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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#pragma once
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namespace ROCKSDB_NAMESPACE {
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// A list of callers for a table reader. It is used to trace the caller that
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// accesses on a block. This is only used for block cache tracing and analysis.
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// A user may use kUncategorized if the caller is not interesting for analysis
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// or the table reader is called in the test environment, e.g., unit test, table
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// reader benchmark, etc.
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enum TableReaderCaller : char {
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kUserGet = 1,
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kUserMultiGet = 2,
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kUserIterator = 3,
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kUserApproximateSize = 4,
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kUserVerifyChecksum = 5,
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kSSTDumpTool = 6,
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kExternalSSTIngestion = 7,
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kRepair = 8,
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kPrefetch = 9,
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kCompaction = 10,
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// A compaction job may refill the block cache with blocks in the new SST
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// files if paranoid_file_checks is true.
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kCompactionRefill = 11,
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// After building a table, it may load all its blocks into the block cache if
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// paranoid_file_checks is true.
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kFlush = 12,
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// sst_file_reader.
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kSSTFileReader = 13,
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// A list of callers that are either not interesting for analysis or are
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// calling from a test environment, e.g., unit test, benchmark, etc.
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kUncategorized = 14,
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// All callers should be added before kMaxBlockCacheLookupCaller.
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kMaxBlockCacheLookupCaller
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};
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} // namespace ROCKSDB_NAMESPACE
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