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| 1 | +package NKikimrCompaction; |
| 2 | +option java_package = "ru.yandex.kikimr.proto"; |
| 3 | + |
| 4 | +enum ECompactionStrategy { |
| 5 | + CompactionStrategyUnset = 0; |
| 6 | + CompactionStrategyGenerational = 1; |
| 7 | + CompactionStrategySharded = 2; // DEPRECATED: use CompactionStrategyGenerational |
| 8 | +} |
| 9 | + |
| 10 | +message TCompactionPolicy { |
| 11 | + |
| 12 | + message TBackgroundPolicy { |
| 13 | + // How much (in %) of forced compaction criteria should be met to submit background task. |
| 14 | + optional uint32 Threshold = 1 [default = 101]; // no background compaction by default |
| 15 | + // Base background compaction priority value (less priority means more important task). |
| 16 | + // Value is used to compute real task priority basing on compaction criteria, time |
| 17 | + // in queue etc. |
| 18 | + optional uint32 PriorityBase = 2 [default = 100]; |
| 19 | + // Submitted background task may become more prioritized over time. |
| 20 | + // New priority is computed as priority /= max(log(elapsed_seconds) * factor, 1); |
| 21 | + optional double TimeFactor = 3 [default = 1.0]; |
| 22 | + optional uint32 TaskType = 4 [default = 5]; // DEPRECATED |
| 23 | + optional string ResourceBrokerTask = 5; |
| 24 | + } |
| 25 | + |
| 26 | + message TGenerationPolicy { |
| 27 | + optional uint32 GenerationId = 1; |
| 28 | + optional uint64 SizeToCompact = 2; |
| 29 | + optional uint32 CountToCompact = 3; |
| 30 | + optional uint32 ForceCountToCompact = 4; // OR one of force limits happend |
| 31 | + optional uint64 ForceSizeToCompact = 5; |
| 32 | + optional uint32 CompactionBrokerQueue = 6; // DEPRECATED |
| 33 | + optional bool KeepInCache = 7; |
| 34 | + optional TBackgroundPolicy BackgroundCompactionPolicy = 8; |
| 35 | + optional string ResourceBrokerTask = 9; |
| 36 | + optional uint32 ExtraCompactionPercent = 10; |
| 37 | + optional uint64 ExtraCompactionMinSize = 11; |
| 38 | + optional uint32 ExtraCompactionExpPercent = 12; |
| 39 | + optional uint64 ExtraCompactionExpMaxSize = 13; |
| 40 | + optional uint64 UpliftPartSize = 14; |
| 41 | + } |
| 42 | + |
| 43 | + //NOTE: default values must be in sync with ydb/core/base/localdb.cpp, TShardPolicy |
| 44 | + message TShardPolicy { |
| 45 | + // Adjacent shards smaller than this will be merged |
| 46 | + optional uint64 MinShardSize = 1 [default = 33554432]; |
| 47 | + |
| 48 | + // Shards bigger than this will split in two or more pieces |
| 49 | + optional uint64 MaxShardSize = 2 [default = 134217728]; |
| 50 | + |
| 51 | + // Slices smaller than this will get prioritized compaction |
| 52 | + optional uint64 MinSliceSize = 3 [default = 2097152]; |
| 53 | + |
| 54 | + // Level will be compacted when there are more than this number of slices |
| 55 | + optional uint32 MaxSlicesPerLevel = 4 [default = 256]; |
| 56 | + |
| 57 | + // Shard will be compacted when there are more than this number of levels |
| 58 | + optional uint32 MaxTotalLevels = 5 [default = 16]; |
| 59 | + |
| 60 | + // Shard will avoid compacting less than this number of levels |
| 61 | + optional uint32 MinLevelsToCompact = 6 [default = 2]; |
| 62 | + |
| 63 | + // Level will be compacted when it has X% of its data in upper levels |
| 64 | + optional uint32 NewDataPercentToCompact = 7 [default = 100]; |
| 65 | + |
| 66 | + // Level will be compacted when it has X% of its rows in upper levels |
| 67 | + optional uint32 NewRowsPercentToCompact = 8 [default = 0]; |
| 68 | + |
| 69 | + // Resource broker task type for compactions |
| 70 | + optional string ResourceBrokerTask = 9 [default = "compaction_gen1"]; |
| 71 | + |
| 72 | + // Base priority for compaction tasks |
| 73 | + optional uint32 TaskPriorityBase = 10 [default = 1000]; |
| 74 | + |
| 75 | + // Task priority will be increased for every N levels over the minimum |
| 76 | + optional uint32 TaskPriorityLevelsBoost = 11 [default = 1]; |
| 77 | + |
| 78 | + // Task priority will be decreased for every N bytes of input |
| 79 | + optional uint64 TaskPrioritySizePenalty = 12 [default = 4194304]; |
| 80 | + |
| 81 | + // Part data may be reused, unless it would leave this much garbage |
| 82 | + optional uint32 MaxGarbagePercentToReuse = 13 [default = 20]; |
| 83 | + |
| 84 | + // Minimum slice that that may be reused |
| 85 | + optional uint64 MinSliceSizeToReuse = 14 [default = 524288]; |
| 86 | + } |
| 87 | + |
| 88 | + optional uint64 InMemSizeToSnapshot = 1; |
| 89 | + optional uint32 InMemStepsToSnapshot = 2; // snapshot inmem state when size AND steps from last snapshot passed |
| 90 | + optional uint32 InMemForceStepsToSnapshot = 3; // OR steps passed |
| 91 | + optional uint64 InMemForceSizeToSnapshot = 4; // OR size reached |
| 92 | + optional uint32 InMemCompactionBrokerQueue = 5 [default = 0]; // DEPRECATED |
| 93 | + optional uint64 ReadAheadHiThreshold = 6 [default = 67108864]; |
| 94 | + optional uint64 ReadAheadLoThreshold = 7 [default = 16777216]; |
| 95 | + optional uint32 MinDataPageSize = 8 [default = 7168]; // 7KB is smallest optimal for 512 byte sectors |
| 96 | + optional uint32 SnapBrokerQueue = 9 [default = 0]; // DEPRECATED |
| 97 | + optional uint32 BackupBrokerQueue = 11 [default = 1]; // DEPRECATED |
| 98 | + optional uint32 DefaultTaskPriority = 12 [default = 5]; |
| 99 | + optional TBackgroundPolicy BackgroundSnapshotPolicy = 13; |
| 100 | + optional string InMemResourceBrokerTask = 14; |
| 101 | + optional string SnapshotResourceBrokerTask = 15; |
| 102 | + optional string BackupResourceBrokerTask = 16; |
| 103 | + optional uint64 LogOverheadSizeToSnapshot = 17; |
| 104 | + optional uint32 LogOverheadCountToSnapshot = 18; |
| 105 | + optional uint32 DroppedRowsPercentToCompact = 19; |
| 106 | + optional ECompactionStrategy CompactionStrategy = 20 [default = CompactionStrategyUnset]; |
| 107 | + optional TShardPolicy ShardPolicy = 21; |
| 108 | + optional bool KeepEraseMarkers = 22; |
| 109 | + optional uint32 MinBTreeIndexNodeSize = 23 [default = 7168]; |
| 110 | + optional uint32 MinBTreeIndexNodeKeys = 24 [default = 6]; |
| 111 | + |
| 112 | + repeated TGenerationPolicy Generation = 10; |
| 113 | +} |
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