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

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Islam AbdelRahman b49b92cf28 Introduce Read amplification bitmap (read amp statistics) ... Summary: Add ReadOptions::read_amp_bytes_per_bit option which allow us to create a bitmap for every data block we read the bitmap will contain (block_size / read_amp_bytes_per_bit) bits. We will use this bitmap to mark which bytes have been used of the block so we can calculate the read amplification Test Plan: added new tests Reviewers: andrewkr, yhchiang, sdong Reviewed By: sdong Subscribers: yiwu, leveldb, march, andrewkr, dhruba Differential Revision: https://reviews.facebook.net/D58707		8 years ago
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rocksdb	Introduce Read amplification bitmap (read amp statistics)	8 years ago