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

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Siying Dong f48758e939 Deprecate CompactionFilter::IgnoreSnapshots() = false (#4954) ... Summary: We found that the behavior of CompactionFilter::IgnoreSnapshots() = false isn't what we have expected. We thought that snapshot will always be preserved. However, we just realized that, if no snapshot is created while compaction starts, and a snapshot is created after that, the data seen from the snapshot can successfully be dropped by the compaction. This creates a strange behavior to the feature, which is hard to explain. Like what is documented in code comment, this feature is not very useful with snapshot anyway. The decision is to deprecate the feature. We keep the function to avoid to break users code. However, we will fail compactions if false is returned. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4954 Differential Revision: D13981900 Pulled By: siying fbshipit-source-id: 2db8c2c3865acd86a28dca625945d1481b1d1e36		6 years ago
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rocksdb	Deprecate CompactionFilter::IgnoreSnapshots() = false (#4954)	6 years ago