fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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Dhruba Borthakur 9a357847eb Delete non-visible keys during a compaction even in the presense of snapshots. ... Summary: LevelDB should delete almost-new keys when a long-open snapshot exists. The previous behavior is to keep all versions that were created after the oldest open snapshot. This can lead to database size bloat for high-update workloads when there are long-open snapshots and long-open snapshot will be used for logical backup. By "almost new" I mean that the key was updated more than once after the oldest snapshot. If there were two snapshots with seq numbers s1 and s2 (s1 < s2), and if we find two instances of the same key k1 that lie entirely within s1 and s2 (i.e. s1 < k1 < s2), then the earlier version of k1 can be safely deleted because that version is not visible in any snapshot. Test Plan: unit test attached make clean check Differential Revision: https://reviews.facebook.net/D6999		12 years ago
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builder.cc	Allow having different compression algorithms on different levels.	12 years ago
builder.h	A number of fixes:	13 years ago
c.cc	Make compression options configurable. These include window-bits, level and strategy for ZlibCompression	12 years ago
c_test.c	The c_test was sometimes failing with an assertion.	12 years ago
corruption_test.cc	Fix all warnings generated by -Wall option to the compiler.	12 years ago
db_bench.cc	Support taking a configurable number of files from the same level to compact in a single compaction run.	12 years ago
db_filesnapshot.cc	The BackupAPI should also list the length of the manifest file.	12 years ago
db_impl.cc	Delete non-visible keys during a compaction even in the presense of snapshots.	12 years ago
db_impl.h	Delete non-visible keys during a compaction even in the presense of snapshots.	12 years ago
db_impl_readonly.cc	Add a readonly db	12 years ago
db_impl_readonly.h	Add a readonly db	12 years ago
db_iter.cc	A number of fixes:	13 years ago
db_iter.h	A number of fixes:	13 years ago
db_statistics.h	Compilation error while compiling with OPT=-g	12 years ago
db_stats_logger.cc	remove boost	12 years ago
db_test.cc	Delete non-visible keys during a compaction even in the presense of snapshots.	12 years ago
dbformat.cc	Added bloom filter support.	13 years ago
dbformat.h	Make some variables configurable for each db instance	12 years ago
dbformat_test.cc	Fix all warnings generated by -Wall option to the compiler.	12 years ago
filename.cc	put log in a seperate dir	12 years ago
filename.h	put log in a seperate dir	12 years ago
filename_test.cc	Fix all warnings generated by -Wall option to the compiler.	12 years ago
log_format.h	A number of fixes:	13 years ago
log_reader.cc	Fix all warnings generated by -Wall option to the compiler.	12 years ago
log_reader.h	A number of fixes:	13 years ago
log_test.cc	Fix all warnings generated by -Wall option to the compiler.	12 years ago
log_writer.cc	A number of fixes:	13 years ago
log_writer.h	A number of fixes:	13 years ago
memtable.cc	This is the mega-patch multi-threaded compaction	12 years ago
memtable.h	This is the mega-patch multi-threaded compaction	12 years ago
memtablelist.cc	This is the mega-patch multi-threaded compaction	12 years ago
memtablelist.h	This is the mega-patch multi-threaded compaction	12 years ago
repair.cc	This is the mega-patch multi-threaded compaction	12 years ago
skiplist.h	This is the mega-patch multi-threaded compaction	12 years ago
skiplist_test.cc	Fix all warnings generated by -Wall option to the compiler.	12 years ago
snapshot.h	Delete non-visible keys during a compaction even in the presense of snapshots.	12 years ago
table_cache.cc	Add two more options: disable block cache and make table cache shard number configuable	12 years ago
table_cache.h	Trigger read compaction only if seeks to storage are incurred.	12 years ago
version_edit.cc	Clean up compiler warnings generated by -Wall option.	12 years ago
version_edit.h	This is the mega-patch multi-threaded compaction	12 years ago
version_edit_test.cc	Make some variables configurable for each db instance	12 years ago
version_set.cc	Assertion failure while running with unit tests with OPT=-g	12 years ago
version_set.h	Assertion failure while running with unit tests with OPT=-g	12 years ago
version_set_reduce_num_levels.cc	disable size compaction in ldb reduce_levels and added compression and file size parameter to it	12 years ago
version_set_test.cc	Fix all warnings generated by -Wall option to the compiler.	12 years ago
write_batch.cc	added group commit; drastically speeds up mult-threaded synchronous write workloads	13 years ago
write_batch_internal.h	added group commit; drastically speeds up mult-threaded synchronous write workloads	13 years ago
write_batch_test.cc	Fix all warnings generated by -Wall option to the compiler.	12 years ago