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

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Mayank Agarwal fe3713961e Features in Transaction log iterator ... Summary: * Logstore requests a valid change of reutrning an empty iterator and not an error in case of no log files. * Changed the code to return the writebatch containing the sequence number requested from GetupdatesSince even if it lies in the middle. Earlier we used to return the next writebatch,. This also allows me oto guarantee that no files played upon by the iterator are redundant. I mean the starting log file has at least a sequence number >= the sequence number requested form GetupdatesSince. * Cleaned up redundant logic in Iterator::Next and made a new function SeekToStartSequence for greater readability and maintainibilty. * Modified a test in db_test accordingly Please check the logic carefully and suggest improvements. I have a separate patch out for more improvements like restricting reader to read till written sequences. Test Plan: * transaction log iterator tests in db_test, * db_repl_stress. * rocks_log_iterator_test in fbcode/wormhole/rocksdb/test - 2 tests thriving on hacks till now can get simplified * testing on the shadow setup for sigma with replication Reviewers: dhruba, haobo, kailiu, sdong Reviewed By: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D13437		11 years ago
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arena.h	Remove obsolete namespace mappings.	11 years ago
c.h	Replace include/leveldb with include/rocksdb.	11 years ago
cache.h	LRUCache to try to clean entries not referenced first.	11 years ago
compaction_filter.h	Remove obsolete namespace mappings.	11 years ago
comparator.h	Remove obsolete namespace mappings.	11 years ago
db.h	Remove obsolete namespace mappings.	11 years ago
env.h	Env class that can randomly read and write	11 years ago
filter_policy.h	Remove obsolete namespace mappings.	11 years ago
iterator.h	Remove obsolete namespace mappings.	11 years ago
ldb_tool.h	Remove obsolete namespace mappings.	11 years ago
memtablerep.h	Remove obsolete namespace mappings.	11 years ago
merge_operator.h	Remove obsolete namespace mappings.	11 years ago
options.h	LRUCache to try to clean entries not referenced first.	11 years ago
perf_context.h	Remove obsolete namespace mappings.	11 years ago
slice.h	Remove obsolete namespace mappings.	11 years ago
slice_transform.h	Remove obsolete namespace mappings.	11 years ago
statistics.h	Remove obsolete namespace mappings.	11 years ago
status.h	Remove obsolete namespace mappings.	11 years ago
table_builder.h	Remove obsolete namespace mappings.	11 years ago
table_stats.h	Add statistics to sst file	11 years ago
transaction_log.h	Features in Transaction log iterator	11 years ago
types.h	Remove obsolete namespace mappings.	11 years ago
universal_compaction.h	Remove obsolete namespace mappings.	11 years ago
write_batch.h	Remove obsolete namespace mappings.	11 years ago