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

Akanksha Mahajan 552fd765b3 Add IOTracer reader, writer classes for reading/writing IO operations in a binary file (#6958 An error occurred ) ... Summary: 1. As part of IOTracing project, Add a class IOTracer, IOTraceReader and IOTracerWriter that writes the file operations information in a binary file. IOTrace Record contains record information and right now it contains access_timestamp, file_operation, file_name, io_status, len, offset and later other options will be added when file system APIs will be call IOTracer. 2. Add few unit test cases that verify that reading and writing to a IO Trace file is working properly and before start trace and after ending trace nothing is added to the binary file. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6958 Test Plan: 1. make check -j64 2. New testcases for IOTracer. Reviewed By: anand1976 Differential Revision: D21943375 Pulled By: akankshamahajan15 fbshipit-source-id: 3532204e2a3eab0104bf411ab142e3fdd4fbce54		5 years ago
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block_cache_tracer.cc	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433 An error occurred )	5 years ago
block_cache_tracer.h	Fix more defects reported by Coverity Scan (#6935 An error occurred )	5 years ago
block_cache_tracer_test.cc	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433 An error occurred )	5 years ago
io_tracer.cc	Add IOTracer reader, writer classes for reading/writing IO operations in a binary file (#6958 An error occurred )	5 years ago
io_tracer.h	Add IOTracer reader, writer classes for reading/writing IO operations in a binary file (#6958 An error occurred )	5 years ago
io_tracer_test.cc	Add IOTracer reader, writer classes for reading/writing IO operations in a binary file (#6958 An error occurred )	5 years ago
trace_replay.cc	Fix multiple CF replay failure in db_bench replay (#6787 An error occurred )	5 years ago
trace_replay.h	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433 An error occurred )	5 years ago