Small Files 2015-03-30 15:12:02 -07:00
wal_manager_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
wal_manager.cc rocksdb: Add missing override 2015-02-26 11:28:41 -08:00
wal_manager.h Fix -Wnon-virtual-dtor errors 2014-11-10 17:39:38 -05:00
write_batch_base.cc Create an abstract interface for write batches 2015-03-17 19:23:08 -07:00
write_batch_internal.h remove all remaining references to cfd->options() 2014-11-18 10:20:10 -08:00
write_batch_test.cc rocksdb: Remove #include "util/string_util.h" from util/testharness.h 2015-03-19 17:29:37 -07:00
write_batch.cc Adding stats for the merge and filter operation 2015-03-24 14:42:04 -07:00
write_controller_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
write_controller.cc Push- instead of pull-model for managing Write stalls 2014-09-08 11:20:25 -07:00
write_controller.h Fix #284 2014-09-13 14:14:10 -07:00
write_thread.cc WriteThread 2014-09-12 16:23:58 -07:00
write_thread.h Add a counter for collecting the wait time on db mutex. 2015-02-04 21:39:45 -08:00
writebuffer.h Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00