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

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Jim Paton 74781a0c49 Add three new MemTableRep's ... Summary: This patch adds three new MemTableRep's: UnsortedRep, PrefixHashRep, and VectorRep. UnsortedRep stores keys in an std::unordered_map of std::sets. When an iterator is requested, it dumps the keys into an std::set and iterates over that. VectorRep stores keys in an std::vector. When an iterator is requested, it creates a copy of the vector and sorts it using std::sort. The iterator accesses that new vector. PrefixHashRep stores keys in an unordered_map mapping prefixes to ordered sets. I also added one API change. I added a function MemTableRep::MarkImmutable. This function is called when the rep is added to the immutable list. It doesn't do anything yet, but it seems like that could be useful. In particular, for the vectorrep, it means we could elide the extra copy and just sort in place. The only reason I haven't done that yet is because the use of the ArenaAllocator complicates things (I can elaborate on this if needed). Test Plan: make -j32 check ./db_stress --memtablerep=vector ./db_stress --memtablerep=unsorted ./db_stress --memtablerep=prefixhash --prefix_size=10 Reviewers: dhruba, haobo, emayanke Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D12117		11 years ago
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block.cc	[RocksDB] Refactor table.cc to reduce code duplication and improve readability.	12 years ago
block.h	[RocksDB] Refactor table.cc to reduce code duplication and improve readability.	12 years ago
block_builder.cc	add block deviation option to terminate a block before it exceeds block_size	12 years ago
block_builder.h	add block deviation option to terminate a block before it exceeds block_size	12 years ago
block_test.cc	[RocksDB] Move table.h to table/	12 years ago
filter_block.cc	Revert "Prefix scan: db_bench and bug fixes"	11 years ago
filter_block.h	Prefix filters for scans (v4)	11 years ago
filter_block_test.cc	Prefix filters for scans (v4)	11 years ago
format.cc	[RocksDB] Refactor table.cc to reduce code duplication and improve readability.	12 years ago
format.h	[RocksDB] Refactor table.cc to reduce code duplication and improve readability.	12 years ago
iter_heap.h	Use a priority queue to merge files.	12 years ago
iterator.cc	Codemod NULL to nullptr	12 years ago
iterator_wrapper.h	Codemod NULL to nullptr	12 years ago
merger.cc	[RocksDB] Minor iterator cleanup	11 years ago
merger.h	A number of fixes:	13 years ago
table.cc	Revert "Prefix scan: db_bench and bug fixes"	11 years ago
table.h	Revert "Prefix scan: db_bench and bug fixes"	11 years ago
table_builder.cc	Prefix filters for scans (v4)	11 years ago
table_test.cc	Add three new MemTableRep's	11 years ago
two_level_iterator.cc	[RocksDB] [Performance] Allow different posix advice to be applied to the same table file	12 years ago
two_level_iterator.h	[RocksDB] [Performance] Allow different posix advice to be applied to the same table file	12 years ago