feat: Add global mmap enable configuration (#31267) (#31373)

https://github.com/milvus-io/milvus/issues/31279
related pr: #31267

Signed-off-by: sunby <sunbingyi1992@gmail.com>

configs/milvus.yaml

@@ -354,6 +354,7 @@ queryNode:
       taskQueueExpire: 60 # 1 min by default, expire time of inner user task queue since queue is empty.
       enableCrossUserGrouping: false # false by default Enable Cross user grouping when using user-task-polling policy. (close it if task of any user can not merge others).
       maxPendingTaskPerUser: 1024 # 50 by default, max pending task in scheduler per user.
+  mmapEnabled: false # enable mmap global, if set true, will use mmap to load segment data
 
   # can specify ip for example
   # ip: 127.0.0.1

internal/datacoord/compaction_trigger.go

@@ -343,7 +343,7 @@ func (t *compactionTrigger) updateSegmentMaxSize(segments []*SegmentInfo) (bool,
 	}
 	vectorFields := typeutil.GetVectorFieldSchemas(collMeta.Schema)
 	fieldIndexTypes := lo.SliceToMap(indexInfos, func(t *model.Index) (int64, indexparamcheck.IndexType) {
-		return t.FieldID, getIndexType(t.IndexParams)
+		return t.FieldID, GetIndexType(t.IndexParams)
 	})
 	vectorFieldsWithDiskIndex := lo.Filter(vectorFields, func(field *schemapb.FieldSchema, _ int) bool {
 		if indexType, ok := fieldIndexTypes[field.FieldID]; ok {

internal/datacoord/index_builder.go

@@ -255,7 +255,7 @@ func (ib *indexBuilder) process(buildID UniqueID) bool {
 			return true
 		}
 		indexParams := ib.meta.indexMeta.GetIndexParams(meta.CollectionID, meta.IndexID)
-		indexType := getIndexType(indexParams)
+		indexType := GetIndexType(indexParams)
 		if isFlatIndex(indexType) || meta.NumRows < Params.DataCoordCfg.MinSegmentNumRowsToEnableIndex.GetAsInt64() {
 			log.Ctx(ib.ctx).Info("segment does not need index really", zap.Int64("buildID", buildID),
 				zap.Int64("segmentID", meta.SegmentID), zap.Int64("num rows", meta.NumRows))
@@ -333,7 +333,7 @@ func (ib *indexBuilder) process(buildID UniqueID) bool {
 
 		fieldID := ib.meta.indexMeta.GetFieldIDByIndexID(meta.CollectionID, meta.IndexID)
 		binlogIDs := getBinLogIds(segment, fieldID)
-		if isDiskANNIndex(getIndexType(indexParams)) {
+		if isDiskANNIndex(GetIndexType(indexParams)) {
 			var err error
 			indexParams, err = indexparams.UpdateDiskIndexBuildParams(Params, indexParams)
 			if err != nil {

internal/datacoord/index_service.go

@@ -225,7 +225,7 @@ func (s *Server) CreateIndex(ctx context.Context, req *indexpb.CreateIndexReques
 			metrics.IndexRequestCounter.WithLabelValues(metrics.FailLabel).Inc()
 			return merr.Status(err), nil
 		}
-		if getIndexType(req.GetIndexParams()) == indexparamcheck.IndexDISKANN && !s.indexNodeManager.ClientSupportDisk() {
+		if GetIndexType(req.GetIndexParams()) == indexparamcheck.IndexDISKANN && !s.indexNodeManager.ClientSupportDisk() {
 			errMsg := "all IndexNodes do not support disk indexes, please verify"
 			log.Warn(errMsg)
 			err = merr.WrapErrIndexNotSupported(indexparamcheck.IndexDISKANN)
@@ -270,7 +270,7 @@ func (s *Server) CreateIndex(ctx context.Context, req *indexpb.CreateIndexReques
 func ValidateIndexParams(index *model.Index, key, value string) error {
 	switch key {
 	case common.MmapEnabledKey:
-		indexType := getIndexType(index.IndexParams)
+		indexType := GetIndexType(index.IndexParams)
 		if !indexparamcheck.IsMmapSupported(indexType) {
 			return merr.WrapErrParameterInvalidMsg("index type %s does not support mmap", indexType)
 		}

internal/datacoord/util.go

@@ -182,7 +182,7 @@ func getCollectionAutoCompactionEnabled(properties map[string]string) (bool, err
 	return Params.DataCoordCfg.EnableAutoCompaction.GetAsBool(), nil
 }
 
-func getIndexType(indexParams []*commonpb.KeyValuePair) string {
+func GetIndexType(indexParams []*commonpb.KeyValuePair) string {
 	for _, param := range indexParams {
 		if param.Key == common.IndexTypeKey {
 			return param.Value

internal/querynodev2/segments/load_index_info.go

@@ -32,7 +32,9 @@ import (
 	"go.uber.org/zap"
 
 	"github.com/milvus-io/milvus-proto/go-api/v2/schemapb"
+	"github.com/milvus-io/milvus/internal/datacoord"
 	"github.com/milvus-io/milvus/internal/proto/querypb"
+	"github.com/milvus-io/milvus/internal/querycoordv2/params"
 	"github.com/milvus-io/milvus/pkg/common"
 	"github.com/milvus-io/milvus/pkg/util/funcutil"
 	"github.com/milvus-io/milvus/pkg/util/indexparamcheck"
@@ -73,7 +75,14 @@ func (li *LoadIndexInfo) appendLoadIndexInfo(ctx context.Context, indexInfo *que
 	indexPaths := indexInfo.IndexFilePaths
 
 	indexParams := funcutil.KeyValuePair2Map(indexInfo.IndexParams)
-	enableMmap := indexParams[common.MmapEnabledKey] == "true"
+
+	enableMmap := common.IsMmapEnabled(indexInfo.IndexParams...)
+	if !enableMmap {
+		_, ok := indexParams[common.MmapEnabledKey]
+		indexType := datacoord.GetIndexType(indexInfo.IndexParams)
+		indexSupportMmap := indexparamcheck.IsMmapSupported(indexType)
+		enableMmap = !ok && params.Params.QueryNodeCfg.MmapEnabled.GetAsBool() && indexSupportMmap
+	}
 	// as Knowhere reports error if encounter a unknown param, we need to delete it
 	delete(indexParams, common.MmapEnabledKey)
 

internal/querynodev2/segments/segment_loader.go

@@ -46,6 +46,7 @@ import (
 	"github.com/milvus-io/milvus-storage/go/storage/options"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/proto/querypb"
+	"github.com/milvus-io/milvus/internal/querycoordv2/params"
 	"github.com/milvus-io/milvus/internal/querynodev2/pkoracle"
 	"github.com/milvus-io/milvus/internal/storage"
 	typeutil_internal "github.com/milvus-io/milvus/internal/util/typeutil"
@@ -1074,7 +1075,8 @@ func loadSealedSegmentFields(ctx context.Context, collection *Collection, segmen
 		opts := opts
 		fieldBinLog := field
 		fieldID := field.FieldID
-		mmapEnabled := common.IsFieldMmapEnabled(collection.Schema(), fieldID)
+		mmapEnabled := common.IsFieldMmapEnabled(collection.Schema(), fieldID) ||
+			(!common.FieldHasMmapKey(collection.Schema(), fieldID) && params.Params.QueryNodeCfg.MmapEnabled.GetAsBool())
 		if mmapEnabled && options.LoadStatus == LoadStatusInMemory {
 			opts = append(opts, WithLoadStatus(LoadStatusMapped))
 		}

pkg/common/common.go

@@ -159,6 +159,20 @@ func IsFieldMmapEnabled(schema *schemapb.CollectionSchema, fieldID int64) bool {
 	return false
 }
 
+func FieldHasMmapKey(schema *schemapb.CollectionSchema, fieldID int64) bool {
+	for _, field := range schema.GetFields() {
+		if field.GetFieldID() == fieldID {
+			for _, kv := range field.GetTypeParams() {
+				if kv.Key == MmapEnabledKey {
+					return true
+				}
+			}
+			return false
+		}
+	}
+	return false
+}
+
 func IsCollectionLazyLoadEnabled(kvs ...*commonpb.KeyValuePair) bool {
 	for _, kv := range kvs {
 		if kv.Key == LazyLoadEnableKey && strings.ToLower(kv.Value) == "true" {

pkg/util/paramtable/component_param.go

@@ -1979,6 +1979,7 @@ type queryNodeConfig struct {
 	CacheEnabled     ParamItem `refreshable:"false"`
 	CacheMemoryLimit ParamItem `refreshable:"false"`
 	MmapDirPath      ParamItem `refreshable:"false"`
+	MmapEnabled      ParamItem `refreshable:"false"`
 
 	// chunk cache
 	ReadAheadPolicy     ParamItem `refreshable:"false"`
@@ -2200,6 +2201,14 @@ func (p *queryNodeConfig) init(base *BaseTable) {
 	}
 	p.MmapDirPath.Init(base.mgr)
 
+	p.MmapEnabled = ParamItem{
+		Key:          "queryNode.mmapEnabled",
+		Version:      "2.4.0",
+		DefaultValue: "false",
+		Doc:          "Enable mmap for loading data",
+	}
+	p.MmapEnabled.Init(base.mgr)
+
 	p.ReadAheadPolicy = ParamItem{
 		Key:          "queryNode.cache.readAheadPolicy",
 		Version:      "2.3.2",